[c-nsp] VLAN Trunking Question

[Joseph Mays]

Okay, so I am trying to set up a single VLAN to go through a series of catalyst switches. What I need, effectively, is one long ethernet connection between two routers. I thought this should work but since it is not, clearly, I've fundamentally misunderstood something.


Cisco 7206A(vlan 808 subinterface)>>--<<(vlan trunk Fe0/1)CatalystA(vlan trunk FE0/10)>>-...
...-<<(vlan trunk FE0/4)CatalystB(vlan trunk FE0/1)>>--<<(vlan trunk FE0/17)CatalystC(vlan trunk FE0/1)>>-...
...-<<(vlan 808 subinterface)Cisco 7206B


The configs on each port, for the curious.

Cisco 7206 A

interface FastEthernet1/0.808
description HN-808 interconnect to armplc via sw1.armplc
encapsulation dot1Q 808
ip address 216.24.2.202 255.255.255.252

Catalyst A

interface FastEthernet0/1
description to gw1.armplc
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable

interface FastEthernet0/10
description Hatteras 1 - HN408-U
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable

Catalyst B

interface FastEthernet0/4
description HN-808 interconnect to Armory Place
switchport trunk encapsulation dot1q
switchport mode trunk

interface FastEthernet0/1
description 802.1q trunk to core-sw1.noc (Heyburn 911) FE0/17
load-interval 30
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk

Catalyst C

interface FastEthernet0/17
description 802.1q trunk to core-sw3.noc.win.net (in Heyburn 513) FastEthernet0/0
load-interval 30
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable

interface FastEthernet0/1
description 802.1q trunk to core-gw1.noc.win.net port FastEthernet0/0
load-interval 30
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable

Cisco 7206 B

interface FastEthernet0/0.808
description HN-808 interconnect to armplc via core-sw3
encapsulation dot1Q 808
ip address 216.24.2.201 255.255.255.252
no cdp enable