wha't the benefit of using BVI on ASR9001

eric.guo · ‎05-02-2017

Hi All,

I am new of my current workplace, and saw that we setup one single logical BVI interface with multiple IP address for different Internal network segment IP connection on our Asr9001 nV edge router. Sample configuration is showing below.

I am wondering whom could explain to me what's the benefit for this kind of setup by compared with different network segment setup their own IP address with the BuETH or Physical interface?

interface BVI10
description Internal_Interface
ipv4 address x.x.x.1 255.255.255.0
ipv4 address y.y.y.1 255.255.255.192 secondary
ipv4 address z.z.z.1 255.255.255.0 secondary

l2vpn
load-balancing flow src-dst-ip
bridge group INTERNAL_BG
bridge-domain INT
   interface Bundle-Ether10
   !
   interface Bundle-Ether20
   !
   interface TenGigE0/0/0/0
   !
   interface TenGigE0/0/0/1
   !
   interface TenGigE0/0/2/2
   !
   interface TenGigE1/0/0/0
   !
   interface TenGigE1/0/0/1
   !
   interface TenGigE1/0/2/2
   !
   interface GigabitEthernet0/0/1/0
   !
   interface GigabitEthernet0/0/1/1
   !
   interface GigabitEthernet0/0/1/2
   !
   interface GigabitEthernet0/0/1/3
   !
   interface GigabitEthernet1/0/1/0
   !
   interface GigabitEthernet1/0/1/3
   !
   interface GigabitEthernet1/0/1/16
   !
   interface GigabitEthernet1/0/1/17
   !
   interface GigabitEthernet1/0/1/18
   !
   interface GigabitEthernet1/0/1/19
   !
   routed interface BVI10
!
!
!

thanks,

Eric

joselgo2 · ‎05-09-2017

Hello Eric.

Answering your question a BVI (Bridge group Virtual Interface) it is use to create a layer 2 conection between the routers, if you want more especific information in this link you can read all about it http://www.cisco.com/c/en/us/support/docs/lan-switching/integrated-routing-bridging-irb/200650-Understanding-Bridge-Virtual-Interface.html , and in your case i think you need send all the traffic over de BVI using a single physical interface such as many virtual interfaces taking advantage of the bandwith.

greetings!