[c-nsp] VLAN Trunking Question

[Armir Goxhabelliu]

Hi.
I'd suggest(it is try and fail method) to use a wider range of IP(just for testing a /29 range will be OK at the end roll back to desired IP)  and use a laptop in each SW to see communication with each Router from SW to SW.


-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Aaron
Sent: Wednesday, September 11, 2013 10:14 PM
To: 'Joseph Mays'; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] VLAN Trunking Question

Joseph, Like Gert said, I would try this on cata, b, and c...

Cata...
Sh spanning int f0/1
Sh spanning int f0/10

Catb...
Sh spanning int f0/4
Sh spanning int f0/1

Cata...
Sh spanning int f0/17
Sh spanning int f0/1

See if vlan 808 is FWD on all those...

If so, I would then do this... 

Cisco 7206A (see what mac address is of 7206A.... then assuming ip of 7206B is 1.1.1.1...

Sh int vlan 808 | in bia
Ping 1.1.1.1 repeat 100000

Cata...(looking for that mac address of 7206a to show up here... and along the path) Sh mac- int f0/1

Catb...(looking for that mac address of 7206a to show up here... and along the path) Sh mac- int f0/4

Catc...(looking for that mac address of 7206a to show up here... and along the path) Sh mac- int f0/17

Show arp caches on both 7206's...

Repeat in opposite direction to see mac of 7206b being learned in transit bridge tables going back...

Hopefully by then you will have found the snag...

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

Aaron

p.s. perhaps you could also do that traceroute mac option... (I think you would get a bia address of 7206a and execute mac trace from CLI of cata using source mac of 7206a and dest mac of 7206b)


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