Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 657)

GMAP
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Configuring GMAP
GMAP is inactive by default. In addition to enabling and disabling GMAP , you can configure
the time between packet transmissions (when multiple packets are required for an update),
the time between updates, and the length of time
GMAP will retain its current information.
Enabling and Disabling GMAP
Use the gmapst command to display or change the state of GMAP . A prompt similar to the
following displays:
GMAP is currently INACTIVE. (a)ctivate, (d)e-activate: (d)
Enter a or d or press <Enter> to keep the current value. A message similar to the following
displays:
GMAP is ACTIVE.
To change the state of GMAP without displaying the current state first, enter the command
with the desired value. For example:
gmapst d
The following message displays:
GMAP is INACTIVE.
Configuring the Gap Time
Use the gmapgaptime command to display or change the interpacket gap time used when
multiple packets are required for an update. When there are many MAC addresses on mobile
ports, more than one GMAP packet is required for an update. Typically the gap time does not
have to be changed, but you may want to modify it if traffic spikes are occurring in the
network.
To view the current gap time, enter the following command:
gmapgaptime
A message similar to the following displays:
GMAP Gap Time is 133 milliseconds.
To change the gap time, enter the command with the desired value (any value between 0 and
65535). For example:
gmapgaptime 100
A message displays similar to the following:
GMAP Gap Time is 100 milliseconds.
The switch approximates the gap time because its internal clock does not use milliseconds. For
any value shorter than one second, the switch uses 1/60 second increments called “ticks.” The
default for gap time is 8 ticks or approximately 133 milliseconds. Any value you enter will be
rounded to the nearest tick.