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Why can't change EIGRP summary route administrative distance?

Router A and B are running 12.3(22). I configured a EIGRP summary route on router A interface toward B with various administrative distance values. But in router B routing table, the summary route is alway EIGRP route with distance 90.

Router A:

interface Ethernet 0/0

ip summary-address eigrp 1 192.168.0.0 255.255.0.0

Router B routing table:

D 192.168.0.0/16 [90/2684416] via 172.20.1.1, 00:00:30, Ethernet0/0

Isn't the summary router default to administrative distance of 5?

Thanks a lot

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Why can't change EIGRP summary route administrative distance

R2(config-if)#do sh ip route 192.168.0.0

Routing entry for 192.168.0.0/16, supernet

Known via "eigrp 1", distance 5, metric 28160, type internal

Redistributing via eigrp 1

Routing Descriptor Blocks:

* directly connected, via Null0

Route metric is 28160, traffic share count is 1

Total delay is 100 microseconds, minimum bandwidth is 100000 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 1/255, Hops 0

Thats the type of output you will see.

Great I guess we can mark this post resolved.

4 REPLIES
Cisco Employee

Re: Why can't change EIGRP summary route administrative distance

Distance value is locally significant.

When you configured summary address in router A, the admin distance of the summary route is 5. When router A send the route to router B, router B will see it as a native EIGRP route and assign it with a admin distance value of 90.

HTH,

jerry

Re: Why can't change EIGRP summary route administrative distance

That changes the admin distance to 5 on router A.

Do a show ip route 192.168.0.0 on router A and you will see a route to null0 with an admin distance of 5.

New Member

Re: Why can't change EIGRP summary route administrative distance

Thanks a lot. Somehow on router A routing table, it only shows the summary route to Null0, with no distance value attached.

I misunderstood that router B would give the received summary route a distance value 5. Now it's clear.

Thanks again

Re: Why can't change EIGRP summary route administrative distance

R2(config-if)#do sh ip route 192.168.0.0

Routing entry for 192.168.0.0/16, supernet

Known via "eigrp 1", distance 5, metric 28160, type internal

Redistributing via eigrp 1

Routing Descriptor Blocks:

* directly connected, via Null0

Route metric is 28160, traffic share count is 1

Total delay is 100 microseconds, minimum bandwidth is 100000 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 1/255, Hops 0

Thats the type of output you will see.

Great I guess we can mark this post resolved.

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