R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

6
You can assign Layer 2 Ethernet interfaces only to a Layer 2 aggregation group, and Layer 3 Ethernet
interfaces only to a Layer 3 aggregation group.
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 user traffic.
• Unselected—An Unselected port cannot forward user traffic.
When a Selected port fails, an Unselected port can become a Selected port and forward user 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 member ports are assigned the same operational key.
Configuration classes
Every configuration setting on a port might affect its aggregation state. Port configurations include the
following classes:
• Port attribute configurations—Include port rate, duplex mode, and link status (up or down). These
are the most basic port configurations.
• Class-two configurations—A member port can be placed in Selected state only if it has the same
class-two configurations as the aggregate interface. Class-two configurations made on an
aggregate interface are automatically synchronized to all its member ports. These configurations
are retained on the member ports even after the aggregate interface is removed.
Table 1 Class-two configurations
Feature Considerations
Port isolation
Whether the port has joined an isolation group, and the isolation group to which
the port belongs.
QinQ
QinQ enable state (enable/disable), TPID for VLAN tags, outer VLAN tags to be
added, inner-to-outer VLAN priority mappings, inner-to-outer VLAN tag
mappings, inner VLAN ID substitution mappings.
VLAN
Permitted VLAN IDs, PVID, link type (trunk, hybrid, or access), IP subnet-based
VLAN configuration, protocol-based VLAN configuration, VLAN tagging mode.
MAC address learning
MAC address learning capability, MAC address learning limit, forwarding of
frames with unknown destination MAC addresses after the MAC address
learning limit is reached.
NOTE:
A
ny class-two configuration change might affect the aggregation state of link a
gg
re
g
ation member ports
and ongoing traffic. To be sure that you are aware of the risk, the system displays a warning message
every time you attempt to change a class-two configuration setting on a member port.
• Class-one configurations—Include settings that do not affect the aggregation state of the member
port even if they are different from those on the aggregate interface. GVRP and the spanning tree
settings are examples of class-one configurations. The class-one configuration of a member port is
effective only when the member port leaves the aggregation group.