From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Wed Apr 13 2005 - 20:18:01 GMT-3
Gladston,
If you want to test the join filter, then do not make R3 a PIM neighbor. Just
do a join-group on the FastEthernet interface of R3. No PIM, no
multicast-routing.
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: gladston@br.ibm.com
To: ccielab@groupstudy.com
Sent: Wednesday, April 13, 2005 5:33 PM
Subject: Multicast filter does not avoid reply
Although 3550 is configured with igmp filter, and show commands shows it is
working, R3 reply to ping from R4.
R3-----(fa0/2)CAT2(fa0/3)-----R4
R3 and R4 are configured as PIM sparse-dense-mode. There is no RP. The goal
is to test IGMP filtering.
nmcr4>ena
nmcr4#p
Protocol [ip]:
Target IP address: 239.2.2.2
Repeat count [1]: 99999
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 99999, 100-byte ICMP Echos to 239.2.2.2, timeout is 2 seconds:
Reply to request 0 from 172.16.34.3, 4 ms
Reply to request 1 from 172.16.34.3, 4 ms
Group 239.2.2.2 does not appear on 3550:
CAT2#sh mac-address-table multicast vlan 34
Vlan Mac Address Type Ports
---- ----------- ---- -----
34 0100.5e00.0128 IGMP Fa0/1, Fa0/2
34 0100.5e01.0101 IGMP Fa0/1, Fa0/2
CAT configuration:
ip igmp profile 5
range 239.2.2.2 239.2.2.2
!
vlan 34
!
interface FastEthernet0/2
switchport access vlan 34
switchport mode access
no ip address
spanning-tree portfast
ip igmp filter 5
Isn't is strange? or may I missing something.
R3 is the IGMP query. I was wondering if it would cause this:
(as R3 is a router, 3550 forwards any multicast to the router, causing this;
well, it would happens even if R3 was not the querier)
CAT2#sh ip igmp snooping querier v 34
Vlan IP Address IGMP Version Port
---------------------------------------------------
34 172.16.34.3 v2 Fa0/2
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