Verifying Bgp Ipvpn Routes For Green Vrfs - Avaya 8600 Technical Configuration Manual

Total bgp neighbors: 4

3.7 Verifying BGP IPVPN Routes for Green VRFs

IPVPN Routes between the VRFs are advertised by BGP as VPNv4 routes.
A VPNv4 route is simply an VRF IPv4 route which has been pre-pended with the RD of the advertising
VRF.
Hence one of the two purposes of the RD defined in sections 2.2.8.2 & 2.2.9.2 is to render the IPv4
routes from different VRFs (which might overlap and be the same) unique to BGP.
These VPNv4 Routes, from all VRFs, are then advertised by a single instance of BGP which is operating
in the GRT. When BGP advertises these VPNv4 Routes it will also associate them with a BGP Extended
Community which will contain all of the Export RTs defined on the advertising VRF.
At the receiving end, when these VPNv4 Routes are learnt, the RT values contained in the Extended
Community of the BGP Update, are matched against the Import RTs defined for the local VRFs. If there is
a match, then the VPNv4 Routes will be accepted into dedicated BGP table space for the VRF.
The first step is therefore to check what are the Import RTs defined for the VRF and then to look at the
BGP learnt VPNv4 Routes.
Step 1 – Verify the import RTs defined on the Green VRF
CLI: Site3:5# show ip vrf ipvpn rt vrf green
ACLI: Site3:5# show ip ipvpn route-target vrf green
Result:
================================================================================
================================================================================
VRF RT
NAME TYPE
--------------------------------------------------------------------------------
green AS NUM
green AS NUM
green AS NUM
green AS NUM
Comments:
Hence the Green VRF will accept VPNv4 Routes with either an RT of 65000:60010 or 65000:60000
Network Design Implementation to Provide L2 & L3 VPN Connectivity
November 2010
route-advertisement-interval - 5
route-reflector-client - disable
send-community - disable
soft-reconfiguration-in - enable
updt-source-interface - 10.0.0.1
Route Policy In -
Route Policy Out -
address-family vpnv4 - enable
ipvpn-lite-capability - enable
route-refresh - enable
negotiated-session-capabilites - vpnv4 ipvpn-lite route-refresh
IP Route-Target
RT
VALUE
65000
65000
65000
65000
between Sites using SMLT and IPVPN-Lite for ERS 8600
Technical Configuration Guide
weight - 100
ASSIGNED IMPORT
NUMBER /EXPORT
60010 IMPORT
60000 IMPORT
60010 EXPORT
60001 EXPORT
avaya.com
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