All things related to multicast

[Gordon Rogier <>]

make sure you jack up the mac address aging timers on the ethernet
swithces.  cgmp updates do no appear to reset/update the CAM table timers
upon receiveing a previsously known CGMP message.  it is very difficult to
explain the mcast state war that occurs due to this, but i have seen it
occur.

i have not worked specifically on the 6500, but i have seen evidence of
this on other cisco products.

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Gordon Rogier                        

            
Network Engineer                     785-864-0381wk 785-550-4468 cell
Great Plains Network                 785-864-9330 FAX

On Fri, 17 Nov 2000, Alan Crosswell wrote:

> Does anyone have a cookbook example of IGMP/CGMP configurations that
> might solve my problem which is an apparent prune happening when the 3 
> minute
> timer expires?  My network consists of a bunch of Catalyst 6509's with
> MSFC's running 12.0(7)XE.  These are connected into a pair of L2 "core"
> 6509's that interconnect all the edge routers on two VLANs (501 and 502).
> Hung off the 6509's are a variety of Catalyst 5500, 4006,
> etc. switches that are running CGMP.  I think I just need to diddle
> something on the 6509 IGMP/CGMP snooping options....  This used to work 
> until
> I touched something :-(
> 
> Starting up from the bottom I have:
> 
> Catalyst switch in VLAN 39 has 
>  set cgmp enable
>  set cgmp leave enable
> 
> 6509 w/MSFC with several Catalysts in VLAN 39 has:
> 
> wat-edge-1>sho vlan id 39
> 
> VLAN Name                             Status    Ports
> ---- -------------------------------- --------- 
> -------------------------------
> 39   Watson_Hall                      active    Gi1/1, Gi2/1, Gi4/4, Gi4/6
>                                                 Fa5/48
> 
> VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 
> Trans2
> ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ 
> ------
> 39   enet  100039     1500  -      -      -        -    -        0      0   
> interface GigabitEthernet1/1
>  no ip address
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk native vlan 501
>  switchport trunk allowed vlan 1-501,503-1005
>  switchport mode trunk
>  switchport nonegotiate
> end
> 
> interface GigabitEthernet2/1
>  no ip address
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk native vlan 502
>  switchport trunk allowed vlan 1-500,502-1005
>  switchport mode trunk
>  switchport nonegotiate
> end
> interface GigabitEthernet4/4
>  no ip address
>  switchport
>  switchport access vlan 39
>  switchport trunk encapsulation dot1q
>  switchport trunk native vlan 39
>  switchport trunk allowed vlan 1,5,39,59,1001-1005
>  switchport mode trunk
>  switchport nonegotiate
> end
> 
> interface GigabitEthernet4/6
>  no ip address
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk native vlan 39
>  switchport mode trunk
>  switchport nonegotiate
> end
> 
> !
> interface FastEthernet5/48
>  no ip address
>  duplex full
>  speed 100
>  switchport
>  switchport access vlan 39
>  switchport mode access
> end
> 
> interface Vlan39
>  description Watson subnet
>  ip address 128.59.31.1 255.255.255.0 secondary
>  ip address 128.59.39.1 255.255.255.0
>  ip helper-address 128.59.59.25
>  ip pim sparse-dense-mode
>  ip cgmp
>  ip sap listen
>  appletalk cable-range 14347-14347 14347.8
>  appletalk zone WatsonII
>  ipx encapsulation ARPA
>  ipx network 803B2700
> end
> 
> Here's DEBUG IP IGMP 224.2.175.113 console log:
> 
> I have no idea where these Illege group address messages are coming from.
> 
> *** - fire up an IPTV viewer here:
> wat-edge-1#
> wat-edge-1#
> Nov 17 10:40:58.518 EST: IGMP: Received v2 Report from 128.59.31.169 
> (Vlan39) for 224.2.175.113
> Nov 17 10:41:04.654 EST: IGMP: Send v2 Query on Vlan39 to 224.0.0.1
> Nov 17 10:41:05.286 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:41:07.322 EST: IGMP: Received v2 Report from 128.59.31.169 
> (Vlan39) for 224.2.175.113
> Nov 17 10:41:13.614 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:27.654 EST: IGMP: Send v2 Query on Vlan222 to 224.0.0.1
> Nov 17 10:41:28.414 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:28.522 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:32.394 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:41:33.314 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:34.346 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:36.290 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:41:37.546 EST: IGMP: Received v2 Query from 128.59.1.1 (Vlan501)
> Nov 17 10:41:37.546 EST: IGMP: Received v2 Query from 128.59.2.1 (Vlan502)
> Nov 17 10:41:39.654 EST: IGMP: Send v2 Query on Vlan50 to 224.0.0.1
> Nov 17 10:42:04.666 EST: IGMP: Send v2 Query on Vlan39 to 224.0.0.1
> Nov 17 10:42:05.386 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:05.386 EST: IGMP: Received v2 Report from 128.59.31.169 
> (Vlan39) for 224.2.175.113
> Nov 17 10:42:13.386 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:42:27.666 EST: IGMP: Send v2 Query on Vlan222 to 224.0.0.1
> Nov 17 10:42:28.290 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:28.418 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:32.738 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:34.486 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:42:34.502 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:37.466 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:42:37.546 EST: IGMP: Received v2 Query from 128.59.1.1 (Vlan501)
> Nov 17 10:42:37.546 EST: IGMP: Received v2 Query from 128.59.2.1 (Vlan502)
> Nov 17 10:42:39.666 EST: IGMP: Send v2 Query on Vlan50 to 224.0.0.1
> Nov 17 10:43:04.679 EST: IGMP: Send v2 Query on Vlan39 to 224.0.0.1
> Nov 17 10:43:05.195 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:07.463 EST: IGMP: Received v2 Report from 128.59.31.169 
> (Vlan39) for 224.2.175.113
> Nov 17 10:43:09.467 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:43:27.683 EST: IGMP: Send v2 Query on Vlan222 to 224.0.0.1
> Nov 17 10:43:28.563 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:43:28.683 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:29.595 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:30.491 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:30.507 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:34.743 EST: IGMP: Illegal group address 224.0.0.2
> Nov 17 10:43:37.547 EST: IGMP: Received v2 Query from 128.59.1.1 (Vlan501)
> Nov 17 10:43:37.547 EST: IGMP: Received v2 Query from 128.59.2.1 (Vlan502)
> Nov 17 10:43:39.683 EST: IGMP: Send v2 Query on Vlan50 to 224.0.0.1
> Nov 17 10:44:04.691 EST: IGMP: Send v2 Query on Vlan39 to 224.0.0.1
> Nov 17 10:44:05.547 EST: IGMP: Illegal group address 224.0.0.9
> Nov 17 10:44:07.531 EST: IGMP: Received v2 Report from 128.59.31.169 
> (Vlan39) for 224.2.175.113
> 
> *** - three minutes go by and IPTV viewer frame rate drops to zero.
> 
> /a
> 
> PS: The viewer is on 128.59.31.169.
> 
>