Nortel business policy switch 2000, User Manual

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Chapter 2 Network configuration 133
Using the Business Policy Switch 2000 Version 2.0
IGMP snooping configuration rules
The IGMP snooping feature operates according to specific configuration rules.
When configuring your switch for IGMP snooping, consider the following rules
that determine how the configuration reacts in any network topology:
• A port that is configured for port mirroring cannot be configured as a static
router port.
• If a MultiLink Trunk member is configured as a static router port, all of the
MultiLink trunk members are configured as static router ports. Also, if a static
router port is removed, and it is a MultiLink Trunk member, all MultiLink
trunk members are removed as static router port members, automatically.
• Static router ports must be port members of at least one VLAN.
• If a port is configured as a static router port, it is configured as a static router
port for all VLANs on that port. The IGMP configuration is propagated
through all VLANs of that port.
• If a static router port is removed, the membership for that port is removed
from all VLANs of that port.
• The IGMP snooping feature is not STP-dependent.
• The IGMP snooping feature is not Rate Limiting-dependent.
• The snooping field must be enabled for the proxy field to have any valid
meaning.
• Static router ports are configured per VLAN and per IGMP Version.
For more information about using the IGMP snooping feature, refer to Chapter 1
for additional guidelines on configuring VLANs, IGMP, and spanning tree groups
and Chapter 3.
See also appendixes for configuration flowcharts that can help you use this
feature.
Note:
Because IGMP snooping is set up per VLAN, all IGMP changes
are implemented according to the VLAN configuration for the specified
ports.