Design Guide

0 to 2.
So in a E-Tree based deployment all the root EFPs
are put in one split-horizon group and the Root is
put in another split-horizon group. So all the leafs
communicate with Root and not with each other.
The option “split-horizon group” enables split-
horizon on EFPs.
The concept of split-horizon groups are a
different in CISCO ASR 9000.
! 3 Split Horizon groups are defined in
CISCO ASR 9000
! Group 0 is default.
! Group 1 – Any PW configured under
the “vfi”
! Group 2 – Any AC configured with
“split-horizon” keyword.
By configuring Split-horizon option on an EFP,
split-horizon is enabled by pushing the EFP to
a Group 2 from default Group 0.
VPLS using BGP auto discovery
CISCO ME3600X/3800X and CISCO ASR 903 Configuration
router bgp 3
bgp router-id 121.0.1.1
bgp log-neighbor-changes
no bgp default ipv4-unicast
neighbor 11.1.1.1 remote-as 3
!
address-family ipv4
neighbor 11.1.1.1 activate
!
address-family l2vpn vpls
neighbor 11.1.1.1 activate
neighbor 11.1.1.1 send-community both
neighbor 11.1.1.1 prefix-length-size 2
!
l2 vfi POD1 autodiscovery
vpn id 100
bridge-domain 100
NOTE : The command neighbor 11.1.1.1 prefix-length-size 2 is required to interoperate with
Cisco ASR 9000