Huawei quidway s3526 series Getting Started page 202

Command Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
Field
State
Age
Cost
Route state description:
ActiveU The route is selected and is optimum
Blackhole route is similar to Reject route, but it will not
Blackhole
send the ICMP unreachable message to the source end
Delete The route is deleted
Gateway Identifies that the route is not an interface route
The route exists, but it is unavailable temporarily for
some reasons (e.g., configured policy or interface is
Hidden
Down). Moreover, you do not wish to delete it. Therefore,
you need to hide it, so as to restore it again later
Holddown is one kind of route redistribution policy
adopted by some distance-vector (D-V) routing protocols
(e.g., RIP), through which these routing protocols can
avoid the flooding of error routes and deliver the routing
Holddown unreachable message accurately. For example, the RIP
redistributes a certain route every a period of time
regardless of whether the actually found routes destined
for the same destination change. For more details, refer
to the specific routing protocols.
The route is discovered by interior gateway protocol
Int
(IGP).
The routing protocol does not redistribute NoAdvise
NoAdvise
route when it redistributes routes based on the policy.
The routing protocol generally selects the route with the
highest precedence from its routing table, then places it
NotInstall in its core routing table and redistributes it. Although the
NotInstall route cannot be placed in the core routing
table, it is possibly that it is selected and redistributed.
Unlike the normal routes, the Reject route will discard the
packets that select it as their route, and the router will
Reject
send ICMP unreachable message to the source end.
Reject route is usually used for the network test
When the routes from the routing table are deleted, the
routes with Retain flag will not be deleted. Using this
Retain
function you can set Retain flag for some static routes, so
that they can exist in the core routing table.
The route with Static flag will not be cleared from the
routing table after you save it and reboot the router.
Static
Generally, the static route configured manually in the
router belongs to a Static route.
Unicast Unicast route
Time to live
Value of the cost
Huawei Technologies Proprietary
1-5
Chapter 1 Static Route Configuration Commands
Description