User guide

Building Your Canopy Network March 2005
Through Software Release 6.1
Issue 1 Page 251 of 425
Canopy System User Guide
Bridge Entry Timeout
Specify the appropriate bridge timeout for correct network operation with the existing
network infrastructure. Timeout occurs when the BHM encounters no activity with the
BHS (whose MAC address is the bridge entry) within the interval that this parameter
specifies. The Bridge Entry Timeout should be a longer period than the ARP (Address
Resolution Protocol) cache timeout of the router that feeds the network.
This parameter governs the timeout interval, even if a router in the system has a longer
timeout interval. The default value of this field is 25 minutes.
CAUTION!
An inappropriately low Bridge Entry Timeout setting may lead to
temporary loss of communication with some end users.
Frame Timing Pulse Gated
If this BHS extends the sync pulse to a BHM or an AP, select either
◦ Enable—If this BHS loses sync, then do not propagate a sync pulse to the BHM
or AP. This setting prevents interference in the event that the SM loses sync.
◦ Disable—If this BHS loses sync, then propagate the sync pulse to the BHM or
AP.
See Wiring to Extend Network Sync on Page 294.
Power Control
In Release 4.1 and later releases, select either
◦ Low to set the BHS to operate at 18 dB less than full power to reduce the
possibility of self-interference with a nearby module.
◦ Normal to allow the BHS to operate at full power.
CAUTION!
Selection of Low can cause a link to a distant BHM to drop. If a link
drops when Power Control is set to low, the link can be re-established by
only Ethernet access.
If you select Low and save the changes and reboot the AP, you should immediately open
the Link Test page and perform a link test.
Community String
Specify a control string that allows a NMS (Network Management Station) to access MIB
information about this BHS. No spaces are allowed in this string. The default string is
Canopy.