backup-selection (Protocols OSPF)
Syntax
backup-selection {
destination prefix {
interface (interface-name| all){
admin-group {
exclude [ group-name ];
include-all [ group-name ];
include-any [ group-name ];
preference [ group-name ];
}
bandwidth-greater-equal-primary;
dest-metric (highest | lowest);
downstream-paths-only;
metric-order [ root dest ];
node {
exclude [ node-address ];
preference [ node-address ];
}
protection-type (link | node | node-link);
root-metric (highest | lowest);
srlg (loose | strict);
evaluation-order [ admin-group srlg bandwidth protection-type node metric ] ;
}
}
}
Hierarchy Level
[edit logical-systems logical-system-name routing-options], [edit logical-systems logical-system-name routing-instances instance-name routing-options], [edit routing-instances instance-name routing-options], [edit routing-options]
Description
Define backup selection policies, per prefix per primary next-hop interface, to enforce loop-free alternate (LFA) selection based on admin-group, srlg, bandwidth, protection-type, node, and metric attributes of the backup path.
Options
| destination prefix | Define the backup selection policy for a particular destination prefix or for all the prefixes. The value prefix defines the destination prefix name and prefix length. You can specify 0/0 for the IPv4 least-specific prefix or 0::0/0 for the IPv6 least-specific prefix. |
| node | Define a list of loop-back IP addresses of the adjacent nodes to either prefer or exclude in the backup path selection. The node can be a local (adjacent router) node, remote node, or any other router in the backup path. Note:
The nodes are identified through the route-id advertised by a node in the LSP. |
| exclude [ node-address ] | Specify one or more nodes to be excluded. The backup path that has a router from the list is not selected as the loop-free alternative or backup next hop. |
| preference [ node-address ] | Define an ordered set of one or more nodes to be preferred. The backup path having the leftmost node is selected. |
The remaining statements are explained separately. See CLI Explorer.
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 15.1.