Radiance 10/100 Mbps Services Line Card
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Manual Configuration
Regardless of the DHCP setting, IP addressing information can be
assigned manually. When manually entering the IP addressing infor-
mation via SNMP, you must also apply the changes by setting mosAdmi-
nApplyIPChanges to 1 in the METROBILITY-ADMIN-MIB. The R821 will
verify that the information you entered is valid and begin using the new
values if there are no problems. If for any reason there is a conflict, the
R821 will send a generic SNMP error.
Saving the IP information across power cycles depends on the DHCP
setting:
•
If DHCP is disabled, the new address will be stored and preserved. If
you want to save the addressing information through resets and power
cycles, make sure DHCP is disabled after the information is entered
successfully.
•
If DHCP is enabled, the R821 will enter the discovery mode at each
power cycle and attempt to obtain new IP addressing information. The
manually configured information will be maintained across a power
cycle only until a DHCP server assigns it a new IP address, or until
someone manually enters the IP addressing information again.
Default Value
To return the R821’s IP address, network mask, and gateway back their
factory default values, use the reset command and specify the default
option. Resetting the board using this method forces all software settings
back to their original values.
Start-up Failure
During the initial discovery mode, if a DHCP server is not found within
the timeout period
4
, the R821 will generate its own default IP addressing
information using Zero Configuration Networking (zeroconf) for local
intra-subnet communication. Once the default address is generated, the
R821 enters a probing phase to verify that the address is unique. If the
address is identical to one previously claimed by another device, the
R821 will generate a new address repeatedly until it is successful. The
default zeroconf IP address is in the 169.254.0.0 network, the network
mask is 255.255.0.0, and the gateway address is 0.0.0.0.
4.The timeout period depends on the number of retries. The timeout period is configurable from 4 sec-
onds (# of retries = 1) up to 124 seconds (number of retries = 5).
