Thanks for the reply, You are correct on your first point. The post in the archive, by Howard, I realize it does NOT make mention of dial backup. I think this is my error, I need to delete the backup interface command. I think the dial backup is meant for a serial interface (frame relay, X-25,etc.), this is because layer 2 can be detected when it goes down. So I think in the case of ethernet, the alternate is a floating static route. I am not going to show the whole config, cause I think the backup command is the issue. However if you would like to anyway, let me know. I will give this a try tonight(if some maintenance downtime is available) and let you and everyone know how it works out. Thanks again. KM >From: ElephantChild >To: KM Reynolds >CC: [EMAIL PROTECTED] >Subject: Re: BRI0 Backup Interface for Ethernet Primary Interface [7:7027] >Date: Mon, 4 Jun 2001 11:18:00 +0200 (CEST) > > > My config: > > interface Ethernet1 > > backup delay 0 3 > > backup interface BRI0 > > > > router eigrp 10 > > network 172.26.0.0 > > > > ip route 172.20.20.0 255.255.255.0 10.10.9.5 200 > >That's too skimpy for a reliable diagnostic. Can you post your whole >configuration to the list? (Sanitize as necessary.) > >A few things you may want to try or check: > >- I don't think you need the backup statements in that case. What > triggers dialing using the BRI isn't e1 going down, but traffic to > 172.20.20.0/24 after EIGRP removes the route to that through e1. > >- Is 10.10.9.5 reachable with e1 down? Does pinging it bring up bri0? > >- When you say bri0 doesn't come up, do you mean when e1 goes down, when > the EIGRP route goes away, or when there's traffic for 172.20.20.0/24 > and the route's down? > >On Mon, 4 Jun 2001, KM Reynolds wrote: > > > Hi Everyone, > > > > I need to configure a ISDN link as backup for the primary interface. >The > > primary interface is Ethernet1. I researched a numbers of books and >they > > all are talk about serial or frame relay interface as the primary. > > I was able to search the archives and I found the identical problem that >I > > am encountering. The post stated that yes the BRI0 interface can work >as a > > backup for an ethernet interface. The following is a paste of the >post(by > > Howard Berkowitz): > > > > "Yes. The key to the solution is to use a low-overhead routing protocol >such > > as OSPF or EIGRP as a layer 3 keepalive mechanism." > > "Set up OSPF or EIGRP to define a path to the destination using the > > Ethernet. Set up a static route with administrative distance greater >than > > that of the routing protocol (at least 200 is a good idea), with this >static > > route going to the next hop address of the remote ISDN interface. > > If OSPF or EIGRP stop seeing hellos across the Ethernet, they will drop >the > > route. The static route will now float up into the routing table, and >you > > will get dial-on-demand routing across the ISDN. When OSPF sees its >route > > again, after the Ethernet is back up, the Ethernet route will replace >the > > ISDN in the active routing table, and the inactivity timer on the ISDN >will > > disconnect it." > > > > I have followed the instructions, but no luck. When I shutdown the >ethernet > > interface the BRI0 backup interface will not come up. > > The question I have are: > > 1. If I administratively shutdown the ethernet interface is that the >same as > > if I disconnected the cable so that the e1 interface will not see a > > keepalive. > > 2. I did not see any other treads as to if solution worked. Has anyone >run > > into this situation and has an answer or suggest anything. > > > > My config: > > interface Ethernet1 > > backup delay 0 3 > > backup interface BRI0 > > > > router eigrp 10 > > network 172.26.0.0 > > > > ip route 172.20.20.0 255.255.255.0 10.10.9.5 200 > > > > Lastly, one of the books (Internetworking & Troubleshooting by C. Long) > > stated something about layer 2 and the "no keepalive" option. It didn't >go > > further on this issue and don't know if I understood it. If someone can > > explain, it would be much appreciated. > > > > Sorry for the long post. TIA > >-- >"Someone approached me and asked me to teach a javascript course. I was >about to decline, saying that my complete ignorance of the subject made >me unsuitable, then I thought again, that maybe it doesn't, as driving >people away from it is a desirable outcome." --Me > > _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=7069&t=7069 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
