Administrative State Control; Node Maintenance; Graceful Shutdown - AudioCodes Mediant 1000 User Manual

•
After the STUN client has discovered a NAT (any NAT).
•
If the STUN client can not contact a STUN server.
Note:
The manager can see the NAT type in the MIB:
audioCodes(5003).acProducts(9).acBoardMibs(10).acSystem(10).acSystemStatus(2).
acSysNetwork(6).acSysNAT(2).acSysNATType(1)
The manger also has access to the STUN client configuration:
audioCodes(5003).acProducts(9).acBoardMibs(10).acSystem(10).acSystemConfigura
tion(1).acSysNetworkConfig(3).acSysNATTraversal(6).acSysSTUN(21)
acNATTraversalAlarm - When the NAT is placed in front a device is identified as a
symmetric NAT - this alarm is raised. It is cleared when a non-symmetric NAT or no
NAT replace the symmetric one.
8.2

Administrative State Control

8.2.1

Node Maintenance

Node maintenance for the Mediant 1000 is provided via an SNMP interface. The
acBoardMIB provides two parameters for graceful and forced shutdowns of the Mediant
1000. (Refer to the note in "Graceful Shutdown" below.) These parameters are in the
acBoardMIB as acgwAdminState and acgwAdminStateLockControl.
The acgwAdminState is used either to request (set) a shutdown (0), undo shutdown (2), or
to view (get) the gateway condition (0 = locked, 1 = shutting down, 2 = unlocked).
The acgwAdminStateLockControl is used to set a time limit for the shutdown (in seconds)
where 0 means shutdown immediately (forced), -1 means no time limit (graceful) and x
where x>0 indicates a time limit in seconds (timed limit is considered a graceful shutdown).
The acgwAdminStateLockControl should be set first followed by the acgwAdminState.
8.2.2

Graceful Shutdown

acgwAdminState is a read-write MIB object. When a get request is sent for this object, the
agent returns the current board administrative state.
Note:
The possible values received on a get request are:
locked(0) - The board is locked
shuttingDown(1) - The board is in the process of performing a graceful lock
unlocked(2) - The board is unlocked
User's Manual
The two latter options require the STUN client be enabled (ini file parameter
–
Also, once the acKeepAlive trap is instigated it does not stop.
Graceful shutdown is currently supported in MEGACO (H.248) only.
132
Digital Mediant 1000
EnableSTUN).
Document # LTRT-66401