I have a very small network, only 3 networks so i really don;t want to run an IGP. I especially don't want to run it on my firewall. The ISP suggested the HSRP solution since we are using static route between our firewall and these 2 routers. I know there has to be way to do this and am trying to figure it out. I don't have enough routers to set up a lab so I can't test it before i put it in production.
Thanks. ""Jay Greenberg"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > If I understand you correctly, I don't think that HRSP is what you > need. HRSP is good if upstream serial interfaces go down, or something > like that, or for router redundancy, but in your situation I would > suggest letting your IGP determine which upstream is active, based on > who is still advertising the default BGP prefix. If you are using OSPF, > you could use #default-information originate. If the BGP default prefix > is the only default route on your edge routers, the OSPF default will > disappear if the BGP default disappears. If you don't use OSPF, just > redistribute the BGP default into your IGP. > > I am assuming that when your ISP goes "down", they stop sending the BGP > default. > > This will allow 1 of 2 things to happen. If your downstream devices are > IGP routers, they will already know the best to the good BGP upstream. > If they are hosts with static default routes, then their default gateway > could always relay the packet, or suggest an ICMP redirect to the host. > > Let me know if this helps! > > Jay Greenberg > > On Fri, 2002-07-26 at 14:50, sam sneed wrote: > > 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=49823&t=49807 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
