Configuring LAN Emulation Services
When LAN Emulation redundancy is activated on the NMS, see Activating LANE Redundancy, and when a switch running the primary LES fails, the NMS detects the failure. For the description of failure resolution, see “LES Failure Resolution” on page
It is critical that the NMS be connected directly to the switch running the LECS or have direct access to this switch.
The LANE clients that go back to the Initial State (As per the LANE 1.0 Specification, the LECs have to go back to the Initial state when the connection to the LES fails.) then
LES Failure Resolution
To prevent the activation of the backup LES/BUS when the primary LES is actually active, the LANE Monitor software performs the following checks to verify the failure.
1Verifies that if any one LEC is in the operational state, the backup LES is not activated. The primary LES is assumed to be active one.
2Verifies that the switch running the primary LES is up and active. If this is not verifiable via direct SNMP contact, you can verify whether the switch is OK via the neighboring switches address tables.
If either check indicates a LES failure, the backup LES is activated. The LES failure resolution is reported as inconclusive. You can manually active the redundant LES.
These important steps ensure the integrity of LANE services and provide a robust and reliable recovery mechanism.
Pre-conditions for LANE Redundancy to Take Effect
Some LECs cannot bind to the backup LES even when they get the correct information about the backup LES from the LECS. This may occur because of problems related to route redundancy. It is important to ensure that ATM
