Chapter 9. X.25 Simple Network Management Protocol

With the AIX Licensed Program, is support for a Simple Network Management Protocol (SNMP) proxy agent . This support allows statistical data related to the X.25 interfaces to be gathered and transferred to an SNMP agent for analysis. The items of data gathered form a subset of the Management Information Base for X.25 specified in RFCs 1381 and 1382 . RFC 1381 covers the frame layer and 1382 the packet layer.

For more details on the individual MIB objects, refer to the appropriate RFCs.

Data collection from X.25 for SNMP is enabled and disabled by the config methods:

• Enabled at the time the first port is configured.
• Disabled at the time the last port is unconfigured.

Installation Notes for SNMP Multiplexer X.25 Peer Daemon (x25smuxd)

It is assumed that the snmpd is running and all the necessary software needed to ensure that the snmpd is properly functioning is installed and working. The X.25 proxy agent x25smuxd and the MIB defs file x25smuxd.defs resides in /usr/sbin directory. Before invoking x25smuxd by the config methods at the port configuration time, use the following installation procedure:

1. Obtain root user authority.
2. Check to see if the /usr/sbin/x25smuxd.defs file is installed.
3. In the /usr/sbin/x25smuxd.defs file, find the following line:

   -- object definitions compiled from RFC1381-MIB { iso 3 6 1 2 1 }

   Append every line from this line on to the end of the file to the bottom of the /etc/mib.defs file.
4. Add the following entry to the bottom of the /etc/snmpd.peers file:

   "x25smuxd"     1.3.6.1.2.1.10.16     "x25smuxd_password"

5. Add the following entry to the bottom of the /etc/snmpd.conf file:

   smux     1.3.6.1.2.1.10.16     x25smuxd_password     #x25smuxd

6. Refresh the snmpd daemon so that it rereads the /etc/snmpd.conf file with the following command:

   refresh -s snmpd

   Notes:

   1. Only run x25smuxd when you are logged in with root user authority.
   2. Never start more than one instance of x25smuxd as it can cause conflicts with the interprocess communication mechanism.
   3. Line status change notification is not implemented in this release of X.25 Licensed Program.

Frame Layer Objects

The following objects from RFC1381 are supported in read-only mode:

lapbOperIndex

lapbOperControlField

lapbOperTransmitN1FrameSize

lapbOperReceiveN1FrameSize

lapbOperTransmitKWindowSize

lapbOperReceiveKWindowSize

lapbOperN2RxmitCount

lapbOperT1AckTimer

lapbOperT2AckDelayTimer

lapbOperT3DisconnectTimer

lapbOperT4IdleTimer

lapbOperPortId

lapbFlowIfIndex

lapbFlowCurrentMode

lapbFlowRejOutPkts

lapbFlowRejInPkts

lapbFlowT1Timeouts

Packet Layer Objects

The following objects from RFC1382 are supported in read-only mode:

x25OperIndex

x25OperInterfaceMode

x25OperPacketSquencing

x25OperRestartTimer

x25OperCallTimer

x25OperResetTimer

x25OperClearTimer

x25OperWindowTimer

x25OperDataRxmtTimer

x25OperInterruptTimer

x25OperRejectTimer

x25OperRegistrationRequestTimer

x25OperRestartCount

x25OperResetCount

x25OperClearCount

x25OperDataRxmtCount

x25OperRejectCount

x25OperRegistrationRequestCount

x25OperNumberPVCs

x25OperDataLinkId