Help: ISIS summarisation

From: Oliver Ziltener (ziltener@netcloud.ch)
Date: Tue May 20 2003 - 12:55:33 GMT-3

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I have this setup:

R1 ----- R2 ----- R5/R6/R4

R1 is in area 0001
R2,R4,R5,R6 in area 0100
Alle router are is-type L1/L2

The links between R2 and R5/R6/R7 are FR p2p with a /30 mask.
On R1, I have 3 loopbacks.

The summarisation of the loopbacks into Area 0100 works fine-i receive only
the summary!
The summarisation of the p2p links into Area 0001 works as expected, I got
the summary and the 3 more specific ones.

Any idea why i get the more specific and the summary on R1??

And second, I discoverd also, when i do "clear ip route " the Summary null0
router will till the next reload not appear in the routing table...?Bug???

thanks
Oliver

R1#
router isis
 summary-address 172.16.0.0 255.255.252.0
 passive-interface Loopback10
 passive-interface Loopback11
 passive-interface Loopback12
 passive-interface Loopback13
 net 49.0001.1111.1111.1111.00
 log-adjacency-changes

R1#
     172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
i su 172.16.0.0/22 [115/0] via 0.0.0.0, Null0
C 172.16.0.0/24 is directly connected, Loopback10
C 172.16.1.0/24 is directly connected, Loopback11
C 172.16.2.0/24 is directly connected, Loopback12
     192.168.100.0/24 is variably subnetted, 4 subnets, 2 masks
i L2 192.168.100.8/30 [115/30] via 192.168.200.2, Ethernet0/1 <<more
specific
i L2 192.168.100.4/30 [115/30] via 192.168.200.2, Ethernet0/1 <<more
specific
i L2 192.168.100.0/30 [115/30] via 192.168.200.2, Ethernet0/1 <<more
specific
i L2 192.168.100.0/28 [115/20] via 192.168.200.2, Ethernet0/1
<<<<<Summary!
R1#

R2#
router isis
 summary-address 192.168.100.0 255.255.255.240
 net 49.0100.2222.2222.2222.00
 log-adjacency-changes

R2#
     172.16.0.0/22 is subnetted, 1 subnets
i L2 172.16.0.0 [115/10] via 192.168.200.1, Ethernet0/0<<<only the summary
C 192.168.100.8/30 is directly connected, Serial0/0.6
C 192.168.100.4/30 is directly connected, Serial0/0.5
i su 192.168.100.0/28 [115/10] via 0.0.0.0, Null0
C 192.168.100.0/30 is directly connected, Serial0/0.4
R2#

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