Brocade Communications Systems IPMC5000PEF manual Enabling or disabling error and warning messages

Enabling or disabling error and warning messages

Enabling or disabling error and warning messages

The device prints error or warning messages when it runs out of software resources or when it receives packets with the wrong checksum or groups. These messages are rate-limited. You can turn off these messages by entering the following command.

device(config)#ip multicast verbose-off

Syntax: [no] ip multicast verbose-off

Configuring static router ports

The Brocade device forwards all multicast control and data packets to router ports which receive queries. Although router ports are learned, you can force multicast traffic to specified ports even though these ports never receive queries. To configure static router ports, enter the following commands.

device(config)#vlan 70

device(config-vlan-70)#multicast router-port ethernet 4 to 5 ethernet 8

Syntax: [no] multicast router-port ethernet port [ethernet port to port]

To specify a list of ports, enter each port as ethernetport followed by a space. For example, ethernet 1/24 ethernet 6/24 ethernet 8/17.

To specify a range of ports, enter the first port in the range as ethernetport followed by the last port in the range. For example, ethernet 1/1 to 1/8 .

You can combine lists and ranges in the same command. For example: enable ethernet 1/1 to 1/8 ethernet 1/24 ethernet 6/24 ethernet 8/17.

Turning off static group proxy

If a device has been configured for static groups, it acts as a proxy and sends membership reports for the static groups when it receives general or group-specific queries. When a static group configuration is removed, it is deleted from the active group table immediately. However, leave messages are not sent to the querier, and the querier must age out the group. Proxy activity can be turned off. The default is on. To turn proxy activity off for VLAN 20, enter the following commands.

device(config)#vlan 20 device(config-vlan-20)#multicast proxy-off

Syntax: [no] multicast proxy-off

Enabling IGMP V3 membership tracking and fast leave for the VLAN

IGMP V3 gives clients membership tracking and fast leave capability. In IGMP V2, only one client on an interface needs to respond to a router's queries. This can leave some clients invisible to the router, making it impossible to track the membership of all clients in a group. When a client leaves the group, the device sends group-specific queries to the interface to see if other clients on that interface need the data stream of the client who is leaving. If no client responds, the device waits a few seconds before it stops the traffic. You can configure the wait time using the ip multicast leave-wait-timecommand.

IGMP V3 requires every client to respond to queries, allowing the device to track all clients. When tracking is enabled, and an IGMP V3 client sends a leave message and there is no other client, the

24	FastIron Ethernet Switch IP Multicast Configuration Guide
	53-1003085-02