10-12-2009 04:09 PM - edited 03-06-2019 08:05 AM
I have a SVI running PIM. With 1 sender and 1 receiver on a single muticast group over a the same VLAN, I get no data loss. As soon as I add another receiver (igmp join), I experience data loss and output drops on the all of the receivers ports.
10-13-2009 10:14 AM
Hello Philip,
may you add some more details like:
platform
IOS image
config of your SVI
sh ip igmp groups
sh ip igmp snooping vlan SVI#
sh ip igmp snooping groups
sh ip igmp snooping querier
this can help to understand what is happening.
Hope to help
Giuseppe
10-13-2009 10:50 AM
Oct 13 14:45:46.260 EDT: %SYS-5-CONFIG_I: Configured from console by chief on vty0 (10.202.128.7)h ver
Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version 12.2(25)EWA4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Fri 23-Sep-05 13:31 by ssearch
Image text-base: 0x10000000, data-base: 0x114DFF08
ROM: 12.2(20r)EW1
Dagobah Revision 226, Swamp Revision 34
njds04 uptime is 2 years, 48 weeks, 3 days, 22 hours, 31 minutes
System returned to ROM by power-on
System restarted at 15:59:47 est Wed Nov 8 2006
System image file is "bootflash:"
cisco WS-C4506 (MPC8245) processor (revision 10) with 262144K bytes of memory.
Processor board ID FOX072301Q9
MPC8245 CPU at 266Mhz, Supervisor II+
Last reset from PowerUp
5 Virtual Ethernet interfaces
242 Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
Configuration register is 0x2101
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
!
!
interface GigabitEthernet2/1
description *** TRUNK to njds03_g2/1 ***
switchport trunk encapsulation isl
switchport trunk allowed vlan 200-203
switchport mode trunk
logging event link-status
speed 1000
duplex full
!
interface Vlan200
ip address 10.210.200.254 255.255.255.0
ip helper-address 10.210.206.255
ip helper-address 10.210.206.8
ip helper-address 10.210.206.47
ip helper-address 10.210.206.2
ip directed-broadcast
ip pim sparse-dense-mode
standby 200 ip 10.210.200.252
standby 200 priority 110
standby 200 preempt
standby 200 name PROD_FLEX
++++++++++++++++++++++++++++++++++++++++++++++++++++++
njds04#sh ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
239.255.255.250 Vlan200 15:00:02 00:02:40 10.210.200.174
224.9.10.11 Vlan200 05:41:13 00:02:43 10.210.200.133
224.10.10.21 Vlan200 14:46:35 00:02:38 10.210.200.186
239.255.219.45 Vlan200 14:46:29 00:02:47 10.210.200.154
239.10.9.1 Vlan200 15:00:01 00:02:39 10.210.200.184
239.9.10.11 Vlan200 15:00:01 00:02:38 10.210.200.130
239.10.10.3 Vlan200 10:32:46 00:02:41 10.210.200.154
239.10.10.4 Vlan200 10:22:09 00:02:38 10.210.200.130
224.0.1.40 Vlan200 15:00:02 00:02:43 10.210.200.253
njds04#sh ip igmp snooping vlan 200
Global IGMP Snooping configuration:
-----------------------------------
IGMP snooping : Enabled
IGMPv3 snooping : Enabled
Report suppression : Enabled
TCN solicit query : Disabled
TCN flood query count : 2
Vlan 200:
--------
IGMP snooping : Enabled
IGMPv2 immediate leave : Disabled
Explicit host tracking : Enabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode : IGMP_ONLY
njds04#sh ip igmp snooping groups
Vlan Group Version Port List
---------------------------------------------------------
200 224.0.1.40 v2 Gi2/1
200 239.9.10.11 v2 Gi5/2, Gi5/6
200 224.9.10.11 v2 Gi5/5
200 239.10.9.1 v2 Gi2/24, Gi2/26, Gi5/2, Gi5/5, Gi5/6
200 239.10.10.3 v2 Gi2/1, Gi5/5
200 239.10.10.4 v2 Gi5/2, Gi5/6
200 224.10.10.21 v2 Gi2/1, Gi2/24, Gi2/26, Gi5/2, Gi5/5, Gi5/6
200 239.255.219.45 v2 Gi2/1
200 239.255.255.250v2 Gi2/1
njds04#sh ip igmp snooping querier
Vlan IP Address IGMP Version Port
---------------------------------------------------
200 10.210.200.253 v2 Gi2/1
10-14-2009 11:46 AM
Hello Philip,
sorry for the late answer
I don't see anything wrong in the shows you have provided.
I tried to do a bug search for your switch and IOS image
the search of bugs related to multicast provides 170 entries.
Hope to help
Giuseppe
10-14-2009 12:01 PM
If the switch is running the following modules:
WS-X4548-GB-RJ45
and if there are 2 receiver hosts on the same ASIC(I am assuming ports 1-8) would there be an issue if the sender was sending multicast at nearly gigbit speed (on a different blade), would the switch drop data since it would be bound by the 1 gigabit shared between the 8 ports on the receiver's ASIC
10-14-2009 12:16 PM
Hello Philip,
you have hit the ball!
this limitation exists in this linecard and we have seen it with unicast traffic.
I cannot find the document now, but I've seen the same with unicast traffic in our network during new servers testings.
1 Gbps multicast traffic ? are you using a traffic generator?
Hope to help
Giuseppe
10-14-2009 12:23 PM
Yes I am using atraffic generator - mtools it is able to generate linespeed traffic @ the sender
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