HP Comware 5 Debug Manual Vol 3

Field
Description
Candidate nexthop reason, update backup nexthop
In FRR auto-mode, the candidate next hop is selected
because it is more optimal than the old backup next
hop.
The reasons why the candidate next hop is selected as
the route backup next hop include the following:
• Is loop-free.
• Is primary.
• Is node-protect.
• Is link-protect.
• Is downstream.
• Is closer to destination.
• Has smaller IP address.
Candidate nexthop reason, drop candidate nexthop
In FRR auto-mode, the old backup next hop is reserved
because it is more optimal than the candidate next
hop.
The reasons why the candidate next hop is discarded
include the following:
• Is not loop-free.
• Is not primary.
• Is not node-protect.
• Is not link-protect.
• Is not downstream.
• Is not closer to destination.
• Has larger IP address.
router-rotue-type route, dest dest-id ,nh next-hop,bnh
backup-next-hop ,attr-list
In FRR auto-mode, the result of calculating the backup
next hop for intra-area routes of the router type is
listed.
• router-route-type—Router type, which can be
ABR, ASBR, ABR/ASBR, or Rtr.
• dest-id—Destination IP address.
• next-hop—Next hop address.
• backup-next-hop—Backup next hop address.
• attr-list—List to which the route belongs. The value
can be link (link protection), node (node
protection), or primary (primary next hop).
net-rotue-type route, dest-id /mask-len,Inherit backup
nexthop
In FRR auto-mode, the intra-area routes of the network
type inherit the backup next hop of the router-type
routes of the corresponding advertiser.
• net-route-type—Network type, which can be
Transit or Stub.
• dest-id—Destination IP address.
• mask-len—Mask length.
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