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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 1 Static Route Configuration Commands
1-4
Field Description
Mask Mask
Protocol Routing protocol that detects this route
Preference Preference of the route
Nexthop Address of the next hop
Interface
Outbound interface where packets to the destination network segment
are forwarded.
Vlinkindex Virtual link index
Route state:
ActiveU Active unicast routes
Blackhole
Blackhole routes, which are similar to Reject routes
except that blackhole routes do not send ICMP
unreachable messages to the source end of the packet.
Delete The route is deleted.
Gateway Indirectly reachable routes
Hidden
If you do not want to remove some routes that are not
available temporarily for some reasons (such as the
configured polices, the port being down), you can hide the
route so as to restore it later.
Holddown
Holddown is a route redistribution policy adopted by
some distance-vector (D-V) routing protocols such as
RIP. Through Holddown, a routing protocol can avoid the
flooding of error routes and deliver route unreachable
messages accurately. It 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 the interior gateway protocol
(IGP).
NoAdvise
NoAdvise routes are nor released when the routing protocol ad
NotInstall
Generally, the route with the highest preference in a
routing table is added to the core routing table and
released. Comparatively, noninstall routes cannot be
added to the core routing table, however, they may be
released.
Reject
Reject route do not distribute packets as other routes.
Instead, the packet that selects a reject route will be
dropped, and ICMP unreachable messages will be sent
to the source end of the packet. Reject routes are
generally used in network tests.
State
Retain
When the routes in the core routing table are removed,
the routes with the retain tag will not be removed. You can
tag some static routes as retain routes so that they can
continue to exist in the core routing table.