User manual

Chapter 4 - Layer 3 Command Set - IP Networking ARIP
Alvarion BreezeNET B130/B300 GigE 130 Operational User Manual
default-information originate [always] [metric-type (1|2)]
[metric <0-16777214>] [route-map WORD]
metric-type (1|2) and metric <0-16777214> attributes define the same
parameters of the external link for redistribute command. They are also not
mandatory. This command also has one optional attribute - always. This attribute
makes a router to advertise its default gateway link even if the route is not in the
routing table.
To cancel advertising of an external link to default gateway us the command:
no default-information originate
The following command enables "split horizon" algorithm at the device's ip
interface in the config-if mode:
split-horizon [poisoned-reverse]
When the "split horizon" algorithm is enabled device doesn't announce routes
through an interface from which they were obtained, thus reducing the likelihood
of a local routing cycles.
If poisoned-reverse option is set device when removing the route still some time
left it in the routing table and include it in the standard distribution
announcement with special reference so that neighboring routers realize that the
route is no longer used. Metrics of a route with the value 16 is used as a metrics
for this.
"Split horizon" algorithm without poisoned-reverse option is enabled by default.
To cancel "split horizon" algorithm use command:
no split-horizon
4.5.6 Route Map (route-map)
For more flexible configuration of metric type and its value, one can use a
route-map. Route-map is a set of conditional records. Each record has its number
in the map, a condition of correspondence for the importing route of the record,
actions to be done with a resulting object in case of its correspondence, resulting
action (deny, permit) etc. Routes are listed in the route-map according to their
number in ascending order. If a route satisfies a record's condition:
 If a resulting action is deny, the route is denied, review of map's records is
aborted and a resulting object is cancelled (link is not advertised)