User`s manual

SIP User's Manual 14. SNMP-Based Management
Version 5.0 319 December 2006
The following procedure assumes that there is at least one configured read-write
community. There is currently only one Trusted Manager. The taglist for columns for all
rows in the srCommunityTable are currently set to MGR. This procedure must be
performed from the final Trusted Manager.
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To delete the final Trusted Manager, take these 2 steps:
1. Set the value of the TransportLabel field on each row in the srCommunityTable to the
empty string.
2. Remove the appropriate row from the snmpTargetAddrTable
The change takes effect immediately. All managers can now access the device.
14.8.4 SNMP Ports
The SNMP Request Port is 161 and the Trap Port is 162. These ports can be changed by
setting parameters in the device ini file. The parameter name is:
SNMPPort = <port_number>
Valid UDP port number; default = 161
This parameter specifies the port number for SNMP requests and responses. Usually, it
should not be specified. Use the default.
14.8.5 Multiple SNMP Trap Destinations
An agent can send traps to up to five managers. For each manager, set the manager’s IP
address, receiving port number, and enable sending traps to that manager.
The user also has the option of associating a trap destination with a specific SNMPv3 USM
user. Traps are then sent to that trap destination using the SNMPv3 format and the
authentication and privacy protocol configured for that user.
To configure the trap managers table use:
 The Embedded Web Server, refer to Section 5.6.6.1 on page 178.
 The ini file, refer to Section 14.8.1.1 below.
 SNMP, refer to Section 14.8.1.3 on page 314.
14.8.5.1 Configuring Trap Manager via Host Name
One of the five available SNMP managers can be defined using a FQDN. In the current
version, this option can only be configured via the ini file (SNMPTrapManagerHostName).
The gateway tries to resolve the host name at start up. Once the name is resolved (IP is
found), the resolved IP address replaces the last entry in the trap manager table (defined
by the parameter ‘SNMPManagerTableIP_x’) and the last trap manager entry of
snmpTargetAddrTable in the snmpTargetMIB. The port is 162 (unless specified otherwise),
the row is marked as ‘used’ and the sending is ‘enabled’.
When using 'host name' resolution, any changes made by the user to this row in either
MIBs are overwritten by the gateway when a resolving is redone (once an hour).
Note that several traps may be lost until the resolving is complete.