Locking / Unlocking a Routing Server

The ARM allows network operators to lock routing servers, for troubleshooting or maintenance purposes. Locking a routing server causes the devices to disconnect from the locked routing server, causing all traffic to divert to the other unlocked and available servers. Unlocking a routing server causes the devices to reconnect, and makes the routing server fully functional.

A locked routing server can also be associated with ARM nodes (SBCs / Media Gateways) without participation in calls routing. This can be useful during the preparation phase for network setup.

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To lock or unlock a Routing Server:

Open the Routing Servers page (Settings > Routing Servers) as shown previously.

Determine from the icon under the 'Administrative State' column whether a routing server is locked or unlocked, and then click the Lock / Unlock button.

An unlock performs a restart of the Routing Manager software. The action takes a few seconds, during which time the Routing Manager is unavailable due to the restart.

A lock action is immediate.

These actions can be applied to any particular ARM router. The functionality lets you gracefully take a router temporarily out of service. A locked router responds to all keep-alive and login requests, from all nodes, with a standard 'Service Unavailable' HTML error. This behavior causes all nodes to be disconnected from the router, effectively taking the router out of service. The router still responds to any other request from the nodes or the configurator, which makes the lock action graceful since calls, statistical calculations and software upgrades are unaffected.