Configuring LAN Emulation Services
LANE Redundancy
Planning and Setup
Guidelines
primary LES is actually down and activate the backup LES upon completion of the vital checks. These vital checks only take a few seconds
Quick LANE redundancy mode is recommended for most networks.
When the Quick LANE redundancy mode is not selected, the LANE redundancy monitoring software will perform a more comprehensive evaluation of the failed ELAN by checking the status of every LAN Emulation Client (LEC) within the failed ELAN, status of the switch where the primary LES resides before the LANE redundancy monitor activates the backup LES. This is recommended only you want every aspect of the ELAN to be checked before a backup LES/BUS is activated. Under working in this mode, depending on the size of the network, the LES/BUS redundancy could take
In addition to all the parameters configured from this window, an additional timeout parameter must be configured in a file called “protimeout.cnf” located in the /usr/ATMVLAN/runtime/cnf directory. This timeout parameter determines the amount of time the LANE redundancy monitoring software should wait before performing any LANE service checks upon failure of a LES/BUS. This timeout allows for the VCCs to ageout and the network to return to study state.
In the Quick LANE redundancy mode, this timeout parameter in this file should be set to “5” seconds. When the quick LANE redundancy mode is not selected, this parameter should be set to 120 seconds if there are no redundant Switch Engines in the network and 333 seconds (default), if there are redundant Switch Engines in the network.
Transcend Management Software supports the configuration/setup and activation of the LANE Service (LES/BUS and LECS) redundancy feature.
The following lists guidelines to help you set up the LANE Redundancy mechanism:
1ATM address structure and physical network connectivity should allow for ATM route recovery for cases of switch or link failure.
2The primary and backup LES for an ELAN should not be on the same switch.
3The primary LECS should not be configured on a switch with primary LESs.
