User's Manual Part 3
Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegulatoryReview 324
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 BHS. 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 BHS,
presuming that the device supplies the correct Community String value.
The default treatment is to allow all networks access (set to 0). For more information on
CIDR, execute an Internet search on “Classless Interdomain Routing.”
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.
Read Permissions
Select Read Only if you wish to disallow Prizm or NMS SNMP access to configurable
parameters and read-only fields of the SM.
Site Name
Specify a string to associate with the physical module. This parameter is written into the
sysName SNMP MIB-II object and can be polled by Prizm or an NMS. The buffer size for
this field is 128 characters.
Site Contact
Enter contact information for the module administrator. This parameter is written into the
sysContact SNMP MIB-II object and can be polled by Prizm or an NMS. The buffer size
for this field is 128 characters.
Site Location
Enter information about the physical location of the module. This parameter is written into
the sysLocation SNMP MIB-II object and can be polled by Prizm or an NMS. The buffer
size for this field is 128 characters.