3Com 7750 Series Chapter 3 OSPF Configuration Commands

3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 3 OSPF Configuration Commands
3-1
Chapter 3 OSPF Configuration Commands
 Note:
The words “router” covered in the following text represent routers in common sense
and Ethernet switches running a routing protocol. To improve readability, this will not
be mentioned again in this manual.
3.1 OSPF Configuration Commands
3.1.1 abr-summary
Syntax
abr-summary ip-address mask [ advertise | not-advertise ]
undo abr-summary ip-address mask
View
OSPF Area view
Parameter
ip-address: Network segment address.
mask: Network mask.
advertise: Specifies to advertise the aggregated route that match a specific IP
address and mask.
not-advertise: Specifies not to advertise the aggregated route that match a specific
IP address and mask.
Description
Use the abr-summary command to enable route aggregation on an area border
router (ABR).
Use the undo abr-summary command to disable route aggregation on an ABR.
By default, an ABR does not aggregate routes.
This command is applicable to ABRs only and is used for route aggregation in an area.
It allows the ABR to transmit an aggregated route to other areas.
Route aggregation means that routing information is processed by an ABR, which
transmits only one route to other areas for each network segment configured with