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Trouble getting my lab rack devices up.

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brittany1

brittany1

Technical User
Aug 17, 2007
12
US
I am having layer 2 problems I suppose. No response when entering show cdp nei on either side.

Im trying to connect 2610xm fa0/0 to 3550 fa0/1 (layer 2 only).

Both ports in no shut, speed and duplex match. also for both cdp run and cdp enable entered. Debug of cdp packets show each device sending but not receiving.

On the switch
Vlan is up up
Fa0/1 is up up

on the router
Fa0/0 is up up

Heres some captures .. and the configs

3550_1#sh cdp int fa0/1
FastEthernet0/1 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
3550_1#

R1#show cdp interface fa0/0
FastEthernet0/0 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
R1#

R1#show cdp traffic
CDP counters :
Total packets output: 168, Input: 0
Hdr syntax: 0, Chksum error: 0, Encaps failed: 0
No memory: 0, Invalid packet: 0, Fragmented: 0
CDP version 1 advertisements output: 0, Input: 0
CDP version 2 advertisements output: 168, Input: 0
R1#

3550_1#show cdp traffic
CDP counters :
Total packets output: 178, Input: 0
Hdr syntax: 0, Chksum error: 0, Encaps failed: 0
No memory: 0, Invalid packet: 0, Fragmented: 0
CDP version 1 advertisements output: 0, Input: 0
CDP version 2 advertisements output: 178, Input: 0
3550_1#

3550_1#term len 0
3550_1#sh run
Building configuration...

Current configuration : 3804 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname 3550_1
!
no logging buffered
enable secret 5 $1$YVCl$zrnwDW1XCNvB5hImIfgQo.
enable password cisco
!
ip subnet-zero
!
no ip domain-lookup
ip ssh time-out 120
ip ssh authentication-retries 3
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
!
!
interface FastEthernet0/1
switchport mode access
!
interface FastEthernet0/2
switchport mode dynamic desirable
!
interface FastEthernet0/3
switchport mode dynamic desirable
!
interface FastEthernet0/4
switchport mode dynamic desirable
!
interface FastEthernet0/5
switchport mode dynamic desirable
!
interface FastEthernet0/6
switchport mode dynamic desirable
!
interface FastEthernet0/7
switchport mode dynamic desirable
!
interface FastEthernet0/8
switchport mode dynamic desirable
!
interface FastEthernet0/9
switchport mode dynamic desirable
!
interface FastEthernet0/10
switchport mode dynamic desirable
!
interface FastEthernet0/11
switchport mode dynamic desirable
!
interface FastEthernet0/12
switchport mode dynamic desirable
!
interface FastEthernet0/13
switchport mode dynamic desirable
!
interface FastEthernet0/14
switchport mode dynamic desirable
!
interface FastEthernet0/15
switchport mode dynamic desirable
!
interface FastEthernet0/16
switchport mode dynamic desirable
!
interface FastEthernet0/17
switchport mode dynamic desirable
!
interface FastEthernet0/18
switchport mode dynamic desirable
!
interface FastEthernet0/19
switchport mode dynamic desirable
!
interface FastEthernet0/20
switchport mode dynamic desirable
!
interface FastEthernet0/21
switchport mode dynamic desirable
!
interface FastEthernet0/22
switchport mode dynamic desirable
!
interface FastEthernet0/23
switchport mode dynamic desirable
!
interface FastEthernet0/24
switchport mode dynamic desirable
!
interface FastEthernet0/25
switchport mode dynamic desirable
!
interface FastEthernet0/26
switchport mode dynamic desirable
!
interface FastEthernet0/27
switchport mode dynamic desirable
!
interface FastEthernet0/28
switchport mode dynamic desirable
!
interface FastEthernet0/29
switchport mode dynamic desirable
!
interface FastEthernet0/30
switchport mode dynamic desirable
!
interface FastEthernet0/31
switchport mode dynamic desirable
!
interface FastEthernet0/32
switchport mode dynamic desirable
!
interface FastEthernet0/33
switchport mode dynamic desirable
!
interface FastEthernet0/34
switchport mode dynamic desirable
!
interface FastEthernet0/35
switchport mode dynamic desirable
!
interface FastEthernet0/36
switchport mode dynamic desirable
!
interface FastEthernet0/37
switchport mode dynamic desirable
!
interface FastEthernet0/38
switchport mode dynamic desirable
!
interface FastEthernet0/39
switchport mode dynamic desirable
!
interface FastEthernet0/40
switchport mode dynamic desirable
!
interface FastEthernet0/41
switchport mode dynamic desirable
!
interface FastEthernet0/42
switchport mode dynamic desirable
!
interface FastEthernet0/43
switchport mode dynamic desirable
!
interface FastEthernet0/44
switchport mode dynamic desirable
!
interface FastEthernet0/45
switchport mode dynamic desirable
!
interface FastEthernet0/46
switchport mode dynamic desirable
!
interface FastEthernet0/47
switchport mode dynamic desirable
!
interface FastEthernet0/48
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
switchport mode dynamic desirable
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
ip address 192.168.10.3 255.255.255.192
no ip route-cache
!
ip default-gateway 192.168.10.1
ip classless
ip http server
!
!
line con 0
line vty 0 4
password cisco
login
line vty 5 15
login
!
!
end
3550_1#

//////////////////////////////////////////////

R1#term len 0
R1#show run
Building configuration...

Current configuration : 834 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$FuyJ$wcsePMSmZQSE5rBUIaPfV0
enable password cisco
!
no network-clock-participate slot 1
no network-clock-participate wic 0
no aaa new-model
ip subnet-zero
ip cef
!
!
no ip domain lookup
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.10.1 255.255.255.192
duplex auto
speed auto
!
interface Serial0/0
description Serial link to R2 router
ip address 192.168.1.1 255.255.255.252
no fair-queue
!
interface Serial0/1
description Serial link to R3 router
ip address 192.168.2.1 255.255.255.252
!
ip http server
ip classless
!
!
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
line vty 0 4
password cisco
login
!
!
end
R1#

Any ideas ?
 
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But then I don't think you'd get "up" interfaces if that were the problem.

Maybe it's as simple as a dodgy cable - what does "show int" tell you?
 
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I swapped the cable already with a know good one. Pulled it from a different lab segment 2610xm and 2950. That connection is working fine. I suppose I could try that.

Im also connecting fa0/43 with yet another known good cable to a known good router fa interface.
 
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