From: YourPal (dearprudence28@gmail.com)
Date: Wed Feb 20 2008 - 12:59:45 ARST
Hi Group,
I have the following config:
R4:
!
interface Serial0/0
ip address 167.1.34.4 255.255.255.0
ip summary-address eigrp 10 167.1.0.0 255.255.0.0 5
!
router eigrp 10
network 167.1.34.4 0.0.0.0
no auto-summary
!
R4#sh ip ei i
IP-EIGRP interfaces for process 10
Xmit Queue Mean Pacing Time Multicast
Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer
Routes
Se0/0 1 0/0 33 0/15 139 0
R4#sh ip ro con
167.1.0.0/16 is variably subnetted, 7 subnets, 3 masks
C 167.1.34.0/24 is directly connected, Serial0/0
R4#sh ip ro | i Null
D 167.1.0.0/16 is a summary, 00:01:17, Null0
I'm under the impression that if there are more specific routes (within the
range of the summary-address) being advertised out int s0/0, the summary
address will be advertised.
In this case, there are no component routes but why the summary is still
advertised (as verified on other EIGRP routers and also the presence of the
summary route pointing to Null0 on R4)? I guess it has something to do with
R4's s0/0 IP address which is within the range of the summary.
According to DocCD:
--------------------------------------------------------
You can configure a summary aggregate address for a specified interface. If
any more specific routes are in the routing table, EIGRP will advertise the
summary address out the interface.
--------------------------------------------------------
In my case, the specific route is s0/0, isn't it?
Please advise.
Thank you.
BR,
Emil
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