microloop-avoidance
Use this command to enable microloop avoidance using ordered FIB (oFIB) for an ISIS process.
Use the no form of this command to disable microloop avoidance for an ISIS process.
Microloop avoidance will be enabled with default hold-timer and max-fib values if it is not configured by the user:
• Default value of hold-timer is 6 seconds
• Default value for max-fib is 2 seconds
Microloop avoidance has to be enabled in conjunction with a fast reroute (FRR) mechanism such as TILFA that converts a sudden link or node failure into a non-urgent topology change by having complete repair path for all affected destinations. With microloop avoidance, the convergence will be slower compared to traditional (SPF) convergence mechanisms. So, when there is any failure of a link or a set of links that are not protected using an FRR mechanism, it is advised to use conventional SPF (faster) mode of operation to minimize packet loss during convergence/reconvergence.
Command Syntax
microloop-avoidance (level-1|level-2)
no microloop-avoidance (level-1|level-2)
Parameters
level-1
Level-1 only
level-2
Level-2 only
Defaults
N/A
Command Mode
ISIS router mode
Applicability
This command was introduced in OcNOS version 6.3.0.
Examples
#configure terminal
(config)#router isis 100
(config-router)#microloop-avoidance level-1
(config-router)#microloop-avoidance level-2
(config-router)#
#configure terminal
(config)#router isis 100
(config-router)#no microloop-avoidance level-1
(config-router)#no microloop-avoidance level-2
(config-router)#
Last modified date: 08/28/2023