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Multimedia Traffic Control with IP Multicast (IGMP)
IGMP Operating Features
Configuring Per-Port IGMP Packet Control. Use this command in the
VLAN context to specify how each port should handle IGMP traffic.
Syntax:
vlan < vlan-id > ip igmp
[auto <port-list> | blocked <port-list> | forward <port-list>]
Default: auto
Not e The blocked feature does not operate on a port if the port either detects a
router or belongs to multiple VLANs and is configured with forward on one of
these other VLANs.
For example, suppose you wanted to configure IGMP as follows for VLAN 1
on the 10/100 ports on the switch:
Ports A1-A7 auto Filter multicast traffic. Forward IGMP traffic to hosts on these ports
that belong to the multicast group for which the traffic is intended.
(Also forward any multicast traffic through any of these ports that
is connected to a multicast router.)
Port A8 forward Forward all multicast traffic through this port.
Ports A9-A12 blocked Drop all multicast traffic received from devices on these ports, and
prevent any outgoing multicast traffic from moving through these
ports.
Depending on the privilege level, you could use one of the following com-
mands to configure IGMP on VLAN 1 with the above settings:
HPswitch(config)# vlan 1 ip igmp auto a1-a7 forward a8 blocked
a9-a12
HPswitch(vlan-1)# ip igmp auto a1-a7 forward a8 blocked a9-
a12
The following command displays the VLAN and per-port configuration result-
ing from the above commands.
HPswitch> show ip igmp 1 config
Configuring IGMP Traffic Priority. This command assigns “high” priority
to IGMP traffic or returns a high-priority setting to “normal” priority.
Syntax: vlan < vlan-id > ip igmp high-priority-forward
Default: normal
HPswitch(config)# vlan 1 ip igmp Configures high priority for
high-priority-forward IGMP traffic on VLAN 1.
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