[c-nsp] VLAN Trunking Question

[Jason Baugher]

The most likely cause is that the VLAN isn't configured on the switches.

show vlan
show int trunk


On Tue, Sep 10, 2013 at 4:25 PM, Joseph Mays <mays at win.net> wrote:

> 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
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