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Reference Guide for the Centillion 50/100 and Model 5000BH Switches
1-50
893-01006-C
Using LECS Redundancy
If you choose to provide multiple LECS ATM addresses that the LEC may use,
make sure that all configurations for the respective LECSs are equal. The ELAN
name and LES ATM address must be the same in both LECSs. Different name and
address information implies that clients talking to a different LECS are placed on
a different ELAN. To take advantage of this redundancy, configure the LEC to use
more than a single LECS. LANE virtual ports allow this feature.
Using the LES/BUS Directly
To direct a LEC to use a LES/BUS directly, configure the LEC to use the ATM
address of the specific LES/BUS desired. One advantage of making the LES/BUS
configuration directly is that the LECS configuration step is saved during startup
and failure-mode recovery.
Using LES/BUS Redundancy
The cooperating LES/BUS feature within the Centillion 50/100 and Model
5000BH switches allows you distributed and redundant LES/BUS functionality
for a given ELAN. To achieve redundancy, configure LES/BUS entities within
separate switches. Within a switch, identify the other LES/BUS pairs in other
Centillion 50/100 and Model 5000BH switches and assign a unique server ID to
the LES/BUS pair cooperating with them.
To take advantage of redundancy, configure the LEC to use an ordered list of LES/
BUS addresses in the event of failure. LANE virtual ports allow this feature. To
take advantage of the distributed capabilities, point different LECs to different
LES/BUS pairs to distribute the load.
Note:
ELAN names are case sensitive. ELAN1 is different from elan1.