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.
Note 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.
Operation
Initialization Sequence
3-10
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