[c-nsp] Cisco 3560G and multicast.
Arie Vayner (avayner)
avayner at cisco.com
Mon Aug 13 15:00:27 EDT 2007
Xavier,
Take a look at IGMP snooping:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12237se/scg/
swigmp.htm
Arie
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Xavier Beaudouin
Sent: Monday, August 13, 2007 19:41 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Cisco 3560G and multicast.
Hello,
I have a little problem with Cisco 3560G and multicast. I have several
switches connected between and a single VLAN that handle multicast.
I have tried several configuration and it seems that the switch doesn't
filter multicast and give *all* mcast traffic to all ports that are up
and running on the VLAN300.
Here is extract of the configuration :
Current configuration : 4119 bytes
!
! Last configuration change at 11:54:04 EDT Mon Aug 13 2007 ! NVRAM
config last updated at 11:52:00 EDT Mon Aug 13 2007 !
version 12.2
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone service
timestamps log datetime msec localtime show-timezone service
password-encryption no service dhcp !
hostname cisco
!
no aaa new-model
clock timezone EDT -5
clock summer-time EDT recurring
system mtu routing 1500
ip subnet-zero
no ip source-route
ip routing
ip domain-name fr.cfm.fr
ip name-server 172.16.0.133
ip name-server 172.16.0.134
!
ip multicast-routing distributed
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending vlan dot1q tag native !
interface GigabitEthernet0/7
switchport access vlan 300
switchport mode access
switchport nonegotiate
spanning-tree portfast
!
! ...
! all interfaces are configured like this...
!
interface GigabitEthernet0/20
description To other ciscos...
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,300,1002-1005 switchport mode trunk
switchport nonegotiate flowcontrol receive on !
interface Vlan1
no ip address
shutdown
!
interface Vlan2
description VLAN
ip address 10.110.100.1 255.255.255.0
no ip redirects
!
interface Vlan300
description Back-MCAST
ip address 10.200.0.101 255.255.255.128 ip pim sparse-mode !
ip default-gateway 10.1.3.254
ip classless
ip route 0.0.0.0 0.0.0.0 10.1.3.254
no ip http server
ip http secure-server
!
When looking on usage of mcast groups :
cisco#sh ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last
Reporter Group Accounted
239.1.1.1 Vlan300 00:39:19 00:02:36 10.200.0.23
239.255.14.1 Vlan300 00:39:19 00:02:38 10.200.0.36
239.255.14.2 Vlan300 00:39:19 00:02:42 10.200.0.3
239.255.14.3 Vlan300 00:39:19 00:02:36 10.200.0.10
239.255.14.5 Vlan300 00:39:19 00:02:36 10.200.0.22
239.255.14.11 Vlan300 00:39:18 00:02:40 10.200.0.3
239.255.14.12 Vlan300 00:39:17 00:02:40 10.200.0.3
239.255.14.13 Vlan300 00:39:19 00:02:36 10.200.0.25
239.255.13.1 Vlan300 00:39:19 00:02:36 10.200.0.21
239.255.13.2 Vlan300 00:39:18 00:02:38 10.200.0.3
239.255.13.3 Vlan300 00:39:19 00:02:36 10.200.0.28
239.255.13.5 Vlan300 00:39:19 00:02:36 10.200.0.36
239.255.15.21 Vlan300 00:39:19 00:02:42 10.200.0.3
239.255.15.1 Vlan300 00:39:18 00:02:40 10.200.0.27
239.255.15.2 Vlan300 00:39:19 00:02:40 10.200.0.3
239.255.15.3 Vlan300 00:39:18 00:02:37 10.200.0.9
Problem is shown there the ip igmp group is handled by the vlan not by
ports (physical ones). Is the any way to make this working correctly on
this material ?
Thanks,
/Xavier
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