cisco ASR1001-X - Having two ports run same network on common VLAN

[anthonyg2879]

I have worked on lower end Cisco 1900 routers and it seems the syntax needed on the ASR1001-X is different.

Can someone provide some guidance on how to build the same network 16.0.0.1/24 on Ge0/0/0 and Ge0/0/1 under a common VLAN, so two firewalls can plug into router and be redundant of each other.

Thanks in advance,

[Philip D'Ath]

ASR's run IOS-XE, not IOS, so that is why they are a little different.

You'll need to use a BDI:

http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asr1000-software-config-guide/bdi-asr.html

For example, to bridge VLAN100 on two different ports you would use something like:

interface Gig0/0/0
   service instance 1 ethernet
     encapsulation dot1q 100
     bridge-domain 1
interface Gig0/0/1
   service instance 1 ethernet
     encapsulation dot1q 100
     bridge-domain 1
interface BDI1
   ip address x.x.x.x 

[JuergenW]

Does not work...

[Richard Burts]

Sorry that it did not work for you. The suggested solution looks appropriate to me. Can you tell us the specifics of what model router and what version of code you are running? And can you show us the specifics of what you configured and any error messages generated by that config change?

[Georg Pauwen]

Hello,

the only thing that I can think of that could be missing is the line in bold:

interface Gig0/0/0
service instance 1 ethernet
encapsulation dot1q 100
--> rewrite ingress tag pop 1 symmetric
bridge-domain 1

!
interface Gig0/0/1
service instance 1 ethernet
encapsulation dot1q 100
--> rewrite ingress tag pop 1 symmetric
bridge-domain 1

!
interface BDI1
ip address x.x.x.x