I trying to have all icomming traffic in from one IPS and the other as the fail over. I have all going out fine but incoming always uses the backup IPS which is a slower speed. What is missing?
router bgp 99999
neighbor 69.xx.xx.xx remote-as 1111
neighbor 69.xx.xx.xx ebgp-multihop 3
neighbor 69.xx.xx.xx timers 10 30
neighbor 69.xx.xx.xx filter-list 2 in
neighbor 69.xx.xx.xx filter-list 3 out
neighbor 69.xx.xx.xx weight 2000
neighbor 144.xx.xx.xx remote-as 2222
neighbor 144.xx.xx.xx description Backup ISP
neighbor 144.xx.xx.xx timers 10 30
neighbor 144.xx.xx.xx route-map prepend out
neighbor 144.xx.xx.xx filter-list 1 in
neighbor 144.xx.xx.xx filter-list 3 out
neighbor 144.xx.xx.xx weight 100
ip as-path access-list 1 permit ^2222_[0-9]*$
ip as-path access-list 2 permit ^1111_[0-9]*$
ip as-path access-list 3 permit ^$
route-map prepend permit 10
set as-path prepend 99999 99999 99999
Iam still waiting on my query from ISP regards to Route Dampening. But the ISPB (backup) do not support communitities...his reply..
"we are not currently offering community strings for BGP attributes. But if you want we can manually reduce the local preference of your prefixes on our access router."
Is it recomended to go with manual reduced Local pref on ISP end..?
Or work with ISP-A to advertise /25 & /25 instead of /24..?
My apologies about the Route Dampening update. You are mentioning Route Dampening from ISP-A (primary end).. is that correct...?
Becayuse on ISP-B end , we never bring down the link. Only on ISP-A end, for testing on HSRP, we pull the cable on orouter public interface. So ISP -A may be seeing the route failure, buu I believe, they are not dampening any routes, as when we put back the ISP_A cable, we have no issues in going online.
Only issues we have is... when I try to make ISP-B Active router (by pulling ISP-A public i/f cable) , then its taking 5-7 mins for the internet browseing to occur, even though ISP-B rtr takes the 'Active' role.
At this time, I think if IBGP is not needed between 2peers, then 'Synchronization' might be causing the issue.. not 100% sure though...
Any suggestions are appreciated.
Thank you in advacne
I was referring to BGP dampening on the back up ISP (ISP B). If this provider does use dampening, it could somehow cause the behavior you have seen.
The manual configuration of the local preference would do the job.
The issue with advertising a /25 to ISP A is that most SP on the Internet will filter out prefixes /25 or longer. ISP A might accept it but its upstream might not.
One provider is sending partial routes the other sending default routes.
1. Is this a problem?
2. What would be the best option , both default or both partial .(Hardware 3640 128 meg )
1. You may just end up sending more traffic on through the provider sending the partial. Not a problem if you do not reach the link capacity.
2. It depends on the providers but some of them will send you lots of routes even if they just send you partial routes. This could be a problem given that you only have 128MB of memory on this box. It also depends on what you are trying to achieve. Default from both providers may be just fine.