User's Manual Part 3
Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegulatoryReview 307
Community String
Specify a control string that allows Prizm or a Network Management Station (NMS) to
access the module through SNMP. No spaces are allowed in this string. The default
string is Cyclone.
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. Prizm or
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 1 to 10
Specify ten or fewer IP addresses (xxx.xxx.xxx.xxx) to which trap information should be
sent. Trap information informs Prizm or an NMS that something has occurred. For
example, trap information is sent
• after a reboot of the module.
• when Prizm or 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.
Read Permissions
Select Read Only if you wish to disallow any parameter changes by Prizm or an NMS.