09-21-2009 10:54 PM - edited 03-06-2019 07:49 AM
Hello.
I've got a 10GE trunk interface from our partner. One vlan (id 1149) that comes on this port is a q-in-q vlan carring four inner vlans. How can I extract them?
Current interface configuration:
interface TenGigabitEthernet3/4
description XXXXXXX
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1140-1150
switchport mode trunk
09-21-2009 11:47 PM
Hi,
I am not sure I understand exactly.
But if you are receiving double tag traffic with 1149 as outer dot1q and let's say vlan x,y and z as inner vlan.
You need to select one output port to which you will send the traffic.
If this port is on a regular lan line card (any Ws-X67xx) for example you can configure that port as Dot1q tunnel port :
interface gig 1/1
description XXXXXXX
switchport
switchport mode dot1q-tunnel
switchport mode access vlan 1049
--> with that config we will remove vlan 1049 from each packet incoming on the ten gig int with vlan 1049 and sends only the inner vlan out on gig 1/1 for example.
config guide for dot1q tunneling is at : http://www.cisco.com/en/US/partner/docs/routers/7600/ios/12.2SR/configuration/guide/dot1qtnl.html
If your egress line card would be an Es-20, Es+ or sip-400, you may do the same with EVC config using service instances. Some info on service instance can be found in :
Roland
09-22-2009 02:14 AM
Hi Roland,
Yes vlan 1149 used as outer dot1q and vlan 143,156,841 as inner vlan.
In my setup there's no ES20 card, so I have to follow your sugesstion with the output port. Thanks for configuration example!
Is there any possiblity to remove the outer dot1q vlan on 7600's SVI?
09-22-2009 05:18 AM
09-22-2009 05:36 AM
hi,
No on SVI on 7600 you cannot do that.
Actually you cannot even route a double tagged packet on an SVI.
if you only have LAN line card I fear you are limited to the dot1q tunnel access port.
Roladn
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