On 06/03/2015 05:35, Mark Tinka wrote: >> > You just need to make sure you never mess up the route-map used for SD. > If you want to be simple, a simple "route-map BLAH deny 10" is all you > need to have nothing installed in the FIB.
This will cause traffic to go north-south on your network in situations where it might be more efficiently handled as east-west. Depending on the network structure, this might not be a problem, e.g. if the me3600 is a strict PE / distribution device. If there are any east-west connections, deny-all on bgp won't work well. Obviously this assumes that ibgp is being used as igp, with isis/ospf as strict topology engine only. If you're using a link state protocol for connected / static prefix distribution (urgh), east-west traffic will stay that way. But then we wouldn't be having this conversation. Otherwise, Adam is correct to say that using selective download shifts the problem space from one route-map to another. Ultimately you still need to be careful. Dropping a spanner into the cogs nearly always causes damage, no matter what the situation. Nick _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
