[j-nsp] BGP route-reflection question

Lars Erik Gullerud lerik at nolink.net
Fri May 30 13:54:35 EDT 2003

On Fri, 2003-05-30 at 03:45, 'Dmitri Kalintsev' wrote:
> C1 connects a few networks in quite an important LAN to the internet via
> RR1/RR2. iBGP is a requirement between the C1 and RR1/RR2 (there is another
> exit from this LAN, so static routing in from RR1/RR2 is not an option), and
> there is NO dynamic routing between RR1/RR2 and C1, nor it's a good idea to
> configure it (so presume - static routing ONLY plus iBGP). The C1 also talks
> to some other L3 switches in the Important_LAN via OSPF.

Well, as you correctly say, Lo0-Lo0 peering will not work in the setup
described here since C1 obviously does not know how to reach the
loopbacks of your RR's and vice versa. This whole setup of yours looks
fundamentally WEIRD though. :)

But still, if there is some really really good reason you cannot run an
IGP between these, then the solution still shouldn't more complicated
than using appropriate static routes on all the boxes, pointing at the
various loopbacks - and then floating the statics for the backup paths
using distance/preference.


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