From: Scott Morris (swm@emanon.com)
Date: Mon Jun 26 2006 - 13:40:29 ART
The specific matches in the distance command can sometimes be a pain to
interpret! :)
The ACL will always match the routes you want to change. That neighbor part
becomes confusing though.
In RIP, it's the advertising neighbor (or who you learned it from). In
EIGRP, it's the feasible successor (which is usually who you learned it
from). In OSPF, it's the advertising neighbor. You'll need to look at
"show ip ospf database" to learn the router ID of whoever injected the route
into the area.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Drayton Williams
Sent: Monday, June 26, 2006 8:45 AM
To: ccielab@groupstudy.com
Subject: OSPF distance manipulation
Hey guys,
Quick question on an issue I had last night doing a lab, here is the setup;
hub router (r1) with two spokes (r2)(r3); the spoke routers both have hdlc
connections to r4; running ospf area 10 between r1, r2, and r3 using ip
ospf point-to-point between hub and spokes (obviously r2 and r3 going to hub
are in different subnets). The hdlc connection between r2, r3, and r4 are
in ospf area 0;
from r1, I'm getting two routes to get 4.4.4.4 on r4 (just a loopback
interface i'm advertising into area 0 there); one from r2 and one from r3;
i'm trying to manipulate the administrative distance on r1 (since it should
only be locally significant) to prefer going to r2 as apposed to r3 to get
to this route; here is what i entered on r1;
router ospf 1
distance 109 2.2.2.2 0.0.0.0 OSPF
ip access-list standard OSPF
permit 2.2.2.2 0.0.0.0
Oddly enough, I could never get the distance to change, even after clearing
the ospf process and actually rebooting all 4 routers. My question, when
doing the distance command for ospf, is the "source ip" in the distance
command the router-id of the advertising router in ospf? I thought it was,
I also tried the following
distance 109 10.1.1.2 0.0.0.0 OSPF
where 10.1.1.2 is the serial ip; again, the distance never changed; Any
comments on this would be appreciated. Sorry I can't include the show ip
route ospf, and show ip ospf data, commands, as I'm sending this from a
location where I don't have access to my rack.
Thanks for your help in advance!
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