Hello Ghassan,

just to make sure: is the encapsulation set to 802.1q on the ME3400? Afaik it does still support ISL. You might want to share "sh int x/x capa" on both sides and maybe also the interface's config. Also, is there anything
in between the switches that could cause some interference or are they
directly connected back-to-back?

Cheers
Sascha

On Sun, 30 Oct 2011, Ghassan.khalil wrote:

Dears,
I have 3400-me connected to a 2960 switch with interface vlan on each of them.
When configuring the link as access port on vlan 891 the interface vlan can 
reach each other.
But when configuring the link as trunk port with allowed vlan 891 the interface 
vlan stays up-up but the interface vlan can not ping each other.
Did anyone face this kind of problems with 3400-me or 2960 ?



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