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Configuring LAN Emulation Services 4-15
a Move the ports in the backup ELAN to a temporary ELAN using the
VLAN move option. Then move the ports from the temporary ELAN to
the primary ELAN. It is important to first move to temporary ELAN first
and this temporary ELANID must be in the LECS database.
b Software reset the backup LES/BUS after modifying the database.
The software reset of the LES/BUS must be done via the Command Line
Interface of the CB7000. The software reset feature is only supported in
the CB7000 3.5 or later version.
3 Enable the Automatic LANE Redundancy.
LECS Redundancy The CoreBuilder 7000 switch supports LAN Emulation Configuration
Service. The LECS may be activated on more than one switch in the
network (up to 5).
Each CoreBuilder 7000 in the network is configured with the address of
the active LECS. The configuration of multiple active LECS addresses (up
to 5) is only possible using the LECS Select dialog box, upper part of the
Backbone and Services window.
One active LECS address can be entered via the command line interface
(LMA) and the remaining have to be set via the NMS. This limitation will
be eliminated in a future release of the CoreBuilder 7000 software.
How Do Lane Clients Take Advantage of Multiple LECSs?
If a LAN Emulation Client (LEC) uses the Well Known LECS Address (WKA)
to configure a direct connection to the LECS, the first CoreBuilder 7000 in
to which connection is established converts the WKA to the first active
LECS address (first among up to 5 LECS addresses programmed into the
CoreBuilder 7000 via the LMA and NMS). The CoreBuilder 7000 then
forwards this connection request to the active LECS. If the connection
setup fails, the CoreBuilder 7000 changes the WKA to the next active
LECS address and then tries to connect again. This process is continued
until an active LECS is reached. If none of the LECSs are reachable, then
the direct configuration setup request is rejected.
If a LAN Emulation client does not support the use of WKA, it may also
request the LECS addresses from the CoreBuilder 7000 via the ILMI and
try to reach the LECSs directly.