User manual

Chapter 4 - Layer 3 Command Set - IP Networking OSPFv2 (Dynamic Routing Protocol Module)
Alvarion BreezeNET B130/B300 GigE 149 Operational User Manual
In some cases there is a necessity to advertise internal links automatically for the
selected network interface. It becomes important when IP-addresses of this
interface (aliases) are created and deleted automatically, for example, when CPEs
are connecting to the BS via radio. To implement this, use the command in
config-router mode:
auto-interface IFNAME area (A.B.C.D|<0-4294967295>)
In the command an area ID is specified to which networks (destinations) will be
deferred. To cancel an automatic links advertisement for this interface, use the
command in config-router mode:
no auto-interface IFNAME
To announce external links use the following command in config-router mode:
redistribute (kernel|connected|static) [metric <0-16777214>]
[metric-type (1|2)] [route-map WORD]
To define criteria according to which a router will advertise the link, use the
command in config-router mode:
distribute-list WORD out (kernel|connected|static)
If this filter is not defined the router will advertise all links of the specified type of
a system table, if they are not dejected by route-map configured in redistribute
command parameters.
All links of this type are advertised as external type links with metric type 1 or 2
(External Type1|2). Information about external links is spread all over OSPF
domain (not only in the area). Stub areas are an exception to which the
information about external links is advertised as default gateway through the area
border router (ABR) of the area. Two types of metric differ in a way that metric
type 1 is a metric which is "commensurable" with inner OSPF links. When
calculating a metric to the external destination, the full path metric is calculated
as a sum of a path metric of a router which had advertised this link plus the link
metric. Thus, a route with the least summary metric will be selected. If external
link is advertised with metric type 2 the path is selected which lies through the
router which advertised this link with the least metric despite of the fact that
internal path to this router is longer (with more cost). However, if two routers
advertised an external link and with metric type 2 the preference is given to the
path which lies through the router with a shorter internal path. If two different
routers advertised two links to the same external destination but with different
metric type, metric type 1 is preferred.
WORD - access list identifier to which destination of system routing table should
respond.