VLAN Issue

[Himesh]

Hi all,

I consilidated two switches into a stack. both have multiple VLANS and I'll give an example here;

 

sw1

vl 2, 3, 4

 

sw2

v 12, 3, 4, 5

 

I decided to re-use sw1 and keep the config and wiped sw2 and stacked.

So far so good.

After configuring the uplink trunk to allow vl's 12 and 5 this is what happens

vl5 works fine

vl12 picks up an IP address but can't go anwhere, can't ping the default gateway etc. It can ping other devices on the same switch stack.

So conclusion is DHCP is fine as it uses broadcast any vl traffic for vl12 isn't leaving the switch. I can't see any reason why

I've checked for relevant ACL's both on the edge switch and the core switch.

These are all Cisco switches.

 

Can anybody think of what I'm missing?