From: Brian Dennis (brian@5g.net)
Date: Tue Sep 03 2002 - 01:00:48 GMT-3
If you are trying to use ip unnumbered between two routers and run OSPF
across them then the unnumbered interfaces must be in the same OSPF
area.
Brian Dennis, CCIE #2210 (R&S/ISP Dial)
-----Original Message-----
From: Khalid Siddiq [mailto:khalid@sys.net.pk]
Sent: Monday, September 02, 2002 9:53 PM
To: Brian Dennis; Casey, Paul (6822); ccielab@groupstudy.com
Subject: RE: Help needed
Brian,
we also have to run ospf on serial interface, is their any issue when we
configured ospf on serial interface having ip unnumbered loopback 0 is
configured.
regards,
khalid
-----Original Message-----
From: Brian Dennis [mailto:brian@5g.net]
Sent: Tuesday, September 03, 2002 4:30 AM
To: 'Casey, Paul (6822)'; ccielab@groupstudy.com
Subject: RE: Help needed
Use IP unnumbered and PPP encapsulation. PPP will install a host route
to the other side via the peer neighbor-route command which is on by
default. See below.
Brian Dennis, CCIE #2210 (R&S/ISP Dial)
R3's Config
!
hostname R3
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Serial1
ip unnumbered Loopback0
encapsulation ppp
!
end
R4's Config
!
hostname R4
!
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface Serial0/0
ip unnumbered Loopback0
encapsulation ppp
clockrate 64000
!
end
R4#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/31/33 ms
R4#sho ip rout
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Serial0/0
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4 is directly connected, Loopback0
R4#
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Casey, Paul (6822)
Sent: Monday, September 02, 2002 12:10 PM
To: 'ccielab@groupstudy.com'
Subject: Help needed
This is a lab i am working on.
2 routers back to back. Running ospf between then on there serial
interfaces
only. 1 of the routers has a loopback address, which is not running
ospf.
The object is to be able to ping this loopback address from the other
router... No static, default routes..allowed. The question also states
that
NO routing protocol may advertise this loopback address in any way...
Anyone got any idea's how to achieve this..??? I was thinking about some
kind of tunneling..!!
If it is tunneling, could someone provide an example of this
Any help appreciated
Kind regards
Paul.
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