I am trying to setup a Multisite Multihoming WAN configuration between two sites and three ISP's. I have two routers at site A both on different ISP's and a single router at site B on another ISP. I am able to control traffic at site A using a combination of local preference and AS prepending to send traffic to the router of my chosing. I have a similar configuration setup at site B also with local preference AS prepending, however the I cannot get the traffic to cooperate. Here is the current BGP configuration at site B.
router bgp as_number
no bgp enforce-first-as
network x.x.x.x mask 255.255.255.0
network y.y.y.y mask 255.255.255.0
neighbor z.z.z.z remote-as 32007
neighbor z.z.z.z ebgp-multihop 255
neighbor z.z.z.z send-community
neighbor z.z.z.z.z route-map as out
neighbor z.z.z.z.z remote-as remote_as
route-map as permit 10
match as-path 10
set as-path prepend as_number as_number as_number as_number as_number
What I am attempting to accomplish with this is the ability to be able to announce the prefix that I am currently using at Site A with Site B so that if I am unable to reach Site A for whatever reason the Prefix will fail over to Site B.
I have narrowed the issue down to the fact that despite the fact that I have configured the prefix at site A to be announced at site B it is actually not being announced due to the non-existence of the route in the routing table. I have tried to add an ip route x.x.x.x 255.255.255.0 null0 200 route but that seems to send all traffic destined for the x.x.x.x network to a black hole.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
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