Home » Cisco » 400-201 » Which description is true of that the fast-reroute keep all paths command accomplishes when used under OSPF process?
Which description is true of that the fast-reroute keep all paths command accomplishes when used under OSPF process?
A. All possible alternate routes are installed in the OSPF RIB, even if the alternate paths do not meet the LFA criteria (the LFA inequalities)
B. By default, only the /32 routes have a backup path installed. This command creates a backup path for the router with any subnet mask.
C. Besides the regular LFA backup paths, this command also installs the remote LFA backup paths.
D. All backup routes ?not only the best backup route are installed in the OSPF RIB.
Correct Answer: D
Explanation/Reference:
http://www.cisco.com/c/en/us/td/docs/ios- xml/ios/iproute_ospf/configuration/xe-3s/iro-lfa-frrxe.pdf Candidate Repair-Path Lists When OSPF computes a repair path, it keeps in the local RIB only the best from among all the candidate paths, in order to conserve memory. You can use the fast-reroute keepall- paths command to create a list of all the candidate repair paths that were considered. This information can be useful for troubleshooting but it can greatly increase memory consumption so it should be reserved for testing and debugging.
