fast-reroute tie-break
Use this command to set the tie-breaking policy for selecting a fast reroute repair path. You assign a priority to each type of repair path.
Use the no parameter with this command to set the tie-breaking policy for a specific type of repair path to its default priority. To set all types of repair paths to their default priorities, do not specify a repair path with the no form of this command.
Command Syntax
fast-reroute tie-break (primary-path|interface-disjoint|node-protecting|broadcast-interface-disjoint) index <1-10>
no fast-reroute tie-break
no fast-reroute tie-break (primary-path|interface-disjoint|node-protecting|broadcast-interface-disjoint) index <1-10>
Parameters
primary-path
Use a path from the Equal-Cost Multipath Path (ECMP) set. An ECMP found during the primary shortest path first (SPF) repair might not be desirable in networks where traffic exceeds the capacity of any single link.
interface-disjoint
Do not select point-to-point interfaces that have no alternate next hop for rerouting if the primary gateway fails, thus protecting the interface.
node-protecting
Bypass the primary-path gateway router which might not protect the router that is the next hop in the primary path.
broadcast-interface-disjoint
Do not use the interface if connected to a broadcast network. Repair paths protect links when a repair path and a protected primary path use different next-hop interfaces. However, on broadcast interfaces, if the repair path is computed via the same interface as the primary path, but their next-hop gateways are different, the router is protected but the link might not be.
index
Tie break priority. A lower value has higher preference.
<1-10>
Range of priority values.
Defaults
By default, LFA backup path is calculated based on interface-disjoint.
The default priority scheme is:
1. primary-path
2. interface-disjoint
3. node-protecting
4. broadcast-interface-disjoint
Command Mode
Router mode
Applicability
This command was introduced before OcNOS version 1.3.
Examples
#configure terminal
(config)#router ospf 200
(config-router)#fast-reroute tie-break interface-disjoint index 1
Last modified date: 07-13-2023