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believewireless
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BGP Not Advertising other BGP Routes

Sat Oct 07, 2006 5:58 pm

We have redistribute connected, static and other BGP turned on for all routers. All routers are running Mikrotik 2.9.30 & 2.9.31. Same AS between three routers.

The middle router sees the route from one peer but isn't advertising it to the other:

/ip route print from [find gateway=6.2.52.89]
46 ADb 6.2.53.0/24 r 6.2.52.89 200 ether1

/routing bgp advertisements print 6.2.216.221
<Route isn't listed>

Any idea what is causing this behavior?
 
changeip
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Sat Oct 07, 2006 7:06 pm

Is it an active route on the middle router?

Sam
 
karyal
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Re: BGP Not Advertising other BGP Routes

Sat Oct 07, 2006 10:42 pm

We have redistribute connected, static and other BGP turned on for all routers. All routers are running Mikrotik 2.9.30 & 2.9.31. Same AS between three routers.

The middle router sees the route from one peer but isn't advertising it to the other:

/ip route print from [find gateway=6.2.52.89]
46 ADb 6.2.53.0/24 r 6.2.52.89 200 ether1

/routing bgp advertisements print 6.2.216.221
<Route isn't listed>

Any idea what is causing this behavior?
Did you try setting nexthop-choice=force-self on the peers configuration?

Bye,
Ricky
 
believewireless
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Sun Oct 08, 2006 8:25 am

force-self is on every peer. We have the following:

ISP1 -> MT 1 -> MT 2 -> MT3 -> ISP2

We are trying to get the route on MT1 to be announced by MT3 to ISP2. It's in /routing bgp network on MT1 and seen by MT2 but not announced to MT3.

All filters have been removed and it's still not being seen. Any ideas?
 
changeip
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Mon Oct 09, 2006 1:12 am

Is it an active route on the middle router?

Sam
repeat ... is it an active route on the middle router?

Sam
 
believewireless
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Mon Oct 09, 2006 2:34 am

Yes, I already showed that in the first post:

/ip route print from [find gateway=6.2.52.89]
46 ADb 6.2.53.0/24 r 6.2.52.89 200 ether1
 
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Eugene
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Fri Oct 13, 2006 4:21 pm

issue /routing bgp peer resend-all command and see if the route is being advertised afterwards. If it is not, send support output file to support@mikrotik.com

Eugene
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believewireless
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Sat Oct 14, 2006 1:56 am

It looks like the resend fixed it. Thanks.

I did notice a route today where that didn't fix it. I had to disable the peer and re-enable it for it to work.
 
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Eugene
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Fri Oct 20, 2006 2:07 pm

You have to report such cases accompanied by support-output files to support@mikrotik.com

Eugene
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