From: David Prall (dcp@dcptech.com)
Date: Wed Feb 20 2008 - 23:53:44 ARST
Correct you have a connected route so the summary is advertised.
-- http://dcp.dcptech.com> -----Original Message----- > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On > Behalf Of YourPal > Sent: Wednesday, February 20, 2008 10:00 AM > To: ccielab@groupstudy.com > Subject: A question about "ip summary-address eigrp" > > 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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