From: BUI, TIN T (SBCSI) (tb4565@xxxxxxx)
Date: Thu Dec 21 2000 - 18:45:07 GMT-3
Since IGRP does not advertise mask it uses mask of interface. Since serial
is using 24 bit mask, you would not see the 32 bit mask (loopback) being
advertised. RIP 1 would exhibit same behavior. However, the reason why you
are seeing the 32 bit mask advertised when running RIP is that RIP 2 came
into play advertising the loopback5. If you do show ip prot on downstream
routers, you will see that the default for RIP is to send RIP 1 but listen
to RIP 1 & 2 and in this case it heard the 32 bit mask from RIP V2. If you
go into router that has the 32 bit mask loop and do debug ip rip, you will
see that RIP V2 is sourced on the 32 bit mask eventhough you did not specify
RIP V2. Is this a Cisco Feature or bug???
> Tin T. Bui
> Senior Network Manager
> Network Management Center
> SBC Services Inc.
> 7337 Trade Street, Rm 1110
> San Diego, Ca 92121
> Office #: 858-886-4644/858-886-4589
> Pager #: 858-494-0482
> Fax #: 858-549-4103
> Email: tb4565@sbc.com
>
-----Original Message-----
From: Lykourgiotis Paraskevas [mailto:ParaskevasL@pcsystems.gr]
Sent: Wednesday, December 20, 2000 10:10 AM
To: ccielab@groupstudy.com
Subject: FW: IGRP host routes.
By saying host routes, I mean loopback interfaces with a mask of 32.
The configuration I am using is:
interface Loopback5
ip address 172.1.3.1 255.255.255.255
no ip directed-broadcast
!
router igrp 1
network 172.1.0.0
default-metric 1000 1000 255 1 1500
!
interface Serial0/0
ip address 172.1.1.2 255.255.255.0
So the advertisements for 172.1.3.1/32 are not advertised to S0/0 (deb ip
igrp trans).
If I use RIP, no problem.
-----Original Message-----
From: Chuck Larrieu [mailto:chuck@cl.cncdsl.com]
Sent: Wednesday, December 20, 2000 8:01 PM
To: Lykourgiotis Paraskevas
Subject: RE: IGRP host routes.
Host routes are static routes - by definition. /32's
If you were to redistribute static into IGRP my guess is no. classful nature
of IGRP would not accept a mask different that what is used in the IGRP
process. I can test this out at lunch time. The routers are on.
Chuck
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Lykourgiotis Paraskevas
Sent: Wednesday, December 20, 2000 9:38 AM
To: ccielab@groupstudy.com
Subject: IGRP host routes.
Hi.
I want to ask something basic.
Does IGRP advertise host routes (in a non segmented network enviroronment)?
I think, in theory, host routes are advertised by the originator of the host
routes, at least.
In the same environment, if I turn to RIP, I have no problem.
TIA,
Paraskevas
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:26:09 GMT-3