Eigrp stub summary

[feroz syed]

Hi,

I have some doubts in Eigrp stub summary, i have hub and spoke frame-relay topology three routers directly connected to frame-relay switch running eigrp protocol on all three routers.

This is router 1 config

R1#sh run | sec ei

ip hello-interval eigrp 1 5

ip hold-time eigrp 1 15

no ip split-horizon eigrp 1

ip summary-address eigrp 1 1.0.0.0 255.0.0.0 5

router eigrp 1

network 1.0.0.0

network 11.0.0.0

network 192.168.123.0

no auto-summary

eigrp stub summary leak-map mymap

R1#sh ip int br

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            unassigned      YES unset  administratively down down   

Serial1/0                  192.168.123.1    YES manual up                    up     

Serial1/1                  unassigned       YES unset  administratively down down   

Serial1/2                  unassigned       YES unset  administratively down down   

Serial1/3                  unassigned       YES unset  administratively down down   

Loopback0                  1.1.1.1          YES manual up                    up     

Loopback1                  11.11.11.1      YES manual up                    up

R1(config)#do sh ip prefix-list

ip prefix-list myprefix: 3 entries

   seq 5 permit 2.2.2.0/24

   seq 10 permit 3.3.3.0/24

   seq 15 permit 11.0.0.0/24

R1(config)#do sh route-map

route-map mymap, permit, sequence 10

  Match clauses:

    ip address prefix-lists: myprefix

  Set clauses:

  Policy routing matches: 0 packets, 0 bytes

This Router 1 now advertise only summary routes that is 1.0.0.0 network and leak-map networks to spokes.so it will not advertise netwrk 11.0.0.0 network  am right ?. is there any way to advertise 11.0.0.0 netwrk to spokes without doing summary.

i try using leak-map to add 11.0.0.0 netwrk  but it won't work. can any one explain why it not advertise 11.0.0.0 netwrk using leak-map and aslo tell me any way to advertise 11.0.0.0 network without doing summary.

[lmediavilla]

You do

eigrp stub summary but you don't have a summary, please add on the interface that connects both routers

ip summary-address eigrp 1 11.0.0.0 255.255.255.0 5

cheers

[dslice · Accepted solution]

You're not using the leak-map in the way it was intended. That feature only works for a particular topology, allowing a subset of prefixes learned from one peer to be leaked to another peer. It will not do what you're trying to do here. As already mentioned, the stub summary doesn't create the summary, only allow it to be advertised.

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