XG700 User's Guide
105/266
All Rights Reserved, Copyright (C) PFU LIMITED 2005-2006
5.7.2 link-aggregation
Function
The link aggregation is a function to show multiple ports among switches as a logical link (aggregation group). This command
is used to set a link aggregation.
There are two types of link aggregation: static link aggregation and LACP.
Static link aggregation
An aggregation group is created statically.
LACP link aggregation
An aggregation group in compliance with IEEE802.3ad LACP (Link Aggregation Control Protocol) is created. LACP is a
control protocol among switches for dynamically assembling an aggregation group.
Use the no form to delete an aggregation group.
Prompt
xg(config)#
Command syntax
link-aggregation agg-port <1-6> [protocol {none | lacp}] [lacp-mode {active | passive}]
[load-balance {dst-mac | src-mac | dst-src-mac}] [ distibution-parameter <0-3> ]
[minimum-port <1-12>] port <1-12> <1-12> [ <1-12> ]
no link-aggregation agg-port <1-6>
Parameter
agg-port <1-6>
Specifies the aggregation group number to create. Specify with a number in the range of 1 to 6.
protocol {none | lacp}
Specifies the protocol type of the link aggregation.
−
none
Comprises a static link aggregation.
−
lacp
Comprises a link aggregation, using IEEE802.3ad LACP as the control protocol among switches.
When this parameter is omitted, "none" is specified.
lacp-mode {active | passive}
Specifies the operation mode of LACP negotiation.
−
active
Negotiation of LACP protocol is started from the XG700. Also, since the active mode can receive LACP
protocol, connection of LACP is possible in the combination of active-active.
−
passive
The XG700 will be in the exclusively passive mode of LACP protocol. Although it responds to LACP packets,
the XG700 will not start negotiation.
This parameter can be specified only when "lacp" is specified to "protocol" parameter.
When this parameter is omitted, "active" is specified.
load-balance { dst-mac | src-mac | dst-src-mac }
Specifies the frame distribution method to each port which comprising the aggregation group
−
dst-mac
Determines the forwarding destination port, based on the destination MAC address of frames.
−
src-mac
Determines the forwarding destination port, based on the MAC address from which frames are sent.
−
dst-src-mac
Determines the forwarding destination port, based on the information of the destination MAC address of a
frame and the MAC address from which a frame is sent.
When this parameter is omitted, "dst-mac" is specified.
If there are not many MAC addresses to be distributed on an aggregation group, the distribution
among 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, it is recommended that you use either "src-mac" or "dst-src-mac".
As for the inclination of frame forwarding destination, the traffic state of each port can be checked by
"monitor traffic-bytes" or "monitor traffic-counts."
distribution-parameter <0-3>
Specifies a parameter used in calculation of frame distribution method.
When this parameter is omitted, "0" is specified.
Under certain circumstances, the inclination of the forwarding destination port may not be dissolved,
even when the distribution method is changed. By changing this parameter, the inclination may be
even smaller.
However, this function is to change the distribution patterns, and it does not guarantee dissolution of
inclinations.