Filter
Top Products
Configuring LAN Emulation Services 4-9
primary LES is actually down and activate the backup LES upon
completion of the vital checks. These vital checks only take a few seconds
(10-15 seconds) to complete.
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 3-5 minutes to complete.
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.
LANE Redundancy
Planning and Setup
Guidelines
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:
1 ATM address structure and physical network connectivity should allow for
ATM route recovery for cases of switch or link failure.
2 The primary and backup LES for an ELAN should not be on the same
switch.
3 The primary LECS should not be configured on a switch with primary
LESs.