R0106-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V7)

NOTE:

The router supports only Layer 3 link aggregation in the current software version.

Aggregation states of member ports in an aggregation group

A member port in an aggregation group can be in either of the following aggregation states:

• Selected—A Selected port can forward traffic.

• Unselected—An Unselected port cannot forward traffic.

Operational key

When aggregating ports, the system automatically assigns each port an operational key based on port

information, such as port rate and duplex mode. Any change to this information triggers a recalculation

of the operational key.

In an aggregation group, all Selected ports are assigned the same operational key.

Configuration types

Every configuration setting on a port might affect its aggregation state. Port configurations include the

following types:

• Attribute configurations—To become a Selected port, a member port must have the same attribute

configurations as the aggregate interface. Table 1 describes the attribute configurations.

Attribu

te configurations made on an aggregate interface are automatically synchronized to all

member ports. These configurations are retained on the member ports even after the aggregate

interface is removed.

Any attribute configuration change might affect the aggregation state of link aggregation member

ports and running services. The system displays a warning message every time you try to change

an attribute configuration setting on a member port.

Table 1 Attribute configurations

Feature Considerations

Port isolation

Indicates whether the port has joined an isolation group, and the isolation

group to which the port belongs.

QinQ

QinQ enable state (enabled/disabled), TPID for VLAN tags, and VLAN

transparent transmission. For information about QinQ, see "Configuring

QinQ."

VLAN

VLAN attribute configurations include:

• Permitted VLAN IDs.

• PVID.

• Link type (trunk, hybrid, or access).

• VLAN tagging mode.

For information about VLAN, see "Configuring VLANs."

• Protocol configurations—Protocol configurations do not affect the aggregation state of the member

ports. MAC address learning and spanning tree settings are examples of protocol configurations.