Alcatel-Lucent 7710 SR SONET, Configuration Manual

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LAG Commands
Page 306 7710 SR OS Interface Configuration Guide
fast — Transmits packets every second.
lacp-xmit-stdby
Syntax [ no ] lacp-xmit-stdby
Context config>lag
Description
This command enables LACP message transmission on standby links.
The no form of this command disables LACP message transmission. This command should be disabled for
compatibility when using active/standby groups. This forces a timeout of the standby links by the peer. Use
the
no form if the peer does not implement the correct behavior regarding the lacp sync bit.
Default lacp-xmit-stdby
port
Syntax port port-id [ port-id … up to 16 total] [ priority priority ] [ subgroup sub-group-id ]
no port port-id [ port-id … up to 16 total]
Context config>lag lag-id
Description This command adds ports to a Link Aggregation Group (LAG).
The port configuration of the first port added to the LAG is used as a basis to compare to subsequently added
ports. If a discrepancy is found with a newly added port, that port will be not added to the LAG.
Up to 16 (space separated) ports can be added or removed from the LAG link assuming the maximum of 16
ports is not exceeded.
All ports, when added to a LAG, must share the same characteristics (speed, duplex, etc.). An error message
will be displayed when adding ports that do not share the same characteristics. Hold-timers down must be 0.
Ports that are part of a LAG must be configured with autonegotiate limited or disabled.
The no form of this command removes ports from the LAG.
Default No ports are defined as members of a LAG.
Parameters port-id — The port ID configured or displayed in the slot/mda/port format.
priority priority — Port priority used by LACP. The port priority is also used to determine the primary port.
The port with the lowest priority is the primary port. In the event of a tie, the smallest port ID becomes
the primary port.
Values 1 — 65535
subgroup sub-group-id — This parameter identifies a LAG subgroup. When using subgroups in a LAG,
they should only be configured on one side of the LAG, not both. Only having one side perform the
active/standby selection will guarantee a consistent selection and fast convergence. The active/standby
selection will be signalled through LACP to the other side. The hold time should be configured when
using subgroups to prevent the LAG going down when switching between active and standby links in
case no links are usable for a short time, especially in case a subgroup consists of one member.