From: Timothy Snow (timsnow@cogeco.ca)
Date: Sat Jul 12 2003 - 01:23:48 GMT-3
Ever wish things would work the way documented? It's been a long day so
far and I can't tell if i'm missing something or what. Any help would be
appreciated!
My understanding of OSPF is that the following is the proper order for
OSPF learned routes
Intra-Area
Inter-area
E1
E2
Supported by the following
http://www.cisco.com/warp/customer/104/9.html#q13
But, while working on a lab, my intra-area route wasn't there and I had
a routing loop. So I
went to the router that should have been following the right path and
cleared the RT. Here's
the output. First route is a Intra area, second is a E2.
Jul 11 23:53:12: RT: del 110.110.110.128/27 via 150.50.4.2, ospf metric
[110/11]
Jul 11 23:53:12: RT: add 110.110.110.128/27 via 150.50.24.1, ospf metric
[110/20]
I then went to the router that was also injected a type E2, changed it
to a type 1 in hopes
it would be prefered over the over E2 (per the cisco doc) and to my
surprise, the cost changed
(increased to 30) but then the other e2 with a cost of 20 won???
Jul 12 00:00:50: RT: del 110.110.110.128/27 via 150.50.24.1, ospf metric
[110/20]
Jul 12 00:00:50: RT: add 110.110.110.128/27 via 150.50.4.2, ospf metric
[110/20]
r4#
Jul 12 00:00:57: RT: metric change to 110.110.110.128 via 150.50.4.2,
ospf metric [110/20]
new metric [110/30]
Jul 12 00:01:08: RT: del 110.110.110.128/27 via 150.50.4.2, ospf metric
[110/30]
Jul 12 00:01:08: RT: add 110.110.110.128/27 via 150.50.24.1, ospf metric
[110/20]
Can anyone explain this? Goes against the RFC and the cisco Doc.
r4#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JOS56I-L), Version 12.1(11), RELEASE
SOFTWARE (fc1)
ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
BOOTLDR: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE
SOFTWARE (fc1)
r4 uptime is 11 hours, 28 minutes
System returned to ROM by power-on
System restarted at 12:39:59 EST Fri Jul 11 2003
System image file is "flash:/c2500-jos56i-l.121-11.bin"
cisco 2500 (68030) processor (revision F) with 16384K/2048K bytes of
memory.
This archive was generated by hypermail 2.1.4 : Wed Aug 06 2003 - 06:52:37 GMT-3