Hello Murtaza, My problem was that the core router was running BGP (simulated ISP connection) and I also had the 0.0.0.0 0.0.0.0 s0 route and I redistributed this into eigrp so as to inject a default route of D EX to other routers in my EIGRP domain. Question is: Would this default route on my core router be used for all outing connections to the Internet? Wouldn't this also override BGP as it has a AD of 0 compared to that of 20 of BGP? Please advise. Thank you.
>From: "Murtaza Syed" >Reply-To: "Murtaza Syed" >To: [EMAIL PROTECTED] >Subject: Re: EIGRP 'default network' Rehash [7:31799] >Date: Mon, 14 Jan 2002 01:37:29 -0500 > >Following is some info from Cisco's site: >http://www.cisco.com/warp/public/103/eigrp8.html > >Default Routing > >There are two ways to inject a default route into EIGRP: redistribute a >static route or summarize to 0.0.0.0/0. Use the first method when >you want to draw all traffic to unknown destinations to a default route at >the core of the network. This method is effective for advertising >connections to the Internet. For example: > > ip route 0.0.0.0 0.0.0.0 x.x.x.x (next hop to the internet) > ! > router eigrp 100 > redistribute static > default-metric 10000 1 255 1 1500 > >The static route that is redistributed into EIGRP does not have to be to >network 0.0.0.0. If you use another network, you must use the ip >default-network command to mark the network as a default network. Please >refer to Configuring a Gateway of Last Resort for further >information. > >Summarizing to a default route is effective only when you want to provide >remote sites with a default route. Since summaries are configured >per interface, you don't need to worry about using distribute-lists or >other >mechanisms to prevent the default route from being propagated >toward the core of your network. Note that a summary to 0.0.0.0/0 overrides >a default route learned from any other routing protocol. The >only way to configure a default route on a router using this method is to >configure a static route to 0.0.0.0/0. (Beginning in Cisco IOS >Software 12.0(4)T, you can also configure an administrative distance on the >end of the summary-address command, so the local summary >doesn't override the 0.0.0.0/0 route). > > router eigrp 100 > network 10.0.0.0 > ! > interface serial 0 > encapsulation frame-relay > no ip address > ! > interface serial 0.1 point-to-point > ip address 10.1.1.1 > frame-relay interface-dlci 10 > ip summary-address eigrp 100 0.0.0.0 0.0.0.0 > >Regards, > >Murtaza > >----- Original Message ----- >From: "s vermill" >To: >Sent: Sunday, January 13, 2002 4:33 PM >Subject: EIGRP 'default network' Rehash [7:31799] > > > > Sorry to bring this up again but apparently, for at least some of us, it > > needs to be. I chimed in the other day and offered a way to get EIGRP >to > > distribute a default route. That basically amounted to simply defining >a > > static to 0.0.0.0 and redistributing static into EIGRP (whoever >corrected >me > > by pointing out that the 'network 0.0.0.0' command isn't necessary, I >thank > > you (it was in BSCN)). > > > > Wayne jumped in and explained some problems with EIGRP and the 'ip > > default-network' command. I thought it all sounded quite reasonable. >So >I > > tried this in the lab for several hours today (no "get a life" remarks > > please). I must be really dense, because nothing I try works quite the >way > > (that I thought) it was described. It seems that the only way to > > sucessfully use the default-network is to configure it on every single > > router in the AS (I tried this with RIP just as a sanity check and it >worked > > just fine). > > > > If that is the case, can a good argument be made in favor of this >approach > > over redistributing static? Or summarizing to 0.0.0.0 0.0.0.0 on an > > interface? Both of those, at least, propogate throughout the AS after > > configuration on just one router. > > > > Thanks in advance, > > > > Scott _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31896&t=31799 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
