N o t e

Operation

Initialization Sequence

Initialization Sequence

Whenever the hub is powered on or reset, and whenever the router module is reset (page 3-5) or cleared (page 3-7), the router module goes through the following initialization sequence:

1.A self-test of the router module is run. If initiated by powering on or resetting the hub, the test can last up to 30 seconds (60 seconds if the hub had not previously been powered on with the SNMP module installed). If initiated by resetting or clearing the router module, the test lasts about 18 seconds. During the self-test, the Router Self-test LED is turned on.

If you boot the router using the NCL Boot command or the booting option in Quick Configuration, the initialization sequence begins at step 2.

2.The router module’s clock is reset to the time the router module was last running; or, if the Time Protocol’s Mode parameter for DoD Internet Router in the configuration is set to “Server only” or to “Server and client”, the time is set to the time found on a time server.

3.The router module’s operating code (software) is executed.

4.Dynamic variables (such as the counters and events) are reset.

5.The configuration is read from battery-backed RAM into active circuitry. This implements any configuration changes saved since the router module was last reset.

6.Communication is started with the WAN and the hub (through the router module’s internal LAN port) and with the routing applications that are configured. Bridging and routing tables are reset.

7.If the router module’s factory-default configuration is being used, the router module bridges on both ports (in IP host-only mode with an IP address of 127.x.x.x, without spanning tree). You may see activity reported on the Hub (LAN) Router Rx, Hub (LAN) Router Tx, WAN Rx, and WAN Tx LEDs.

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