BGP Add-Path might be your friend . You can look at diverse-path as well . Sent from my iPhone
> On Aug 24, 2015, at 2:07 PM, Mohamed Kamal <mka...@noor.net> wrote: > > Hi, > > I have a classic network design with 3 gateways, each receive a default route > from different upstream provider. Each gateway has a BGP session with a > route-reflector, which in turns reflects the best BGP route to the other PE > routers in the network. The route-reflectors are running the SRE train > (12.2(33)SRE1) and here exist the problem. > > I need to leak all the default routes (3 default routes) from the gateways > into the PE routers. I have done this via bgp advertise-best-external on the > gateways. So far, the default routes exist on the route-reflector, however > it's suppressed as the RR will only send the best path. > > I have configured bgp advertise-best-external also on the RR but it didn't > work, because the RR didn't see that the different default routes received > are of "external" type. Cisco didn't state that clearly and it only stated > that bgp best external feature won't work on the RR unless you get an ASR > loaded with an IOS-XE 3.4 or later! > > Anyhow, do anyone here has a suggestion of how to get this done without > replacing my RR sticking to this classical network design? > > Thanks. > > -- > Mohamed Kamal > Core Network Sr. Engineer >
