OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 106 of 148
IGMP:
IGMP: Record Type = Change To Exclude Mode (0x4)
IGMP: Aux Data Len = 0 (0x0)
IGMP: Number of Source(s) = 0
IGMP: Multicast Address = 239.1.1.1
IGMP:
IGMP Membership Query
An IGMP Membership Query message is used to verify if there are still active subscribers registered for
a specific group.
IGMP Membership Query with 0.0.0.0 multicast group is called a General Query message. It used for
announcing querier’s availability.
MAC: ------ MAC Header ------
MAC:
MAC: Destination Address : 01 00 5E 00 00 01
MAC: Source Address : 00 00 00 00 0C 00
MAC:
IP: ------ IP Header -----------
IP:
IP: Version = 04 (0x04)
IP: Header Length = 20 (0x14)
IP: Differentiated Services Field = 0 (0x00)
IP: Type of Service = 00 (0x00)
IP: Total Length = 32 (0x0020)
IP: Identification = 0 (0x0000)
IP: Fragment Offset = 0
IP: Time to Live = 1 (0x01)
IP: Protocol = IGMP
IP: Checksum = 0x...
IP: Source Address = 10.0.0.1
IP: Destination Address = 224.0.0.1
IP:
IGMP: ------ IGMP Header -----------
IGMP:
IGMP: Version = 3 (0x3)
IGMP: Type = Membership Query (0x11)
IGMP: Max Response Time = 0x32 (Raw = 50)
IGMP: Checksum = 0xEECD
IGMP: Group = 0.0.0.0
IGMP: Reserved (Resv) = 0 (0x0)
IGMP: Suppress Router-Side Processing (S) = 0 (0x0)
IGMP: Querier's Robustness Variable (QRV)= 0 (0x0)
IGMP: Querier's Query Interval Code(QQIC) = 0x0 (Raw = 0)
IGMP: Number of Sources = 0 (0x0)
14.2. Basic troubleshooting
Basic outputs
Display IPMS config summary:
-> show ip multicast
Status = enabled,
Querying = disabled,
Proxying = disabled,
Spoofing = disabled,
Zapping = disabled,
Querier Forwarding = disabled,
Flood Unknown = disabled,
Version = 2,
Robustness = 2,
Query Interval (seconds) = 125,
Query Response Interval (tenths of seconds) = 100,
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