Avaya Media Gateway G250, Руководство администратора

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Configuring the router
496 Administration for the Avaya G250 and Avaya G350 Media Gateways
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Delete entries from the routing table
Note:
Note:
To change an entry in the routing table, delete the entry and then add it as a new
entry.
The routes in the routing table are static routes. They are never timed-out, and can only be
removed manually. If you delete the interface, all static routes on the interface are also deleted.
A static route becomes inactive whenever the underlying Layer 2 interface is down, except for
permanent static routes. You can disable the interface manually using the
ip admin-state
down
command. For more information, see Permanent static route on page 498. When the
underlying Layer 2 interface becomes active, the static route enters the routing table again.
You can monitor the status of non-permanent static routes by applying object tracking to the
route. Thus, if the track state is changed to down then the static route state is changed to
inactive, and if the track state is changed to up then the static route state is changed to active.
For more information on object tracking, see
Object tracking on page 319.
Static routes can be advertised by routing protocols, such as RIP and OSPF. For more
information, see
Route redistribution on page 541. Static routes also support load-balancing
similar to OSPF.
Configuring next hops
Static routes can be configured with the following as next hops:
●
Via-interface route . Specifies a Serial interface as the next hop, without a specific next
hop IP address. See Via-interface static route on page 497.
●
Next-hop IP address . Specifies the IP address of a router as a next hop. The next hop
router must belong to one of the directly attached networks for which the Avaya
G250/G350 Media Gateway has an IP interface.
Static route types
Two kinds of static routes can be configured:
●
High Preference static routes . Preferred to routes learned from any routing protocol
●
Low Preference static routes . Used temporarily until the route is learned from a routing
protocol
By default, a static route has low preference.
Configuring multiple next hops
You can configure up to three next hops for each static route in one of the following manners:
●
Enter all of the next hops using a single
ip route
command. To add a new next hop to an
existing static route, enter the new next hop individually, as in the following option.
●
Enter each next hop individually with its own
ip route
command