OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 99 of 148
14. Troubleshooting IP Multicast Switching (IPMS)
There should be 1 dedicated querier in the network (in case more than 1 querier is enabled, then there is 1
querier elected and the others remain inactive)
Querier-forwarding should be enabled only on switches located between multicast sources and the querier
Zapping should be enabled only on edge devices
Proxying may be enabled on all devices
IGMP messages must be sent with TTL equal 1
Freezing and pixelation might be caused by congestion or incorrect IGMP Leave handling
Summary of the commands in this chapter is listed here:
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show ip multicast
show ip multicast querier
show ip multicast source
show ip multicast group
show ip multicast group
show log swlog | grep -E "ipmsCmm|ipmsNi"
debug ip multicast member
debug ip multicast flow
debug ip multicast channel
debug ip multicast interface
debug ip multicast vlan xx
debug ip multicast stats
debug $(pidof ipmscmm) 'p ipms::bcm_max'
getreg MC_CONTROL_5
d chg l2mc
d l3_ipmc
d l3_entry_2
d l3_ipmc
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14.1. Introduction
OS6900 and OS10K Hardware Limitations
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