User Manual

12.2.6 Set discarding of IGMP packets with invalid TTL values
[Syntax]
igmp snooping check ttl
no igmp snooping check ttl
[Initial value]
Depends on VLAN preset. Refer to 3.2 Default setting values on page 20.
[Input mode]
interface mode
[Description]
Discards IGMP packets for which the IP header's TTL value is invalid (other than 1).
If this is executed with the "no" syntax, IGMP packets are not discarded even if the TTL value is invalid (other than 1).
If the applicable packet is not discarded but forwarded, the TTL value is corrected to 1 when forwarding.
[Note]
This command can be specified only for VLAN interface. Also, this can be specified only if IGMP snooping is enabled.
[Example]
Discard IGMP packets on VLAN #2 whose TTL value is invalid.
SWP1#configure terminal
SWP1(config)#interface vlan0.2
SWP1(config-if)#igmp snooping check ttl
Do not discard IGMP packets on VLAN #2 whose TTL value is invalid.
SWP1#configure terminal
SWP1(config)#interface vlan0.2
SWP1(config-if)#no igmp snooping check ttl
12.2.7 Set IGMP version
[Syntax]
igmp snooping version version
no igmp snooping version
[Parameter]
version : <2-3>
IGMP version
[Initial value]
igmp snooping version 3
[Input mode]
interface mode
[Description]
Sets the IGMP version.
If this command is executed with the "no" syntax, the IVMP version returns to the default setting (V3).
[Note]
This command can be specified only for VLAN interface. Also, this can be specified only if IGMP snooping is enabled.
If an IGMP packet of a different version than this setting is received, the following action occurs.
•
When set to V2
•
If a V3 query is received, it is forwarded as a V2 query
• If a V3 report is received, it is discarded
• When set to V3
• If a V2 query is received, it is forwarded as a V2 query
• If a V2 report is received, it is forwarded as a V3 report
[Example]
On VLAN #2, set the IGMP version to 2.
158 | Command Reference | IP multicast control