Hirschmann HiSecOS EAGLE30 - OSPF Ranges

Routing > OSPF > Ranges
Routing
328
RM GUI HiSecOS EAGLE20/30
Release 3.0 09/2015
Routing > OSPF > Ranges
8.16 OSPF Ranges
In large areas, OSPF messages flooded across the network reduce available
bandwidth and increase the size of the routing table. A large routing table
increases the amount of CPU processing that the router requires to enter the
information into the routing table. A large routing table also reduces available
memory. To decrease the number of OSPF messages flooded across the
network, OSPF allows you to create several smaller subnets within a large
area.
In order to summarize routing information into and out of a subnetwork, the
Area Boundary Router (ABR) specifies the subnetwork as a single address
range. The ABR advertises each address range as a single route to the
external area. The IP address that the ABR advertises for the subnetwork is
an address and mask pair. Unadvertised ranges allow you to hide the
existence of subnetworks from other areas.
The router specifies cost of the advertised route as the greater cost in the set
component subnets.
 To enter an address range into the table, click the "Create" button.
 Table
Parameters Meaning
Area ID Displays the area ID of the address range.
Active Specifies the status of the aggregate area.
Possible values:
 marked
The range is active.
 unmarked (default setting)
The range is inactive.
LSDB Type Displays the LSDB type to which this address range belongs.
Possible values:
 summaryLink
The area range aggregates type 5 route information.
Network Displays the IP address of the network or subnetwork of the range.
Possible values:
 Valid IPv4 address