Multilink Trunking Configuration Rules - Nortel BayStack 350 Series Manual

MultiLink Trunking Configuration Rules

The MultiLink Trunking feature is deterministic; that is, it operates according to
specific configuration rules. When creating trunks, consider the following rules
that determine how the MultiLink trunk reacts in any network topology:
1.
2.
3.
4.
5.
6.
7.
8.
Note: A removed trunk member does not rejoin the trunk if it is then reset to
Enabled. The removed trunk member has to be reconfigured through the Trunk
Configuration screen to rejoin the trunk.
9.
10.
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Any port that participates in MultiLink Trunking must be an active port (set to
Enabled via the Port Configuration screen or through network management).
All trunk members must be configured into the same VLAN before the Trunk
Configuration screen's Trunk Status field can be set to Enabled (See "VLAN
Configuration" on page 3-34).
When an active port is configured in a trunk, the port becomes a trunk member
as soon as the Trunk Status field is set to Enabled. After the Trunk Status field
is set to Enabled, the spanning tree parameters for the port will change to
reflect the new trunk settings.
If spanning tree participation of any trunk member is changed (enabled or
disabled), the spanning tree participation of all members of that trunk is
changed similarly (see
When a trunk is enabled, the trunk spanning tree participation setting takes
precedence over that of any trunk member. When a trunk is active, the trunk
STP setting can be changed from either the Inter-Switch Trunk Configuration
screen or the Spanning Tree Configuration screen.
Only five VLANs are allowed when MultiLink Trunking is active.
If the VLAN settings of any trunk member are changed, the VLAN settings of
all members of that trunk are changed similarly.
When any trunk member is set to Disabled (not active) through the Port
Configuration screen or through network management, the trunk member is
removed from the trunk. A screen prompt precedes this action.
A trunk member cannot be configured as a monitor port (see "Port Mirroring
Configuration" on page 3-48).
Trunks cannot be monitored by a monitor port; however, trunk members can
be monitored (see "Port-Based Mirroring
"Spanning Tree Considerations" on
Configuration" on
Getting Started
page 1-42).
page 1-46).
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