Any Cisco experts? Little help please

tommytinkle · 15 Nov 2010 at 15:36

Hey!

Am doing an assignment and currently am getting somewhere with cross network conenctivity but I'm having a problem whereby my router is still routing packets via a serial interface instead of a high speed backbone connection.

We're using ospf but I can't figure out why its going via the serial link instead of across the core network.

Any suggestions would be appreciated

Thanks guys

J.B · 15 Nov 2010 at 15:41

What does the routing table look like?

tommytinkle · 15 Nov 2010 at 15:48

Hey,

Code:

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/25 is subnetted, 3 subnets
C       10.1.1.0 is directly connected, FastEthernet0/1.10
C       10.1.1.128 is directly connected, FastEthernet0/1.20
C       10.1.2.0 is directly connected, FastEthernet0/1.30
     192.168.1.0/30 is subnetted, 2 subnets
C       192.168.1.0 is directly connected, Serial0/3/1
C       192.168.1.4 is directly connected, Serial0/3/0
C    192.168.100.0/24 is directly connected, FastEthernet0/0

The problem is, its not showing me any routes via the backbone connections to get to the other side of the network and fa0/0 isn't even shown in the list which is what I find bizzarre, as that is my link to the core network.

tommytinkle · 15 Nov 2010 at 15:50

Code:

     10.0.0.0/25 is subnetted, 4 subnets
C       10.1.1.0 is directly connected, FastEthernet0/1.10
C       10.1.1.128 is directly connected, FastEthernet0/1.20
C       10.1.2.0 is directly connected, FastEthernet0/1.30
O       10.1.4.0 [110/65] via 192.168.1.2, 00:02:28, Serial0/3/1
     192.168.1.0/30 is subnetted, 3 subnets
C       192.168.1.0 is directly connected, Serial0/3/1
C       192.168.1.4 is directly connected, Serial0/3/0
O       192.168.1.8 [110/128] via 192.168.1.2, 00:02:28, Serial0/3/1
                    [110/128] via 192.168.1.6, 00:02:28, Serial0/3/0
C    192.168.100.0/24 is directly connected, FastEthernet0/0

Using

Code:

router ospf 1
network 192.168.100.0 255.255.255.0 area 0

Produces the output above, but I want it to learn that it can go across the backbone to get to the other side, so I'm not sure what I'm doing wrong

GhostlyPea · 15 Nov 2010 at 16:29

Have you set your bandwidth command correctly on the interfaces and are they up/up? Can you post a full show run?

- Pea0n

tommytinkle · 15 Nov 2010 at 16:46

Hey mate,

This may be my problem, I haven't set a bandwidth command at all!

Code:

Cam#show run
Building configuration...

Current configuration : 1382 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Cam
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
ip name-server 0.0.0.0
interface FastEthernet0/0
 ip address 192.168.100.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/1.10
 encapsulation dot1Q 10
 ip address 10.1.1.1 255.255.255.128
!
interface FastEthernet0/1.20
 encapsulation dot1Q 20
 ip address 10.1.1.129 255.255.255.128
!
interface FastEthernet0/1.30
 encapsulation dot1Q 30
 ip address 10.1.2.1 255.255.255.128
!
interface Serial0/3/0
 ip address 192.168.1.5 255.255.255.252
 clock rate 64000
!
interface Serial0/3/1
 ip address 192.168.1.1 255.255.255.252
 clock rate 64000
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.0 0.0.0.127 area 0
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.0 0.0.0.7 area 0
 network 192.168.100.0 0.0.0.255 area 0
 network 10.1.0.0 0.0.0.127 area 0
 network 10.1.4.0 0.0.0.127 area 0
 default-information originate
!
ip classless
!
!
!
no cdp run
!
banner motd ^C ***Cam***        ***** Authorised Access Only *****^C
!
!
!
!
line con 0
 password password
 login
line vty 0 4
 password password
 login
!
!
!
end

GhostlyPea · 15 Nov 2010 at 16:50

It doesnt set the link speed but it is used in the metric calculation. There are other factors so it may not be that. What is the destination network your aiming to get to?

- Pea0n

tommytinkle · 15 Nov 2010 at 16:55

Hey mate,

If I pick one of the destination vlans then its 10.1.5.1 for example for a ping request.

I can ping from vlan a which is 10.1.1.2 host ip. This will ping router 2 which interface ip is 192.168.1.2 . What it won't do is ping 10.1.5.1 which is where I'm completely stumped!

GhostlyPea · 15 Nov 2010 at 17:03

So you're trying to ping 10.1.5.1 FROM the router? It doesnt seem to have a route there. Got a topology diagram?

- Pea0n

tommytinkle · 15 Nov 2010 at 17:07

Hey

My links are green where they should be now by the way, just so happens I screenshot that when I was first building it to write down addresses on paper!

GhostlyPea · 15 Nov 2010 at 17:14

OK so you're going from Cam router tooooo anywhere else? Can you mark which LAN is which? I know you say the links are all up butthe links to the switches are down and theres no route to the 10.1.5.0/25 network there.

are you able to upload the .pkt file or label tyhat diagram? all i see there is lack of routing information. if all the lites are green anot not red and STP is in effect then it seems some of your routes arent being sent into the routingtable on the relevant router, or your not distributing it via OSPF. Cna you upload the .pkt?

- Pea0n

tommytinkle · 15 Nov 2010 at 17:22

Hey Mate,

If your trust email address is correct, I'll send you the pka file?

Cheers

GhostlyPea · 15 Nov 2010 at 17:24

Yeah sure bung it through mater, won't be home until 6pm though but I'll check it as soon as I'm in

- Pea0n

tommytinkle · 15 Nov 2010 at 20:22

Hey,

Sent mate hopefully you received it

GhostlyPea · 15 Nov 2010 at 20:35

Received it but it won't open >.<

What version are you using?

- Pea0n

tommytinkle · 15 Nov 2010 at 20:37

Hey dude,

5.3.1

GhostlyPea · 15 Nov 2010 at 20:43

Ahhhh a lot newer than mine, I only have 5.1 >.<

Never mind - can you just do a show run on the other 2 routers?

- Pea0n

tommytinkle · 15 Nov 2010 at 20:57

Hey,

Can when I get home, won't be too long will paste it here!

SoundsGood · 15 Nov 2010 at 21:43

Upload the pkt tracer file to megaupload.com

tommytinkle · 15 Nov 2010 at 21:57

Hey,

Heres the code from the two routers -

Code:

sal#show run
Building configuration...

Current configuration : 1317 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname sal
!
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.100.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/1.70
 encapsulation dot1Q 70
 ip address 10.1.4.1 255.255.255.128
!
interface FastEthernet0/1.80
 encapsulation dot1Q 80
 ip address 10.1.4.129 255.255.255.128
!
interface FastEthernet0/1.90
 encapsulation dot1Q 90
 ip address 10.1.5.1 255.255.255.128
!
interface Serial0/3/0
 ip address 192.168.1.2 255.255.255.252
!
interface Serial0/3/1
 ip address 192.168.1.10 255.255.255.252
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 log-adjacency-changes
 network 10.1.1.0 0.0.0.127 area 0
 network 192.168.100.0 0.0.0.255 area 0
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.0 0.0.0.7 area 0
 network 192.168.1.0 0.0.0.255 area 0
 network 10.1.0.0 0.0.0.127 area 0
 network 10.1.4.0 0.0.0.127 area 0
!
ip classless
!
!
!
no cdp run
!
banner motd ^****Sal***        ***** Authorised Access Only **^C
!
!
!
!
line con 0
 password password
 login
line vty 0 4
 password password
 login
!

Code:

St#show run
Building configuration...

Current configuration : 1347 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname St
!
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.100.3 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/1.40
 encapsulation dot1Q 40
 ip address 10.1.2.129 255.255.255.128
!
interface FastEthernet0/1.50
 encapsulation dot1Q 50
 ip address 10.1.3.1 255.255.255.128
!
interface FastEthernet0/1.60
 encapsulation dot1Q 60
 ip address 10.1.3.129 255.255.255.128
!
interface Serial0/3/0
 ip address 192.168.1.6 255.255.255.252
!
interface Serial0/3/1
 ip address 192.168.1.9 255.255.255.252
 clock rate 64000
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 log-adjacency-changes
 network 192.168.100.0 0.0.0.255 area 0
 network 10.1.1.0 0.0.0.127 area 0
 network 192.168.1.0 0.0.0.3 area 0
 network 192.168.1.0 0.0.0.7 area 0
 network 192.168.1.0 0.0.0.255 area 0
 network 10.1.0.0 0.0.0.127 area 0
 network 10.1.4.0 0.0.0.127 area 0
!
ip classless
!
!
!
no cdp run
!
banner motd ^****St***        ***** Authorised Access Only **
banner motd ^C
!
!
!
!
line con 0
 password password
 login
line vty 0 4
 password password
 login
!
!
!
end