From: Tony Schaffran (groupstudy@cconlinelabs.com)
Date: Sun Jan 04 2004 - 16:03:13 GMT-3
Hello John,
Your loopback0 address
172.16.111.1 255.255.248.0
is in the network 172.16.104.0/21 and it is a connected network.
The network statement that you have in your OSPF
network 172.16.111.0 0.0.0.7 area 11
is a subnet of your loopback0 network, that is why you see
O IA 172.16.104.0/21 [110/65] via 172.16.123.1, 00:01:58, Serial0.1
on your other router.
Tony Schaffran
Network Analyst
CCIE #11071
CCNP, CCNA, CCDA,
NNCDS, NNCSS, CNE, MCSE
www.cconlinelabs.com
Your #1 choice for online Cisco rack rentals.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Underhill
Sent: Sunday, January 04, 2004 10:37 AM
To: ccielab@groupstudy.com
Subject: Router blew a gasket
I was looking through the routing tables and noticed a route I didn't
advertise. This is really strange, because it says loop0 is connected on
this
box in the route table, and is advertising it into OSPF, but the loop0
address
that is configured is not the same, (not even close), and I never advertised
this network in OSPF. Router has been rebooted and erased since the last
config, but it looks like it's keeping it in memory.. pretty weird..
172.16.0.0/16 is variably subnetted, 9 subnets, 5 masks
C 172.16.134.0/24 is directly connected, Serial0.2
O IA 172.16.44.0/29 [110/65] via 172.16.134.4, 00:03:52, Serial0.2
O IA 172.16.22.0/27 [110/65] via 172.16.123.2, 00:03:52, Serial0.1
C 172.16.1.0/24 is directly connected, Serial1
C 172.16.123.0/24 is directly connected, Serial0.1
C 172.16.104.0/21 is directly connected, Loopback0 <-- This one --
R1#
!
interface Loopback0
ip address 172.16.111.1 255.255.248.0
no ip directed-broadcast
no ip route-cache
ip ospf network point-to-point
router ospf 110
area 111 virtual-link 172.16.134.4
network 172.16.111.0 0.0.0.7 area 11
network 172.16.123.0 0.0.0.255 area 0
network 172.16.134.0 0.0.0.255 area 111
Routing table on another box shows the route..
C 172.16.122.0/27 is directly connected, Loopback0
C 172.16.22.0/24 is directly connected, Dialer0
C 172.16.22.1/32 is directly connected, Dialer0
C 172.16.123.0/24 is directly connected, Serial0.1
O IA 172.16.104.0/21 [110/65] via 172.16.123.1, 00:01:58, Serial0.1
R2#
This archive was generated by hypermail 2.1.4 : Mon Feb 02 2004 - 09:07:36 GMT-3