From: adz (ccie1day@totalise.co.uk)
Date: Fri Apr 11 2003 - 16:12:56 GMT-3
Hello
the easiest way to test this is to configure it incorrectly and then see
what happens.
Firstly the RP router - 4 in your example will realise that it is the RP
unless you tell it it's not allowed to be.
Secondly, since you're not using auto-rp (why not?) then you need to
configure static mappings on the other routers.
try this.
on R4, AND ASSUMING that the E0 IP address is 135.1.1.1
!
ip pim accept-rp 135.1.1.1 50
access-list 50 permit host 224.44.44.44
!!! the above tells the router that it's OK if E0 is an RP for group
224.44.44.44
and on another router - lets call it R3 (directly connected would be a good
idea for the 1st one)
!
ip pim rp-address 135.1.1.1 50
access-list 50 permit host 224.44.44.44
!AND WE NEED A ROUTER TO JOIN THE GROUP SO ON R3
INT e0
ip igmp join group 224.44.44.44
!
now on R3, ping 224.44.44.44 and see if you get a reply - you should
issie a show ip pim rp and see what you get!
NOW lets break it!
Lets tell R4 that it isn't allowed to be a RP for 224.44.44.44
!
R4
no access-list 50
access-list 50 deny host 224.44.44.44
!
on R3 ping the group again
view the console output on R4, you should see lots of INVALID JOIN messages
good luck
Adz
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Robert Yee
Sent: 11 April 2003 09:24
To: ccielab@groupstudy.com
Subject: Testing Multicast Configuration
Hi All,
In a lab environment - without any real multicast sources, is there any way
to test a multicast configuration, if the 'RP' router is not joined to a
multicast group?
For example, IP expert labs asks:
R4 has a multicast source connected to its E0 interface. The multicast
address is 224.44.44.44. Without having R4 announce itself as the RP,
configure all routers to use R4 as the RP for this multicast group.
It does not ask to configure R4's e0 interface to join a multicast group.
How can I test this w/out having to configure 'ip igmp join x.x.x.x' ? 'show
ip mroute' does not indicate a route. Is there another command?
Thanks,
Robert
This archive was generated by hypermail 2.1.4 : Thu May 01 2003 - 13:35:51 GMT-3