mendagen den 28 februari 2011 19.27.28 skrev fredrik danerklint: > mendagen den 28 februari 2011 15.15.21 skrev Claudio Jeker: > > On Mon, Feb 28, 2011 at 03:08:05PM +0100, fredrik danerklint wrote: > > > Hi! > > > > > > I need some help with an configuration of OpenBGP. > > > > > > I have four routers that is connected with p-2-p links between each > > > other: > > > > > > R1 <-> R2 <-> R3 <-> R4 > > > > > > I've only seen networks announced to the nearest router that it is > > > connected to. > > > > > > For example: R1 see R2 but R1 cannot see R3 etc.. > > > > > > There is no other router deamon running on the servers (ie no ospfd). > > > > > > I think this must be some basic error that I have made. > > > > > > The configuration files is very basic ie: no filter rules at all and > > > there is an "allow from any". > > > > > > All the routers have an uniq router id. All routers announce an uniq > > > network that the others don't have. > > > > If you use the same AS on all 4 routers then you need to full mesh the > > four routers (iBGP sessions). Another option would be to use the > > route-reflector support. This is how BGP works. > > Fair enough. > > I have now tested to use three different AS number on the routers so they > all act like eBGP in between them (I have in this test skipped router R4). > > Only router R2 sees everything. R1 see what R2 announce but not R3 and the > same is true for router R3 that it can't see what R1 announce. > > Still, it must be something obviously that I have missed with this > configuration for OpenBGP shall work in a configuration like this?
I did miss the "announce all" in the neighbour. Now it does work as eBGP in between. -- //fredan
