09-17-2003 04:09 AM - edited 03-02-2019 10:23 AM
The setup of my customer live network is as follows:
R2
|
|
switch--------R1--------internet
|
|
|
R3
R1, R2 and R3 is running EIGRP. I want R1 to inject default route to R2 and R3, so I configure "ip summary-address eigrp 50 0.0.0.0 0.0.0.0" on R1 interface which connects to the switch.
When I do a show ip route on both R2 and R3, why the AD for the default route is 90 instead 5? I thought AD for EIGRP summary route is 5?
09-17-2003 07:11 AM
not sure why you're using the summary address command to inject a default route, eigrp will redistribute default automatically, so if you have ip route 0.0.0.0 0.0.0.0 on router 1 configured, that is probably where the default is being learned from.
09-17-2003 07:24 AM
Do you mean that as long as I have this statement, "ip route 0.0.0.0 0.0.0.0 next-hop" configured in R1, R2 and R3 will automatically have default route installed through EIGRP?
09-17-2003 07:17 AM
although I would like someone to clarify the ad of 5, I don't remember having ever heard that, but looked up on web page and verified it, however if I look at some of the address aggregation examples in doyle's book vol 1, it shows the ad of the aggregated routes as 90, not 5, can someone clarify?
09-17-2003 08:54 AM
AD is only local to a router it is not passed on to other boxes
09-17-2003 09:03 AM
The "ip summary-address eigrp" command creates a route pointing the summary address to the Null interface. The AD of the summary address, then, is the AD of this static route to Null. This means that the router will believe the route to Null over another EIGRP route to the same summary address. If you want the router to believe the summary from another router, assign an AD greater than 90 to the summary route.
HTH
Mark
09-17-2003 11:25 AM
yes you just need ip route 0.0.0.0 0.0.0.0 on router 1, no if it was igrp, you would need a default network command, or ospf a default originate command, but best I can remember, eigrp automatically distributes default
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