From: kelvin@webmail.co.za
Date: Thu Jan 05 2006 - 04:00:42 GMT-3
Hi all
A question related to advertising of DVMRP routes via DVMRP tunnel
Scenariop:
R4 has an ethrenet interface 192.168.1.0/24 to the internet across which tunnel is built and two serial connection to other routers.
Question 1
If I have to advertise a summary address of two routes 172.16.4.0/24 and 172.16.5.0/24 via DVMRP tunnel.
Do I have to use the ip dvmrp metric [route-map]command first and then
ip dvmrp summary-address 172.16.4.0 255.25.254.0 ?
OR
Can I just use the ip dvmrp summary-address 172.16.4.0 255.255.254.0 command as these routes are in the unicast table. (According to Beau book this is all that is required)
The difference is that using the first command will block the connected networks which are advertised by default but will the summary kick in?
Question 2
Since auto-summary is on by default and there are different class boundaries involved, I assume that I have to turn the auto-summary off to ensure that 172.16.4.0 255.255.254.0 gets advertised not 172.16.0.0/16. Am I correct?
My answer was:
interface Tunnel4
description DVMRP Tunnel
ip unnumbered Ethernet0/1
ip pim dense-mode
ip dvmrp metric 1 route-map MSOURCES <---------- not sure here if required!
ip dvmrp summary-address 172.16.4.0 255.255.254.0
tunnel source GigabitEthernet0/1
tunnel destination 220.20.20.20
tunnel mode dvmrp
no ip dvmrp auto-summary <-------------------------- Please confirm
!
route-map MSOURCES permit 10
match ip address multicast_source
!
ip access-list standard multicast_source
permit 172.1.4.0 0.0.0.255
permit 172.1.5.0 0.0.0.255
Thanks all!
This archive was generated by hypermail 2.1.4 : Wed Feb 01 2006 - 07:45:47 GMT-3