3com 4500 26-PORT Manuel D’Utilisation

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Interface

Output interface, through which the data packet destined for the 
destination network is sent

Vlinkindex

Virtual link index

State

Route state description:

ActiveU — The route is selected and is optimum 

Blackhole — Blackhole route is similar to Reject route, but it will not 
send the ICMP unreachable message to the source end 

Delete — The route is deleted

Gateway — Identifies that the route is not an interface route 

Hidden — The route exists, but it is unavailable temporarily for some 
reasons (e.g., configured policy or interface is Down). Moreover, you 
do not wish to delete it. Therefore, you need to hide it, so as to 
restore it again later 

Holddown — 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 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

Int — The route is discovered by interior gateway protocol (IGP)

NoAdvise — The routing protocol does not redistribute NoAdvise 
route when it redistributes routes based on the policy

NotInstall — The routing protocol generally selects the route with the 
highest precedence from its routing table, then places it 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

Reject — Unlike the normal routes, the Reject route will discard the 
packets that select it as their route, and the router will send ICMP 
unreachable message to the source end. Reject route is usually used 
for the network test 

Retain — When the routes from the routing table are deleted, the 
routes with Retain flag will not be deleted. Using this function you can 
set Retain flag for some static routes, so that they can exist in the core 
routing table

Static — The route with Static flag will not be cleared from the 
routing table after you save it and reboot the router. Generally, the 
static route configured manually in the router belongs to a Static 
route

Unicast — Unicast route

Age

Time to live

Cost

Value of cost

Tag

Tag of the route

Table 18    Output Description of the 

 Command