Verifying Ip Connectivity Within The Green Ipvpns - Avaya 8600 Technical Configuration Manual

the default route is 10.0.99.2 in the GRT.
Note that the underlying MLT will in any case hash traffic to both Site1 and Site2. So traffic destined for
the default route will be routed to Site2 but might actually get MLT hashed towards Site1 instead. Since
both Site1 and Site2 have the same CLIP#3 address and RSMLT is enabled on IP interfaces 10.0.99.1 &
10.0.99.2, Site1 can route traffic destined to Site2 and vice-versa. Thus providing active-active Internet
routing by both Site1 & Site2 as well as guaranteed sub-second failover times.
In general, when the same BGP Route appears more than once in the BGP routing
table with different Next Hop address (does not apply to this case since the Next Hop for
the default route are the same), the standard BGP Path selection criteria apply. For
VPNv4 routes, which are always learnt via IBGP and within the local AS, this simplifies
to the following set of criteria:

1. Prefer the path with the highest Weight
2. Prefer the path with the highest Local Preference
3. Prefer the path with the lowest IGP metric to the BGP next-hop
4. If ECMP is enabled insert up to 8 (with R-mode) paths into the IP routing table
5. Prefer the path with the lowest Router-ID

3.9 Verifying IP connectivity within the Green IPVPNs

Step 1 – Verify that each Site can reach each other Site
CLI/ACLI:
Site3:5# ping 10.1.10.1 vrf green source 10.1.30.1
Site3:5# ping 10.1.20.1 vrf green source 10.1.30.1
Site3:5# ping 10.1.40.1 vrf green source 10.1.30.1
Site3:5# ping 10.1.50.1 vrf green source 10.1.30.1
Result:
10.1.10.1 is alive
10.1.20.1 is alive
10.1.40.1 is alive
10.1.50.1 is alive
To perform a ping across an IPVPN the source VRF and Source IP must always be

specified. Indeed the ping Source IP option is only functional for IPVPN pings. As
Source IP always select a local IP interface belonging to the VRF; these can be viewed
with ―show ip interface vrf <vrf name>‖
Network Design Implementation to Provide L2 & L3 VPN Connectivity
November 2010
between Sites using SMLT and IPVPN-Lite for ERS 8600
Technical Configuration Guide
avaya.com
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