[c-nsp] Configuring a cisco switch trunk port to allow dot1q and dot1ad frames
janardhan madabattula
janardhan632 at gmail.com
Sun Mar 11 21:26:44 EDT 2012
Hi,
I am trying to configure a cisco port (7600) as a trunk port to allow both
dot1q and dot1ad (ether type 88a8) frames. I tried following two configs
but both of them are not working. Any one can suggest me the right
configuration.
interface GigabitEthernet5/42
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2501-2503
switchport mode dot1q-tunnel
no cdp enable
spanning-tree bpdufilter enable
end
The above configuration is allows all dot1ad frames. I expect this port
should allow only 2501:* - 2503:*, instead it allows all *.* traffic.
======================
interface GigabitEthernet5/42
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2501-2503
switchport mode trunk
no cdp enable
spanning-tree bpdufilter enable
end
The abover configuration does not allow any dot1ad traffic . It just
allowing dot1q traffic with vlans 2501-2503. If I send 2501:1 it doesn't
go thru.
======================
My need is I should be able to send traffic over cisco port for dot1q
vlan 2501 and dot1ad vlan 2503:1 (outer tag 88a8). Pl suggest me.
Thanks,
Janardhan
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