Cisco Catalyst 3850 series Configuration Manual page 89
Ip multicast routing configuration guide
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Also See for Catalyst 3850 series:
- Configuration manual (58 pages) ,
- Hardware installation manual (146 pages)
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Configuring IGMP
Command or Action
Step 3
interface interface-id
Example:
Device(config)# interface
gigabitethernet 1/0/1
Step 4
ip igmp max-groups action {deny |
replace}
Example:
Device(config-if)# ip igmp
max-groups action replace
Step 5
end
Example:
Device(config)# end
Step 6
show running-config interface
interface-id
Example:
Device# show running-config
interface gigabitethernet1/0/1
Step 7
copy running-config startup-config
Example:
Device# copy running-config
startup-config
OL-32598-01
Purpose
Specifies the physical interface to be configured, and enters interface
configuration mode. The interface can be a Layer 2 port that does not belong
to an EtherChannel group or an EtherChannel interface. The interface cannot
be a trunk port.
When an interface receives an IGMP report and the maximum number of
entries is in the forwarding table, specifies the action that the interface takes:
• deny—Drops the report. If you configure this throttling action, the
entries that were previously in the forwarding table are not removed
but are aged out. After these entries are aged out and the maximum
number of entries is in the forwarding table, the device drops the next
IGMP report received on the interface.
• replace—Replaces the existing group with the new group for which
the IGMP report was received. If you configure this throttling action,
the entries that were previously in the forwarding table are removed.
When the maximum number of entries is in the forwarding table, the
device replaces a randomly selected entry with the received IGMP
report.
To prevent the device from removing the forwarding-table entries, you can
configure the IGMP throttling action before an interface adds entries to the
forwarding table.
Note
To return to the default action of dropping the report, use the no ip
igmp max-groups action interface configuration command.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)
Configuring the IGMP Throttling Action (CLI)
65
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Troubleshooting
