Re: Inexpensive software bgp router that supports route tags?

[Dan White <dwhite () olp net>]

On 07/01/15 15:47 -0400, David H wrote:
> Sorry I wasn't clear on that.  Traditionally on a hardware, e.g.
> cisco/brocade, router performing the RTBH role, I'd add blackhole routes by
> way of static routes with a particular tag; one tag for block this source,
> one tag for block this destination.  Redistribute static would let route
> maps operate against those tags to turn into bgp communities being applied
> to the announcements, and then the real routers can do what they need to
> do.  When I tried out Quagga/Zebra as an alternative, it doesn't work this
> way, so while it was nice that it could pick up static routes from the OS,
> or have them added manually just like a hardware router, there was no
> concept of the route tag getting to Zebra for it to do the rest of the work
> on the BGP side.

We're using Quagga to inject blackhole routes upstream, which can match
routes on the OS's metric value:

# IPv4 blackhole
~$ ip route add 203.0.113.42/32 dev lo metric 666

!
route-map map_bad_routes permit 10
match metric 666
set community xxxxx:yyy
...
!

--
Dan White