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XG2000 series User's Guide
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All Rights Reserved, Copyright (C) PFU LIMITED 2009
4.4.2 Frame Distribution Methods in Link Aggregation
How frames are distributed across physical ports that make up an aggregation group are determined by the contents of a
frame (source and destination MAC addresses).
There are three ways to specify how frames are distributed:
z Frame distribution based on destination MAC address (dst-mac)
The destination port is determined based on the destination MAC address of the frames.
z Frame distribution based on source MAC address (src-mac)
The destination port is determined based on the source MAC address of the frames.
z Frame distribution based on destination and source MAC addresses (dst-src-mac)
The destination port is determined based on the destination and source MAC addresses of the
frames.
z If there are too few MAC addresses to be distributed across an aggregation group, the distribution of
frames across the destination ports tends to become biased. To reduce such bias, use a distribution
method that uses more MAC addresses.
For example, if a server is connected to an aggregation group and a client is connected to a different
port, the "src-mac" or "dst-src-mac" parameters are recommended.
To set a distribution method, carry out the following procedure in the administrator EXEC mode.
Command Task
xg# configure terminal
Switch to global configuration mode.
xg(config)# link-aggregation agg-port <1-10>
protocol {none | lacp}
load-balance dst-mac|src-mac|dst-src-mac}
port <1-20> <1-20>
Specify a distribution method in the load-balance
parameter of the "link-aggregation" command.
xg(config)# exit
Exit to administrator EXEC mode.
4.4.3 The Number of Ports That Require Linkup
It is possible to specify the number of ports that enable a linkup state for an aggregation group. If the number of active ports
that make up an aggregation group in a linkup state is less than the specified number of ports, the aggregation group changes
to a linkdown state.
z For static link aggregation
If the number of ports that make up an aggregation group in a linkup state no longer satisfies
the specified number of ports, the aggregation group changes to a linkdown state.
z For LACP link aggregation
If the number of ports that make up an established LACP aggregation group changes, the
aggregation group reverts to a linkdown state.
To set the number of ports in the aggregation group, carry out the following procedure in the administrator EXEC mode.
Command Task
xg# configure terminal
Switch to global configuration mode.
xg(config)# link-aggregation agg-port
<1-10>
protocol {none | lacp} minimum-port <1-20>
port <1-20> <1-20>
Specify the required number of ports in "minimum-port"
parameter of the "link-aggregation" command.
The default value for "minimum-port" parameter is 1.
xg(config)# exit
Exit to administrator EXEC mode.