Can you check whether you are getting the advertisement of your IP pools from both ISP. pls check from any route server.
On Mon, Feb 13, 2012 at 8:50 PM, Chuck Church <[email protected]> wrote: > And to add, has it ever worked? If you administratively shut one neighbor, > does the remaining neighbor work correctly eventually? If one or both ISPs > aren't routing your traffic, all bets are off. Is this a lab, seeing as > how all the IP space is either 1918 or bogus-looking addresses? > > Chuck > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Keegan Holley > Sent: Monday, February 13, 2012 9:59 AM > To: alex nyagah > Cc: [email protected] > Subject: Re: [c-nsp] Internet BGP autofailover > > what do you mean by "isn't working". No routes, traceroute dies, routes > but > no traffic, only a subset of the destinations are reachable,etc.. > > 2012/2/13 alex nyagah <[email protected]> > > > Hi Group, > > I have the following configs in my router but auto failover between > > two ISP is not working, can someone please help.. > > > > > > interface GigabitEthernet0/1 > > description Link to ISP_A > > ip address 10.10.10.205 255.255.255.252 ip accounting output-packets > > ip flow ingress ip nbar protocol-discovery duplex auto speed auto > > no negotiation auto ! > > interface GigabitEthernet0/2 > > description Connection to ISP_2 > > ip address 20.20.20.34 255.255.255.252 ip accounting output-packets > > ip flow ingress ip nbar protocol-discovery load-interval 30 duplex > > auto speed auto no negotiation auto ! > > interface GigabitEthernet0/3 > > description Connection to WALTER LAN > > ip address 10.20.30.254 255.255.255.0 ip tcp adjust-mss 1420 duplex > > auto speed auto no negotiation auto ! > > router bgp 6450 > > bgp log-neighbor-changes > > neighbor 20.20.20.33 remote-as 31177 > > neighbor 20.20.20.33 description ISP_A-BGP neighbor 20.20.20.33 > > ebgp-multihop 8 neighbor 20.20.20.33 update-source GigabitEthernet0/2 > > neighbor 10.10.10.206 remote-as 9010 neighbor 10.10.10.206 > > description ISP_A-Ke-eBGP neighbor 10.10.10.206 update-source > > GigabitEthernet0/1 maximum-paths 2 ! > > address-family ipv4 > > neighbor 20.20.20.33 activate > > neighbor 20.20.20.33 weight 1000 > > neighbor 20.20.20.33 prefix-list WALTER-SUBNET out neighbor > > 20.20.20.33 route-map ISP_B_IMPORT in neighbor 10.10.10.206 activate > > neighbor 10.10.10.206 weight 100 neighbor 10.10.10.206 prefix-list > > WALTER-SUBNET out neighbor 10.10.10.206 route-map prepending in > > maximum-paths 2 no auto-summary no synchronization network > > 10.20.30.0 mask 255.255.255.0 exit-address-family ! > > ip route 10.20.30.0 255.255.255.0 Null0 254 name BGP-Advertisement ip > > flow-export source GigabitEthernet0/1 ip flow-export version 5 > > origin-as ! > > no ip http server > > ! > > ! > > ! > > ip prefix-list DEFAULT seq 10 permit 0.0.0.0/0 ! > > ip prefix-list WALTER-SUBNET seq 5 permit 10.20.30.0/24 ip prefix-list > > WALTER-SUBNET seq 10 deny 0.0.0.0/0 le 32 ! > > route-map ISP_B_IMPORT permit 10 > > match ip address prefix-list DEFAULT > > ! > > route-map prepending permit 10 > > match ip address prefix-list DEFAULT > > > > -- > > ** > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > -- Cheers ! Z a h i D K h a n +91 9818635702 _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
