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Cisco CCNP TSHOOT 642-832

Route TSHOOT: OSPF and Route Redistribution

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Video Titles Duration
1. TSHOOT: Setting Your Expectations
00:16:44
2. General TSHOOT: The Troubleshooting State of Mind
00:28:03
3. General TSHOOT: Troubleshooting Before You're Treading Water - Proactive Steps
00:17:59
4. General TSHOOT: Troubleshooting Before You're Treading Water - Proactive Steps, Part 2
00:39:55
5. General TSHOOT: IOS Tools to Monitor and Maintain the Network
00:27:30
6. General TSHOOT: IOS Tools to Monitor and Maintain the Network, Part 2
00:56:01
7. Switch TSHOOT: VLANs and Spanning Tree Concept Review
00:19:50
8. Switch TSHOOT: VLANs and Spanning Tree
00:30:08
9. Switch TSHOOT: VLANs and Spanning Tree, Part 2
00:28:56
10. Switch TSHOOT: L3 Switching and Redundancy Protocols Concept Review
00:21:40
11. Switch TSHOOT: L3 Switching and Redundancy Protocols
00:36:50
12. Switch TSHOOT: L3 Switching and Redundancy Protocols, Part 2
00:27:22
13. Route TSHOOT: L3 Connectivity and EIGRP Concept Review
00:23:08
14. Route TSHOOT: L3 Connectivity and EIGRP
00:48:50
15. Route TSHOOT: L3 Connectivity and EIGRP, Part 2
00:37:22
16. Route TSHOOT: L3 Connectivity and EIGRP, Part 3
00:19:03
17. Route TSHOOT: OSPF and Route Redistribution Concept Review
00:23:12
18. Route TSHOOT: OSPF and Route Redistribution
00:41:47
19. Route TSHOOT: OSPF and Route Redistribution, Part 2
00:29:42
20. Route TSHOOT: BGP Concept Review
00:18:35
21. Route TSHOOT: BGP
00:26:51
22. Route TSHOOT: Router Performance Issues Concept Review
00:28:57
23. Route TSHOOT: Router Performance Issues
00:43:34
24. Security TSHOOT: Access List Concept Review
00:17:22
25. Security TSHOOT: Access List Chaos
01:02:34
26. IPv6 TSHOOT: IPv6 and IPv6 Routing Protocols
00:21:29

TSHOOT: Setting Your Expectations

General TSHOOT: The Troubleshooting State of Mind

General TSHOOT: Troubleshooting Before You're Treading Water - Proactive Steps

General TSHOOT: Troubleshooting Before You're Treading Water - Proactive Steps, Part 2

General TSHOOT: IOS Tools to Monitor and Maintain the Network

General TSHOOT: IOS Tools to Monitor and Maintain the Network, Part 2

Switch TSHOOT: VLANs and Spanning Tree Concept Review

Switch TSHOOT: VLANs and Spanning Tree

Switch TSHOOT: VLANs and Spanning Tree, Part 2

Switch TSHOOT: L3 Switching and Redundancy Protocols Concept Review

Switch TSHOOT: L3 Switching and Redundancy Protocols

Switch TSHOOT: L3 Switching and Redundancy Protocols, Part 2

Route TSHOOT: L3 Connectivity and EIGRP Concept Review

Route TSHOOT: L3 Connectivity and EIGRP

Route TSHOOT: L3 Connectivity and EIGRP, Part 2

Route TSHOOT: L3 Connectivity and EIGRP, Part 3

Route TSHOOT: OSPF and Route Redistribution Concept Review

Route TSHOOT: OSPF and Route Redistribution

00:00:00 - OSPF and Route Redistribution.
00:00:03 - Oh, I love OSPF. Laugh I am not supposed to say that because
00:00:11 - EIGRP is Cisco's protocol, right? Of course it is. However once
00:00:15 - you really get OSPF it's in...and this is the way I describe
00:00:19 - it... because I get asked this question all the time...they say...people...people
00:00:22 - will ask me... there you go. So..., Jeremy, what's better? OSPF
00:00:26 - or EIGRP? And, you know, I look at them and I say, "well, without
00:00:30 - a doubt, EIGRP is the best routing protocol on the planet simply
00:00:34 - because Cisco created it and after we get done laughing for a
00:00:37 - little bit, I say, no seriously, EIGRP is awesome, provides features
00:00:40 - OSPF can't do. For instance, summarization anywhere just based
00:00:44 - on the interface, you've got unequal load cost balancing. You've
00:00:48 - got the dual algorithm which allows you to move much faster than
00:00:51 - OSPF. And, and then if people say "well...if you've got a Cisco
00:00:54 - only environment, then why would you choose to run OSPF, because
00:00:56 - a lot of people are doing it". And I say: "honestly, I mean,
00:00:59 - there's a lot of factors that can go into that. I mean, I mean...let
00:01:01 - me first say that...but,
00:01:03 - OPSF, once you get it, it's just cool. You know, you, you, you
00:01:08 - get into it and you're going "this protocol is awesome. I...
00:01:12 - why, because it takes so much stuff to figure it out to do it
00:01:15 - right. So much designing...ok, this area is over here. How does
00:01:19 - it, how does that work, you know. OK, virtual links, I mean. It's
00:01:22 - so rich with complexity
00:01:25 - that once you get it, it's cool. Best way I can compare it. Subnetting.
00:01:30 - Right? When you, when you didn't get subnetting, you are kind
00:01:33 - of like "that is horrific. Why would I ever do subnetting. You
00:01:36 - know, I've got subnetting calculators; I never want to do subnetting.
00:01:38 - But once you got it...assuming you got it...you're like "Subnetting
00:01:43 - is awesome." Right? The first...the first job that you went after,
00:01:46 - after that, you, you subnetted them to...to "Hi, what happened?
00:01:50 - Every use of VLAN is like a /28 and you've segmented in, you
00:01:54 - created this massive subnetting just because.... I got it, and
00:01:56 - it's awesome and I want to work with binary and all that. It's
00:01:58 - always feels the same way, right? So nonetheless, I digress an
00:02:02 - OSPF, and it's wonders. Four scenarios based around OSPF and
00:02:06 - Route Redistribution. There is some EIGRPness in these puzzles.
00:02:09 - We've got, 1, 2, 3, which...what I want to do is, again, I haven't
00:02:14 - looked at any of the solutions or anything like that. But just
00:02:17 - looking at the scenarios: scenario 1, 2 and 3 are so closely
00:02:21 - related, I wanted to walk through them with you and then, work
00:02:25 - on them one by one, but with the knowledge of them all together.
00:02:28 - That didn't make any sense, right? So laugh, I just want to read
00:02:32 - them with you before we get started because what I want to keep
00:02:36 - in my mind is "what's going on with client 3? What's going on
00:02:39 - with client 1?" Because as we start solving client 2, I have
00:02:43 - a feeling we are going to run in some of the issues client 1
00:02:45 - and 3 are experiencing as well. So, I just want to have those
00:02:49 - in the back of our minds as we are doing this. Say, OK, maybe
00:02:51 - we can solve some of those puzzles as we work through, for instance,
00:02:55 - scenario 1.. And then scenario 4,
00:02:59 - we've got OSPF authentication failure, which is something that's
00:03:02 - unrelated to the first three. So I just kind of camp on that
00:03:05 - one and once we get there, we get there. I think one of the reasons
00:03:09 - I get so excited about OSPF...and it is, it is specific to this
00:03:12 - set of nuggets, is because of this. Now, I know it's not pretty
00:03:17 - but this is the network modifications that were made for this
00:03:21 - next series of trouble tickets that we are now going to troubleshoot.
00:03:24 - And, when I was doing this, I was having flashbacks, I was, I
00:03:28 - was just thinking...oh, my goodness, this is, this is just like
00:03:30 - the CCIE. It was like... As I was drawing it with my pen, I was,
00:03:35 - I was almost transported back to taking that CCIA exam with my
00:03:39 - scratch paper going..."OK, here he is. They want me to do what?
00:03:42 - They want me to redistribute between...huh?...why would I ever
00:03:45 - do that, you know? I wouldn't do that", and then, arguing with
00:03:48 - myself on how crazy this CCIA level exam is. And then of course
00:03:52 - Cisco saying that they revised the CCMP to really prepare people
00:03:56 - for the CCIA, I saw this and I thought "oh, it's true; they did
00:04:01 - it", Laugh, and that's what they are doing. Now, this series of
00:04:03 - trouble tickets, unlike the others, is a little different.
00:04:08 - Because, it starts off with a series of facts, like a scenario
00:04:12 - to begin these scenarios...meaning: up to know, the trouble tickets
00:04:15 - have been kind of I don't want to say is self-contained because
00:04:18 - they could affect each other but essentially, the scenario and
00:04:22 - the trouble ticket is presented to you all within the trouble
00:04:24 - ticket. Here, they gonna say: "OK, here is what's happened and
00:04:27 - now, based on what's happened, let's do some troubleshooting.
00:04:30 - So let me...let me read through and I'll bring up the general
00:04:32 - facts. I have an all other slide but I just wanted to keep it
00:04:34 - right here in the lab topology while I talk through this so I
00:04:38 - can draw and point at things. So, the company, this company that
00:04:42 - you work for is moving from EIGRP to OSPF in two phases. Phase
00:04:47 - 1, they are going to migrate the headquarters. So this group
00:04:51 - of devices over here, you know, that HQ, where OSPF Area 0 lands,
00:04:57 - is going to is going to inhabit
00:05:01 - OSPF. Phase 2 will be to migrate all the branch offices. And
00:05:05 - then again, the scenario implies that this branch office is just
00:05:08 - one of many. It just happens to be the first branch office they
00:05:12 - started to move over to EIG... Oh sorry to OSPF. So,
00:05:18 - today is Saturday. As you walk into this scenario. Engineering
00:05:22 - has been busy changing protocols. Essentially, phase 1, which
00:05:26 - is migrating the headquarters, is done. They...they've got that
00:05:29 - done, split into the different areas. Phase 2 is beginning. And
00:05:33 - you, the protocol senior engineer, are available to troubleshoot
00:05:39 - and verify their operation. So essentially, you're sitting here
00:05:43 - on staff, on Saturday, in order to decide which direction they
00:05:46 - want to go. Now, the company has made a decision,
00:05:50 - that, when you reach Sunday, you either need to make the decision
00:05:54 - to continue to move forward with OSPF or to roll back to EIGRP,
00:05:59 - saying "you know, this don't work out. Let's stay with EIGRP
00:06:02 - and all of that". So, so, this, it's, it's you know, an active
00:06:05 - migration. You're in the midst of it right now. The current branch
00:06:08 - office is a test site for how the future branch offices will
00:06:12 - work. And, if you imagine with me, you know, imagine other CRO
00:06:16 - route or maybe these CRO routers connected to other branch office
00:06:20 - out here...that are currently on EIGRP. What they are doing,
00:06:24 - they are using this branch office to test redistribution, to
00:06:28 - say, "OK, can we have EIGRP redistribute into OSPF and everything
00:06:33 - still work OK or, is it not going to work out?" EIGRP, now pardon
00:06:38 - me, OK -. So what they have, they've split this branch office.
00:06:44 - They've got some VLANs, and specifically VLAN 16 and 17 I just
00:06:49 - put 17 here because that's what our client is on and that's what
00:06:51 - we use for troubleshooting. Some VLANs are using BRO1 as a default
00:06:57 - gateway which means as part of the EIGRP-side of things. Other
00:07:01 - VLANs which include 18, 19 and 128 these guys have been made
00:07:05 - a part of OSPF Area 11 and are using BRO2 as a default gateway.
00:07:10 - So I only documented VLAN 18 because and that's why client 3
00:07:13 - is going to be a member of and we'll use him for testing. So,
00:07:16 - that's the puzzle that we are putting together, pieces of the
00:07:20 - puzzle that are active in this scenario. So now, here we are,
00:07:25 - it's Saturday, we get our first call. Scenario
00:07:30 - 1: After the OSPF/EIGRP/ redistribution implementation, Client
00:07:36 - 2 that's this guy out here cannot ping Server 1 that means this
00:07:43 - guy out here. Attempts to browse to http://isp3.tshoot.local
00:07:50 - also fail. OK. Well, I am just brainstorming right now, already
00:07:56 - thinking through some of the possibilities. Obviously, if this
00:08:00 - is a DNS name, I am assuming, Server 1 is the DNS server. So
00:08:04 - we can't even venture into resolving host names until the connection
00:08:09 - to Server 1 is repaired. So let's look at that guy first. It
00:08:14 - says Client 2 uses BRO1 as its default gateway which is good.
00:08:18 - That tells us that's in the EIGRP domain which is probably doing
00:08:22 - some redistribution action with OSPF and
00:08:25 - vice versa. So our job is to diagnose and resolve the problem,
00:08:30 - if possible. Of course it's possible! We are Cisco's superstars! So,
00:08:36 - I think the best place to start with this scenario is gonna be
00:08:40 - over on Client 2. Let's just start there. I opened an RDP connection
00:08:46 - too and beforehand so that I have it ready. So here is Client
00:08:51 - 2. Then I go "open a command prompt".
00:08:57 - And let's do an "ipconfig".
00:09:01 - Ok, good. That tells us he is getting an IP address, which is
00:09:06 - a good sign. Let's just ping his default gateway and make sure
00:09:08 - we are getting there as well...60.65.
00:09:12 - OK, that's good. It's a good start....Let's.... laugh
00:09:18 - You know what? With some of the previous scenarios, I am not
00:09:21 - taking the risk. Let's just ping straight through the Server
00:09:24 - 1 and see if that works. Bring Server 1 in the picture because
00:09:27 - I need his IP address.
00:09:31 - I got you. Captured.
00:09:34 - Let's go back over.
00:09:37 - Ping...laugh...I don't want to get too far down the road to troubleshooting
00:09:41 - when it really does work. OK. Oh...ok. So we just ping this server
00:09:48 - IP address but notice I don't know if you've gone through this
00:09:51 - experience before but most of the time when you ping something,
00:09:54 - you get "Request timed out. Request timed out. Request timed
00:09:57 - out." Then the reason that that happens is because, usually,
00:10:01 - the router that's in front of you thinks it knows how to get
00:10:03 - there. This is a little different. In this case, the router in
00:10:07 - front of you, meaning who is that BRO1 does not know how to get
00:10:12 - there because there is only two kinds of messages that can be
00:10:15 - returned: one is going to be the typical well I won't even say
00:10:18 - it's returned is the...I just put Request dot T Request Timed
00:10:23 - Out. The second is an ICMP I changed to a nice fatty marker here
00:10:30 - so I could draw lines through this and you are able to see it.
00:10:33 - So that's why my writing is so big here but ICMP unreachable,
00:10:38 - how do you spell it... unreach... Now here is the scoop coughing
00:10:42 - Excuse me. Typically, when you try to access a destination, it
00:10:46 - will go to your default gateway. Your gateway looks: oh, I've
00:10:49 - got a default router, and sends it on. Let's say somewhere down
00:10:52 - the line, let's say CRO1, doesn't know how to get to Server 1,
00:10:56 - well, if he drops the packets, what is going to do is send an
00:11:01 - ICMP Unreachable message to BRO1 saying "I don't know how to
00:11:05 - get there", but BRO1 never forwards those back, which is why
00:11:11 - in most situations, Client 2 will see Request timed out, Request
00:11:15 - Timed out. And it kind of hangs there while, you know what I
00:11:16 - am talking about, on that command prompt. It kind of hangs there.
00:11:19 - So in this case, it's not it's not doing that. It's coming right
00:11:23 - back saying "destination host unreachable". And you know what
00:11:25 - that tells me? That tells me BRO1
00:11:29 - doesn't know how to get there. So the packet is getting right
00:11:32 - here. BRO1 is like "I don't know how to get there". So he returns
00:11:36 - the message directly to Client 2 of ICMP Unreachable and that's
00:11:40 - where we get the destination message "unreachable". That's the
00:11:43 - whole key with these guys. They only go one router hop. So if
00:11:46 - you are any further than the router right in front of you, you
00:11:48 - are always going to see Request Timed Out. However, we're kind
00:11:51 - of lucky with this case because it points the finger immediately
00:11:53 - right at BRO1. Let's go there. Now, bring our
00:12:00 - ...now back at the picture here
00:12:03 - ...I was just
00:12:07 - using a Cisco IP communicator. I set up a little voice over IT
00:12:10 - lab, made a phone call to a friend of mine and, just for fun,
00:12:13 - I actually used Wireshark to capture the RTP packets of the phone
00:12:17 - call. And did you know you can actually use Wireshark and reassemble
00:12:20 - the whole conversation into an Au-file which you can convert
00:12:23 - to a WAY file. It's pretty cool. This is what I was doing this
00:12:26 - afternoon. It was fun. So, BRO1. Back to our Client who is offline
00:12:32 - we shouldn't talk about such things when Client 2 is offline
00:12:34 - . So, back to BRO1.
00:12:40 - Resize this connection. Let's go here and just do
00:12:45 - a do some of that... IP address on a clip board? Yeah. Let's
00:12:48 - do a ping, a ping right there. Yeah, we are not getting there.
00:12:51 - Let's do a show IP route and see if there is anything in the
00:12:54 - routing table. That
00:12:59 - routing table has...We've got we've got some D route. Now looking
00:13:05 - back at our diagram, we've got IEGRP running in this small area
00:13:10 - of the network and then everything else is OSPF. Now, if redistribution
00:13:13 - really was set up the way that they said it should be, we should
00:13:17 - see a whole bunch of external routes 'cause EIGRP has the ability
00:13:20 - to mark things as outside of the EIGRP domain. Look at that:
00:13:24 - right there! External. So it should say D EX which lets you know
00:13:28 - it's from outside. So something is not right with redistribution.
00:13:33 - I'm guessing these few routes are probably just like -f you look
00:13:35 - at them, they are all /30s. They are just probably in our EIGRP
00:13:40 - system. So, we've got an issue with redistribution. So let's see
00:13:44 - who's...Let's go to CRO1, he is a border router.
00:13:49 - In OSPF's terms, he is an area border router. So he would be
00:13:52 - doing the redistribution from OSPF to EIGRP. So could this guy.
00:13:57 - But let's, let's just start with CRO1 and begin there.
00:14:02 - Where is my Firefox? There we go. Bring CRO1 into the scene...
00:14:08 - Hello CRO1....Oh right, so let's see, if he can ping. Can you
00:14:18 - get there my friend? laugh I can't ping 52. I must have highlighted
00:14:23 - something on the clipboard.
00:14:28 - This...Right there...- Ping that guy. Ok, ok good. So CRO1 is
00:14:36 - getting there. So, there is definitely a redistribution problem.
00:14:40 - Let's do a "show run
00:14:44 - section router eigrp". OK. I am seeing redistribute OSPF 100.
00:14:55 - So I'm going also do a "show run section router ospf" and see
00:15:00 - his scenario. It should be OK. It looks like this guy is doing
00:15:05 - two-way redistribution. OK. Wait a sec. Hang on. Hang
00:15:13 - on. That's not
00:15:15 - enough. If you just type in "Redistribute ospf 100", EIGRP, as
00:15:20 - a matter of fact jumps back here. EIGRP does not have a default
00:15:24 - metric for routes. Both RIP
00:15:29 - and EIGRP failed the default metric test. So if I redistribute
00:15:34 - OSPF into EIGRP just like they are doing here, but I don't specify
00:15:38 - a metric, then they are going to come in with an infinite metric.
00:15:41 - I'll just put, you know, infinity.... So, the first router to
00:15:45 - get them is going to say those are invalid routes; so, I am not
00:15:47 - going to take them. I am just going to try that. Let's see if
00:15:52 - that solves anything. Now, I am looking the other way and they
00:15:54 - are doing the same thing here. But OSPF does have a default metric.
00:15:58 - I think it is 25, just nice random number. So we don't have to
00:16:02 - specify with OSPF but with EIGRP, we definitely do. That's a
00:16:05 - problem. So
00:16:07 - let's try that and just see if that makes any, any boats rock.
00:16:13 - What does that mean? Alright. So let's do a
00:16:19 - metric laugh. So when you specific the metric for EIGRP, it's
00:16:22 - like, hum...let's roll the dice... how about
00:16:26 - 1500? How about 0? How about
00:16:31 - 200? How about? Usually, I just do 10, 10, 10, 10, all the way
00:16:34 - across but, for fun, we'll change it up. You have to specify
00:16:40 - all these even though EIGRP only uses bandwidth with delay by
00:16:43 - default for the metric. This is one of the disadvantages of doing
00:16:47 - redistribution is you totally lose the accuracy of your metrics. So,
00:16:51 - OK, we've got that done now. Now let me just do a "show run router
00:16:57 - eigrp". OK, we are specifying metrics. Let's, let's go back.
00:17:00 - Let's go to BRO1 again. this guy.
00:17:05 - Here we go -. Let's do a "show ip route"
00:17:11 - now. Hey, there we go! That's what I'm talking about. We've got
00:17:16 - external routes, coming in left, and right. Good. Good, good,
00:17:20 - good, good, good. OK. OK. So, OK. So first off, we are missing
00:17:25 - a metric on redistribution router. So now, I am just, I'm curious.
00:17:30 - Let's do a ping again. So let's a
00:17:33 - ping...- why can't I remember this guy's IP address? There it
00:17:37 - is: 10.1.152.1. Hey, look at that! OK. Well let's see if that
00:17:47 - did it then. Let's go back over to our client, right here, and
00:17:51 - if the...
00:17:54 - OK...Puzzle number
00:17:56 - 2. What have we got here? We've got now Request timed out. So
00:18:02 - again, and we just verified that our router BRO1 can indeed.
00:18:07 - It's getting all the way there. And we know that Client 2 is
00:18:11 - getting to BRO1, but Client 2 can't get all the way there. So,
00:18:14 - you know what this tells me? This tells me, this tells me that
00:18:18 - Server 1 is not able to get back because again, we just verified:
00:18:23 - BRO1 can ping Server 1. Client 2 can ping that, so, so, again,
00:18:27 - Server 1 must be missing this subnet, or not able to reach that
00:18:32 - subnet from...from there. So
00:18:37 - let's...See, where to begin with that one?
00:18:41 - Let's...Let's start from his closest router. Let's go to CSW1.
00:18:44 - We know that
00:18:47 - CSW1, right here, is going to be his default gateway. And that...
00:18:50 - and we know that it can reach the outside interface of BRO1,
00:18:53 - just not this VLAN for whatever reason. So let's go over
00:18:59 - there. Take a road trip with me to CSW1.
00:19:06 - I wish SecureCRT would just open the right size every
00:19:11 - time...There we go. laugh I know someone out there just thought
00:19:14 - "I know how you can fix that". Yeah...I know. laugh Some global
00:19:19 - setting somewhere. But who has, who has the time? Who has the
00:19:23 - time... so, let's do a "show ip route" here. So, well I guess,
00:19:28 - let's... So he's getting some intra area route. But you know,
00:19:32 - I don't see any external routes
00:19:36 - on...on CSW1. Again, OSPF should show external routes as well
00:19:43 - if redistribution is indeed happening. It should be E1 or E2,
00:19:48 - right here... depending on the kind of redistribution. So something's
00:19:53 - up with the redistribution on
00:19:56 - CRO1. Let's go there
00:19:58 - again. CRO, CRO, CRO, CRO, CRO, CRO...Here we are.
00:20:03 - CRO1. Let's do a "show run"... because we had the router OSPF.
00:20:08 - OK. So what's going on? Let's
00:20:11 - see. Redistribute EIGRP
00:20:14 - 1. Why does that look
00:20:18 - short to me? Now, OSPF does have a default metric. So I know
00:20:22 - it's not that. But, let's just, hang on, let's just do a "redistribute
00:20:26 - eigrp 1" which is our autonomous system. Do a question
00:20:31 - mark. Metric. I wonder if we should set up a metric for greens.
00:20:37 - I forgot all about that
00:20:40 - guy. That's not good. Subnets, subnets, subnets. So the subnets
00:20:46 - will allow you to
00:20:48 - redistribute the subnets otherwise OSPF will do automatic redis...
00:20:52 - oh what am I saying? Automatic summarization to where, if you
00:20:56 - don't specify subnets, OSPF is going to try and send the entire
00:20:59 - Class A network of 10 which in this case isn't gonna happen because
00:21:04 - we've got all these subnets of tens of 000. So these guys will
00:21:08 - reject that router and are going to say "No, we don't believe
00:21:11 - you." Now that you have that... Hang on, let's try that. I am
00:21:15 - going to redistribute EIGRP1. Let's add
00:21:21 - subnets on there. Subnets. Now, it's not specifying a metric
00:21:23 - yet. See if that does anything. OK, so the key word is on there.
00:21:28 - Let's go over to CSW2. Take that road trip. No, CSW1. Or layer
00:21:33 - 3 switch. "Switch show ip route" now. Come on! Give me something.
00:21:40 - There! Oh! Look at that! We've got an external, external type
00:21:43 - 2 route. Hey, Hey? Why am I saying hey? It's like a Canadian,
00:21:47 - a Canadian hey? OK, OK good. So...Hang
00:21:54 - on...Hold the
00:21:58 - phone. Hey...Look at
00:22:01 - that! I love it! I love it when that works. OK. So... OK, so
00:22:05 - that's it. No, no, that's not it; that is not it. We still have
00:22:11 - this half of the puzzle. "Attempts to browse isp3.tshoot also
00:22:16 - fail. So maybe now that the DNS is resolved or, I should say
00:22:21 - the connection to ISP1 is resolved... as a matter of fact, I
00:22:24 - don't even
00:22:26 - know. I don't even know... wrong one there
00:22:33 - if the Server 1 is being used. OK, it is, it is the DNS server.
00:22:38 - So now that that's resolved, let's ping
00:22:45 - isp3.tshoot.local. See, I am so insecure, I'm into security,
00:22:47 - I am thinking IPS
00:22:49 - sensors. OK, OK.
00:22:52 - We are unreachable again. So this means
00:22:58 - that, well it means that BRO1 doesn't know how to get to
00:23:03 - ISP3. And BRO1 probably doesn't know how to get there I am guessing.
00:23:07 - If I remember that routing table, I don't think BRO1 where is
00:23:12 - it?...No...There we go I don't think BRO1 had default route.
00:23:16 - Did he?...Scroll down. Gateway of last resort is not set...I
00:23:22 - am just scrolling down to the bottom. We've got nothing! Alright.
00:23:28 - So...So we need a default route. And my thought is that they
00:23:34 - don't want us to statically put a router. Now, they didn't say
00:23:37 - it in the lab. But I am assuming they would not want that. They
00:23:39 - would want these ISP
00:23:42 - gateways to originate a default route into the
00:23:46 - system. So, let's go
00:23:50 - there. Start with IRO2 because it is closer to Client 2 and it
00:23:55 - has a 2 in its name. Alright, let's do a "show ip route". Let's
00:24:01 - see if that guy knows how to get there. He does have a static
00:24:06 - route. Now OSPF. In order to get OSPF to inject... well, where
00:24:09 - is his
00:24:12 - routes?...he's only got two OSPF routes. Is
00:24:19 - that good? Let's find out. Router
00:24:22 - OSPF. Oh
00:24:26 - right laugh. Meanwhile, while we are obviously on a 2600 series
00:24:32 - router, Ok, there we go. So we've got, let's see...Area
00:24:41 - 100. So, OK. So, we're running this. Nope, no passive interface.
00:24:44 - That one
00:24:47 - 129. Let's just do a "show sleepy neighbors"...OK, so he's
00:24:52 - connecting to CSW2 on
00:24:59 - FastEthernet 0/0....dot 129. I am assuming that that's his DNS
00:25:03 - interface. He's getting
00:25:05 - some routes. Let's
00:25:08 - check out...see what we've got. These guys are in OSPF Area 100,
00:25:12 - right? Let me see that again. So this 's Area 100. That's accurate.
00:25:17 - We're good. We're forming neighbors right? "Show ip
00:25:26 - OSPF neighbor". OK. We've got our default
00:25:31 - information originate. So why? Let's see if this command should
00:25:35 - be sending the default route into the system. Now you can throw
00:25:38 - it all in there. But that's only necessary if you don't have
00:25:41 - a default route yourself. Passive interface...I am just trying
00:25:46 - to put the pieces of the puzzle together. Let's go to over to
00:25:52 - CSW2 because IRO2 is forming a relationship with him. See if
00:25:55 - he has
00:25:57 - a default route. Now, I don't know why I just did that. "Show
00:26:05 - IP route", show sleepy neighbor, show
00:26:09 - IP route. We've got nothing. Why no default route? Gateway of
00:26:13 - last resort is not set. He's forming
00:26:18 - a relationship. How would he not send a
00:26:25 - default route? OK, let me just talk through this. What do we
00:26:27 - know? We
00:26:29 - know IRO2 does have a default route to the Ethernet which I,
00:26:34 - I didn't verify that but he has a default route in his table.
00:26:37 - Let's start there. We know he has a
00:26:40 - default route.
00:26:42 - We know he has a relationship with CSW2, right? because that
00:26:46 - was the only router he could possibly form a relationship with.
00:26:52 - Let's see. Who is that? 192
00:26:55 - dot 19.
00:27:03 - Check that.1...119...92 where
00:27:07 - are we at? 92 dot 13, is that
00:27:10 - what I said?
00:27:16 - No, 19, 19. Who's that neighbor relationship with? 220 dot 3,
00:27:21 - 10 dot
00:27:24 - 1 dot
00:27:29 - 192 dot 19. Who are you
00:27:33 - talking to? 192?
00:27:36 - No. 192 19?
00:27:38 - Have you seen it? But CDP is showing the only thing he sees via
00:27:45 - CDP is CSW2 and
00:27:47 - FAS Ethernet 0. Going into FAS Ethernet 2. Hang on, hang with
00:27:50 - me here for a second. I am going to do a show VLAN. Just see
00:27:57 - what, well it won't show up. "Show run
00:28:04 - interface FA0/ 2". OK. So native VLAN is 1000. Allowed VLAN
00:28:10 - 12 and 129. 12 and 129? That sounds right
00:28:17 - because he is running no passive interface. Let's take a look
00:28:21 - at that interface:
00:28:27 - "show run interface". Paste. What have we got? We've got
00:28:31 - transit, nat inside, dot 20. So this is VLAN 129. So may be am
00:28:36 - I just missing it? Hang on. VLAN 129. Oh, did I just
00:28:44 - not see that? 192
00:28:47 - dot 19, 192 dot 18. I didn't think of the HSRP. "Show
00:28:57 - run interface
00:28:59 - VLAN129". No, you're right, scratch that. It's not...so where
00:29:02 - is dot 19? Is that CSW1? Did they form a relationship over there
00:29:07 - even though it doesn't show up via CDP? It's kind of bizarre,
00:29:14 - guys. Let's see. Well, thank you very much. Oh wait, I already
00:29:20 - have a connection to him somewhere down on
00:29:25 - the list.
00:29:28 - There we go. No, he is not getting a default gateway, so let
00:29:31 - me just do a
00:29:33 - "show ip interface brief
00:29:37 - include VLAN 129". Yeah, that was a long shot laugh. Let's get
00:29:40 - the syntax in capitalization just right. VLAN, OK, no
00:29:46 - space. VLAN 129. 17. Where is dot 19
00:29:53 - coming from? I am just trying to find out who this neighbor is
00:29:56 - that he is seeing
00:30:00 - in his table. Again, CRO, what
00:30:06 - we've got. BRO. Let's do this. Let's
00:30:14 - go to IRO2 laugh. I've got to name these windows. I just flip
00:30:18 - them around constantly. Let's do a "show
00:30:22 - cdp neighbor detail". Who are you talking about? So here seems
00:30:25 - to be one. So 18. But he's forming a
00:30:31 - relationship with 19.Ping
00:30:37 - 19. Ping 18. Are
00:30:40 - these different people? Oh,
00:30:43 - OK. Ping
00:30:46 - 18. So let's
00:30:51 - do a
00:30:55 - "show arp". So look at that. We've got
00:31:00 - a mystery router. laugh. So dot 19 is coming from somewhere. But
00:31:03 - we don't know where. But that's OK; Maybe it's the ISP. Maybe
00:31:09 - it's...who knows! Who knows what that is. But for now, let's
00:31:12 - do this. Let's work on getting, if we need to... Let's figure
00:31:17 - this out. Let's do a "CSW2 show run
00:31:26 - section router ospf".
00:31:29 - Cisco upgrader switches. Alright.
00:31:34 - So.... Not
00:31:36 - include. Begin with. Alright. So, let's see. Router OSPF. We've
00:31:41 - got no path; So ok, it's running on
00:31:47 - there. 192 dot 9? Dot 18? Dot 18. Ok, this is good. We are forming
00:31:59 - in Area 100.
00:32:02 - What's the scoop? "Show
00:32:08 - ip OSPF neighbors". OK, so we're seeing somebody on VLAN 99,
00:32:14 - or VLAN
00:32:17 - 129 dot 17. And that
00:32:24 - is IRO2, right? No, he's
00:32:27 - dot 20. He's dot 20? This is impossible. We have a mystery device.
00:32:33 - Hang on, hang on. Let's do a lot of logging here. So we've got
00:32:38 - IRO2: he's dot 20, right?
00:32:43 - CSW1, he's dot 18. CSW... who's
00:32:54 - this guy? CSW1. He is... did I say
00:32:59 - 1 or 2 before?
00:33:04 - He's dot 17. Dot 17
00:33:10 - on VLAN 129. So we have a relationship
00:33:18 - between 20 and who?
00:33:22 - The problem..; 19, right? Is
00:33:27 - that 19? Show. And we're forming a relationship with dot 19.
00:33:30 - And they happen to be the BDR. Whoever
00:33:38 - router IDed that. "Show
00:33:44 - ip ospf database". Ok, just looking at which ones are
00:33:50 - who. OK. So this is the mysterious dot 1...Is it not IRO1? We
00:33:56 - form a relationship with
00:33:59 - IRO1? Hang on. Again, this is where that spreadsheet
00:34:03 - would come in handy. Alright, so let's do "show
00:34:08 - ip"...He's the only one I can think of that would be
00:34:12 - in that VLAN. OK. OK, so we're forming a relationship with him.
00:34:17 - So he is the missing piece, he's
00:34:20 - the missing link. Dot 19 is right there. So these guys have
00:34:26 - formed a relationship apparently. But, let's hang on. Let's look
00:34:30 - at him: "show
00:34:33 - ip ospf neighbor" but they are not forming a relationship with
00:34:37 - the layer 3 switches. Why would that be? So let's, ok, now we're
00:34:41 - going places. Let's
00:34:45 - look at IRO1: "show run
00:34:51 - section router ospf". And meanwhile, let's also look at CSW2.
00:34:56 - I'm just going to look through this line by line. So we've got
00:34:58 - no passive interface. So this is good. And it's definitely forming
00:35:03 - relationship on here. It's
00:35:06 - just ignoring... Hang on. What would cause it to
00:35:12 - ignore those relationships? May
00:35:15 - be if... no, that's Area 1. Area 1 authentication message-digest.
00:35:19 - So that's no worries. So
00:35:23 - VLAN 129. So: "show run
00:35:27 - interface VLAN 129". Nothing
00:35:34 - special under there. "248". I'm just kind of doing a comparison
00:35:37 - between the two.
00:35:41 - No passive interface. "Show
00:35:48 - run interface
00:35:50 - FA0/0.129". So same. Oh, why did they do that? Why would you
00:35:57 - do that? Why would you do something like that? OK. Is that the
00:36:04 - same way? "Show
00:36:10 - run interface
00:36:12 - FA0/0.129". Look at this! How did I not see that? Did I just miss
00:36:14 - that before? OK. Default Hello timers on OSPF are 10 seconds.
00:36:20 - And I did not see. Actually I know there was no modification
00:36:25 - on the hello times on OSPF on these guys. So these guys are forming
00:36:29 - relationships. These guys are just doing a 5 second hello timer.
00:36:32 - So they're forming relationships; So you know, I like the 5 second
00:36:38 - Hello timer better. I bet you, watch this: let's go for him.
00:36:44 - "Interface VLAN 129
00:36:48 - ip ospf, hello-interval
00:36:56 - 5". "Dead interval 15". Meanwhile, new neighbor. Won't you be
00:37:04 - my neighbor? Where are we at? Where're we at? Where are we
00:37:09 - at? Come on...laugh Trying to find the right window. No. OK,
00:37:14 - there we go. Let's
00:37:19 - go "interface VLAN"...let's just do "run
00:37:23 - interface VLAN 129". Make sure this guy is the same. That's what
00:37:25 - I thought.
00:37:29 - "Interface VLAN 129". IP OSPF hello...men, I should have documented
00:37:33 - those IP addresses long ago; I would have easily seen that. "15"...Change
00:37:42 - that to "dead". Alright. So change those OK. We've got new neighbors.
00:37:49 - Hello neighbor! Hello neighbor. Alright. New neighbors, 3 new
00:37:52 - neighbors. As we would hope
00:37:55 - them to be. Now, let's go back and do a
00:38:00 - "show ip route". See, now we are getting
00:38:04 - that default route that is been sent in via OSPF. Good. Load
00:38:08 - balanced between the two IRO routers. So this is good. We've
00:38:13 - got that coming through now. Let's go back over to the original.
00:38:17 - BRO1. Let's do a "show ip route" on him. And look, he now has
00:38:22 - a default gateway, right there. It's probably being redistributed
00:38:27 - but that's OK. Yes, external route. OK. So where were we? Let's
00:38:33 - now... I'm just going to go for gold here. Let's see
00:38:37 - if we can oups, dragging the wrong window see if we can
00:38:45 - ping this now. Man! Why do
00:38:48 - you not work? laugh Oh, you work! Yes, I love it! I love it!
00:38:53 - I am so glad 'cause totally by instinct, I would just press Control,
00:38:57 - see right there and troubleshoot my brains out. I'm so glad I
00:39:00 - took the moment away. Sometimes, the first thing fails simply
00:39:03 - of ARPA timed out, or whatever. Who knows why, but... Awesome.
00:39:08 - OK, that was good. Good scenario. So we've got now Server 1 ping
00:39:14 - able to reach isp3.tshoot.local, again, it saying browse but
00:39:20 - if I
00:39:22 - can ping it. I guess we can try and browse. It's just...if that
00:39:26 - doesn't work, we can just turn it over to the application guys.
00:39:31 - Because if I can ping it, my job
00:39:35 - here is done! And because I am on a virtual machine that's running
00:39:39 - with a 386 processor. Alright, so.., come on, come
00:39:46 - on...you can
00:39:56 - get there.
00:40:01 - http://isp3.tshoot.local. Beautiful! Welcome to the server in
00:40:05 - the Internet. laugh Thank you Nil. OK. So good. We are good with
00:40:10 - scenario one. Good grief, that took a little while. But that's
00:40:12 - alright. That was good. That was a lot of good stuff in there.
00:40:15 - Let's do a little debrief. What we've seen here is we have seen
00:40:20 - the Client 2 access failure with first off, an issue with redistribution
00:40:25 - to where we did not specify a seed metric for OSPF and EIGRP.
00:40:31 - So EIGRP routes come in with that default metric of infinity
00:40:35 - and so, are not accepted by the internal routers. Likewise, we
00:40:39 - did not add that subnets keyword, the other direction. So the
00:40:44 - OSPF router rejected the IEGRP summarized up because it said
00:40:47 - again, you are conflicting with a lot of my subnet mass coming
00:40:52 - in. IEGRP routes were not seen and so that resolves at least
00:40:57 - the one server connectivity issue. The Internet connectivity
00:41:01 - though was an interesting one because, again, just looking at
00:41:05 - the neighbor relationships forming, they shouldn't have been
00:41:07 - that way and there were mysterious IP addresses. But once we
00:41:10 - diagrammed it all out, we saw that the CSW switches were using
00:41:15 - different timers than
00:41:20 - the IRO routers. So, once we adjusted the timer, everybody formed
00:41:23 - a nice happy family relationship and our Internet access was
00:41:26 - restored. Now, I am wondering... I am wondering if this is gonna
00:41:30 - bleed through some of our other tickets because I know some of
00:41:34 - the other tickets were, you know, I can't access the internet
00:41:36 - and things like that. But we'll see. We may have solved other
00:41:39 - problems, just at the get go. But we'll pick that up in the next
00:41:43 - Nuggets. For now, I hope this has been informative for you and
00:41:45 - I want to thank for viewing.

Route TSHOOT: OSPF and Route Redistribution, Part 2

Route TSHOOT: BGP Concept Review

Route TSHOOT: BGP

Route TSHOOT: Router Performance Issues Concept Review

Route TSHOOT: Router Performance Issues

Security TSHOOT: Access List Concept Review

Security TSHOOT: Access List Chaos

IPv6 TSHOOT: IPv6 and IPv6 Routing Protocols

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Jeremy Cioara

Jeremy Cioara

CBT Nuggets Trainer

Certifications:
Cisco CCNA, CCDA, CCNA Security, CCNA Voice, CCNP, CCSP, CCVP, CCDP, CCIE R&S; Amazon Web Services CSA; Microsoft MCP, MCSE, Novell CNA, CNE; CompTIA A+, Network+, iNet+

Area Of Expertise:
Cisco network administration and development. Author or coauthor of numerous books, including: CCNA Voice 640-461 Official Cert Guide; CCNA Voice Official Exam Certification Guide (640-460 IIUC); CCENT Exam Prep (Exam 640-822); CCNA Exam Cram (Exam 640-802) 3rd Edition; and CCNA Voice 640-461 Official Cert Guide.

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This advanced buffering is applied to all streams regardless if you installed the doublespeed control or not. Sometimes the advanced buffering causes the video to hang or behave erratically. If you are experienceing issues with video playback please disable the doublespeed buffer.

Remember to re-enable the buffer if you want to use the doublespeed control.

If you are experiencing problems with our content delivery, please click here to switch to our alternate content delivery network or go to our network FAQ.
For other common video playback issues, including firewall and corporate network issues, please visit our Tech Support forum.