Nortel 450-24t 用户指南

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BayStack 450 10/100/1000 Series Switches
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All trunk members must have the same VLAN configuration before the Trunk 
Configuration screen’s Trunk Status field can be set to Enabled (see “VLAN 
Configuration Menu
” on page 3-44).
When an active port is configured in a trunk, the port becomes a trunk member 
when you set the Trunk Status field to Enabled. The spanning tree parameters 
for the port then change to reflect the new trunk settings.
If you change the spanning tree participation of any trunk member to Enabled 
or Disabled, the spanning tree participation of all members of that trunk 
changes similarly (see “Spanning Tree Considerations for MultiLink Trunks” 
on page 1-93).
When a trunk is enabled, the trunk’s spanning tree participation setting takes 
precedence over that of any trunk member. When a trunk is active, you can 
change the trunk STP setting from either the Trunk Configuration screen or 
the Spanning Tree Configuration screen.
If you change the VLAN settings of any trunk member, the VLAN settings of 
all members of that trunk change similarly.
When you set any trunk member to Disabled (not active) through the Port 
Configuration screen or through network management, the trunk member is 
removed from the trunk. The removed trunk member must be reconfigured 
through the Trunk Configuration screen to rejoin the trunk. A screen prompt 
precedes this action. You cannot disable a trunk member if there are only two 
members on the trunk.
You cannot configure a trunk member as a monitor port (see “Port Mirroring 
Configuration” on page 3-71
).
Trunks cannot be monitored by a monitor port; however, trunk members can 
be monitored (see “Port-Based Mirroring Configuration” on page 1-98).
All trunk members must have identical IGMP configurations.
If you change the IGMP snooping configuration for any trunk member, the 
IGMP snooping settings for all trunk members change.