summary-address

To creates aggregate addresses for OSPF and help in reducing the size of the routing table, use the command summary-address in OSPF Router Configuration Mode. The no form of the command deletes the External Summary Address.

summary-address

summary-address { <Network> } { <Mask> } { <AreaId> }
{ [{allowAll } { | denyAll } { | advertise } { | not-advertise}] }
{ [Translation } { {disable } { | enable}] }
{ [tag } { <tag-value>] }

no summary-address

no summary-address { <Network> } { <Mask> } { <AreaId> } { [not-advertise] } { [tag } { <tag-value>] }

Parameters

Parameter Type Description
<Network>   Enter an IP address to configure the IP address of the network indicated by the range.
<Mask>   Enter the subnet mask that pertains to the range. The mask indicates the range of addresses being described by the particular route. For example, a summary-LSA for the destination 128.185.0.0 with a mask of 0xffff0000 actually is describing a single route to the collection of destinations 128.185.0.0 - 128.185.255.255.
<AreaId>   Enter to configure the area associated with the OSPF address range and the identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.
Note:

The Area Id should be of backbone area or NSSA area.
allowAll   Enter to configure allowAll option and set associated area ID as 0.0.0.0 which generates the aggregated Type-5 for the specified range. In addition aggregated Type-7 are generated in all attached NSSA, for the specified range This parameter is valid only for area ID 0.0.0.0.
denyAll   Enter to configure denyAll in which neither Type-5 nor Type-7 will be generated for the specified range. This parameter is valid only for area ID 0.0.0.0.
advertise   Enter to set the address range status to advertise and generate a Type 3 summary link-state advertisement (LSA). When associated area Id is 0.0.0.0, aggregated Type-5 are generated. For associated other than 0.0.0.0, aggregated Type-7 is generated in NSSA x.x.x.x.
not-advertise   Enter to set the address range status to Not Advertise. The Type 3 summary LSA is suppressed, and the component networks remain hidden from other networks When associated area Id is 0.0.0.0, Type-5 is not generated for the specified range, while aggregated Type-7 are generated in all attached NSSA. For associated area Id x.x.x.x which is other than 0.0.0.0, Type-7 are not generated in NSSA x.x.x.x for the specified range.
Translation   Enter to configure how an NSSA Border router is performing NSSA translation of Type-7 to Type-5 LSAs.
disable   Enter to clear P-Bit in the generated default LAS, when NSSA ASBR is set to disabled.
enable   Enter to set P-Bit in the generated Type-7 default LSA, when NSSA ASBR is set to enabled.
tag   Enter to configure the tag option for OSPF.
<tag-value> Integer Enter a tag value.

Mode

OSPF Router Configuration Mode

Default

Examples

iS5Comm(config)# router ospf

iS5Comm(config-router)# summary-address 10.0.0.6 255.0.0.0 10.0.0.0 Translation enabled

Parent topic: OSPF