From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Oct 19 2003 - 03:36:35 GMT-3
> RouterB will ONLY be within area 2 by the way.
If a more specific network statement is applied it will supercede the
"network 0.0.0.0 255.255.255.255 area 2" statement.
See below:
Rack2R1(config)#router ospf 1
Rack2R1(config-router)# network 0.0.0.0 255.255.255.255 area 2
Rack2R1(config-router)#do sho ip os int lo 1
Loopback1 is up, line protocol is up
Internet Address 172.16.1.2/24, Area 2
Process ID 1, Router ID 172.16.1.2, Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
Rack2R1(config-router)# network 172.16.1.0 0.0.0.255 area 1
Rack2R1(config-router)#
*Mar 2 00:07:15.992: %OSPF-6-AREACHG: 172.16.1.0/24 changed from area 2 to
area 1
Rack2R1(config-router)#do sho ip os int lo 1
Loopback1 is up, line protocol is up
Internet Address 172.16.1.2/24, Area 1
Process ID 1, Router ID 172.16.1.2, Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
Rack2R1(config-router)#network 172.16.1.2 0.0.0.0 area 0
Rack2R1(config-router)#
*Mar 2 00:07:31.349: %OSPF-6-AREACHG: 172.16.1.2/32 changed from area 1 to
area 0
Rack2R1(config-router)#do sho ip os int lo 1
Loopback1 is up, line protocol is up
Internet Address 172.16.1.2/24, Area 0
Process ID 1, Router ID 172.16.1.2, Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Saturday, October 18, 2003 8:04 PM
To: 'Tan Chai Heng'; ccielab@groupstudy.com
Subject: RE: OSPF question
The network statement within OSPF is used to define which interfaces are
participating in OSPF. With your RouterB, I assume you want all of your
interfaces to participate?
The statements haveno bearing on what the other side will or will not be
doing, or anything to do with the "specific-ness" of routes advertised.
They simply indicate which interfaces on the router will participate in
OSPF and be entered into the OSPF database. OSPF has methods from
there...
So yup, it'll work.
RouterB will ONLY be within area 2 by the way.
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
CISSP, JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tan Chai Heng
Sent: Saturday, October 18, 2003 10:38 PM
To: ccielab@groupstudy.com
Subject: OSPF question
Hi,
Router A (OSPF - network 150.50.5.64 0.0.0.31 area 2)
Router B (OSPF - network 0.0.0.0 255.255.255.255 area 2)
Router A is connected to Router B on serial back to back. B's i/f ip is
150.50.5.68 /27, A's 150.50.5.69 /27
My question is, Router A's OSPF network command has a different subnet
than
its interface subnet, will this config work?
Thanks!
CH
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