User guide

March 2005 Building Your Canopy Network
Through Software Release 6.1
Page 242 of 425 Issue 1
Canopy System User Guide
The Community String value is clear text and is readable by a packet monitor.
Additional security derives from the configuration of the Accessing Subnet, Trap
Address, and Permission parameters.
Accessing Subnet
Specify the addresses that are allowed to send SNMP requests to this BHM. The NMS
has an address that is among these addresses (this subnet). You must enter both
◦ The network IP address in the form xxx.xxx.xxx.xxx
◦ The CIDR (Classless Interdomain Routing) prefix length in the form /xx
For example
◦ the /16 in 198.32.0.0/16 specifies a subnet mask of 255.255.0.0 (the first 16 bits
in the address range are identical among all members of the subnet).
◦ 192.168.102.0 specifies that any device whose IP address is in the range
192.168.102.0 to 192.168.102.254 can send SNMP requests to the BHM,
presuming that the device supplies the correct Community String value.

NOTE:
For more information on CIDR, execute an Internet search on “Classless
Interdomain Routing.”
The default treatment is to allow all networks access.
Trap Address
Specify the IP address (xxx.xxx.xxx.xxx) of a Network Management Station (NMS) to
which trap information should be sent. Trap information informs the NMS that something
has occurred. For example, trap information is sent
◦ after a reboot of the module.
◦ when an NMS attempts to access agent information but either
− supplied an inappropriate community string or SNMP version number.
− is associated with a subnet to which access is disallowed.
Trap Enable
Select either Sync Status or Session Status to enable SNMP traps. If you select
neither, then traps are disabled.
Permission
Select Read Only if you wish to disallow any parameter changes by the NMS.
Update Application Address
For capabilities in future software releases, you can enter the address of the server to
access for software updates on this BHM.