Allied Telesis AT-S83 - Manual (Page 351)

AT-S83 Management Software Command Line Interface User’s Guide
351
SUMMARY-ADDRESS
Syntax
summary address A.B.C.D/M (not-advertise)
(tag <0-4294967295>)
no summary address
Parameters
A.B.C.D/M Specifies the range of addresses given as IPv4
starting address and a mask indicating the range.
not-advertise Suppresses external routes. This is an optional
parameter.
tag The default tag value is 0. Enter a value between 0
and 4,294,967,295. This is an optional parameter.
Description
Use the SUMMARY-ADDRESS command to summarize or suppress
external routes with the specified address range.
An address range is a pairing of an address and a mask that is almost the
same as an IP network number. For example, if the specified address
range is 192.168.0.0/255.255.240.0, it matches: 192.168.1.0/24,
192.168.4.0/22,192.168.8.128/25 and so on.
Redistributing routes from other protocols into OSPF requires the router to
advertise each route individually in an external LSA. Use the SUMMARY-
ADDRESS command to advertise one summary route for all of the
redistributed routes covered by a specified network address and mask.
This helps decrease the size of the OSPF link state database.
Command Mode
Router mode
Example
The following example uses the SUMMARY-ADDRESS command to
aggregate external LSAs that match the network 172.16.0.0/24 and assign
a tag value of 3:
switch# configure terminal
switch(config)# router ospf 100