How does bgp conditional apply here? On Sat, 2002-07-27 at 10:52, Scott wrote: > 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 -- Jason Greenberg, CCNP Network Administrator Execulink, Inc. [EMAIL PROTECTED]
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