Alcatel-Lucent 7750 Configuration Manual page 511

the primary port.
Values
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 subgroup
since momentarily all ports are down in a LAG (break-before-make).
Values
port-threshold
Syntax port-threshold value [action {dynamic-cost | down}
no port-threshold
Context config>lag lag-id
Description This command configures the behavior for the Link Aggregation Group (LAG) if the number of operational
links is equal to or below a threshold level.
The no form of this command reverts to the default values.
Default 0 action down
Parameters value — The decimal integer threshold number of operational links for the LAG at or below which the con-
figured action will be invoked. If the number of operational links exceeds the port-threshold value, any
action taken for being below the threshold value will cease.
Values
action {dynamic-cost | down} — Specifies the action to take if the number of active links in the LAG is at
or below the threshold value.
When the dynamic-cost action is specified, then dynamic costing will be activated. As a result the LAG
will remain operationally up with a cost relative to the number of operational links. The link will only
be regarded as operationally down when all links in the LAG are down.
When the down action is specified, then the LAG will be brought operationally down if the number of
operational links is equal to or less than the configured threshold value. The LAG will only be regarded
as up once the number of operational links exceeds the configured threshold value.
port-type
Syntax port-type {standard | hsmda}
7750 SR Interface Configuration Guide
1 — 65535
1 — 8 identifies a LAG subgroup.
The auto-iom subgroup is defined based on the IOM (all ports of the same IOM are
assigned to the same subgroup).
The auto-mda subgroup is defined based on the MDA. (all ports of the same MDA are
assigned to the same subgroup).
0 — 63
Interface Configuration
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