Check out BGP conditional advertisement. HTH, Scott
""sam sneed"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I have a pair of 2621's and 2 reduandant ethernet handoffs to my ISP. 1 is a > primary and the other is a backup which should only be used if the primary > fails. On my side i am running HSRP for fault tolerance RA is configured > asprimary in my HSRP group. I will be doing BGP peering with my provider. I > only want to receive default routes. I almost have the full config but am > confused on 1point. If ISPA goes loses connectivity a couple hops upstream > HSRP will not fail over becasue my link is physically up so all my internal > hosts will still go through RA eth0. How do I get them to go through RA eth0 > then to RB eth0 and then eventually through the backup ISP link, ISP B. Keep > in mind its the same ISP, AS#, just a different connection. Its a huge ISP. > Is there some kind of peering needed between RA and RB, maybe some special > commands? > Am I at least on the right track? > My configs are posted below. > > If the ascii art gets confusing I have posted good a diagram as a gif at : > > http://sbnet.freeservers.com/bgp.gif > > virtual router > All routers use AS100 > ____________________ > __________________ > 172.16.20.0 ---> | 172.16.10.2--->RA | > 192.168.133.1------->|ISPA 192.168.133.2 | ----->internet > 172.16.30.0 --> | ------------------------| (RA eth1) > |__________________| > 172..16.10.0 ---> | 172.16.10.1-->HSRP | > | ----------------------- | > | 172.16.10.3---->RB | > _________________ > |___________________| > 192.168.100.1--------->|ISPB 192.168.100.2|------>internet > > (RB eth1) |________________| > > > Router A > ----------------------------------- > ------------------------------------ > interface FastEthernet0/0 > ip address 172.16.10.2 255.255.255.0 > standby priority 105 > standby 244 ip 172.16.10.1 > standby 244 preempt > standby 244 track FastEthernet0/1 > ! > interface FastEthernet0/1 > ip address ip address 192.168.100.1 255.255.255.252 > > > router bgp 100 > no synchronization > network 172.16.10.0 > network 172.16.20.0 > network 172.16.30.0 > neighbor 192.168.133.2 remote-as 100 > neighbor 192.168.133.2 prefix-list ABC in > neighbor 172.16.10.3 remote-as 100 > no auto-summary > ! > > ip prefix-list ABC seq 5 permit 0.0.0.0/0 > > end > > > > > Router B > ------------------------------------ > interface FastEthernet0/0 > ip address 172.16.10.3 255.255.255.0 > standby priority 100 > standby 244 ip 172.16.10.1 > standby 244 preempt > standby 244 track FastEthernet0/1 > ! > interface FastEthernet0/1 > ip address ip address 192.168.100.1 255.255.255.252 > > router bgp 100 > no synchronization > network 172.16.10.0 > network 172.16.20.0 > network 172.16.30.0 > neighbor 192.168.100.2 remote-as 100 > neighbor 192.168.100.2 prefix-list ABC in > neighbor 172.16.10.2 remote-as 100 > no auto-summary > ! > ip prefix-list ABC seq 5 permit 0.0.0.0/0 > > end Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49873&t=49807 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
