ASR 920 Subinterface dot1.q

[Raimund Schimanovits]

I cannot add a subinterface on a port-channel on a asr920

I want to double tag vlan on an interface for my connection to my client. The LACP works fine but now i need double vlans on this interface.

How does this work on ASR???

interface Port-channel1.1
encapsulation dot1q 10 second-dot1q 8
ip address 10.7.7.2 255.255.255.0

interface Port-channel1
description *****  A1 ******
no ip address
no negotiation auto
!
interface GigabitEthernet0/0/0
no ip address
no negotiation auto
channel-group 1 mode active
!
interface GigabitEthernet0/0/1
no ip address
no negotiation auto
channel-group 1 mode active

[Fredrik Lönnman]

The ASR 920 uses the EVC framework for this kind of termination. Please have a look at https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/ce/b_ce_xe-313s-asr920-book/b_ce_xe-313s-asr920-book_chapter_01.html

For this specific scenario, something like this would work:

interface Port-channel1
no ip address
no negotiation auto
service instance 1 ethernet
encapsulation dot1q 10 second-dot1q 8
rewrite ingress tag pop 2 symmetric
bridge-domain 1
!
interface BVI 1
ip address 10.7.7.2 255.255.255.0
end

[Raimund Schimanovits]

I cannto add the bvI interface. i got this message

Bridge group 1 is not configured

I think there is something missing?

best regards

[Deepak Kumar]

Hi,

The sub-interface behavior shall be achieved by creating service instances/BDIs under the physical interfaces as below.

interface Port-channel1.1

service instance 1 ethernet
encapsulation dot1q 10
rewrite ingress tag pop 1 symmetric
bridge-domain 10
end

!
interface BDI 10
ip address 192.168.1.1 255.255.255.0
end

https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/ce/b_ce_xe-313s-asr920-book/b_ce_xe-313s-asr920-book_chapter_01100.html

Regards,

Deepak Kumar

[Raimund Schimanovits]

i cannot add a subinterface on port-channel 

interface port-channel1.1
^
% Invalid input detected at '^' marker.

best regards

[Michalis Milaitis · Accepted solution]

Hello Raimund,

In ASR920 the keywork for L3 bridge domain interface is "BDI". So try this please :

interface Port-channel1
no ip address
no negotiation auto
service instance 1 ethernet
encapsulation dot1q 10 second-dot1q 8
rewrite ingress tag pop 2 symmetric
bridge-domain 1
!
interface BDI 1
ip address 10.7.7.2 255.255.255.0
end

Best Regards,

Michalis 

[Raimund Schimanovits]

Thanks it works fine 

Best regards