Cisco ASR 9000 Series Routing Configuration Guide

Area-in
The area-in attach point within OSPF allows you to filter inbound OSPF type-3 summary link-state
advertisements (LSAs). The attach point provides prefix-based matching and hence increased control for
filtering type-3 summary LSAs.
The following example shows how to configure the prefix for OSPF summary LSAs. If the prefix matches
any of 10 .105.3.0/24, 10 .105.7.0/24, 10 .105.13.0/24, it is accepted. If the prefix matches any of 10 .106.3.0/24,
10 .106.7.0/24, 10 .106.13.0/24, it is dropped.
route-policy OSPF-area-in
if destination in (10
.105.3.0/24, 10
.105.7.0/24, 10
.105.13.0/24) then
drop
endif
if destination in (10
.106.3.0/24, 10
.106.7.0/24, 10
.106.13.0/24) then
pass
endif
end-policy
router ospf 1
area 1
route-policy OSPF-area-in in
Area-out
The area-out attach point within OSPF allows you to filter outbound OSPF type-3 summary LSAs. The attach
point provides prefix-based matching and, hence, increased control for filtering type-3 summary LSAs.
The following example shows how to configure the prefix for OSPF summary LSAs. If the prefix matches
any of 10 .105.3.0/24, 10 .105.7.0/24, 10 .105.13.0/24, it is announced. If the prefix matches any of
10.105.3.0/24, 10 .105.7.0/24, 10 .105.13.0/24, it is dropped and not announced.
route-policy OSPF-area-out
if destination in (10
.105.3.0/24, 10
.105.7.0/24, 10
.105.13.0/24) then
drop
endif
if destination in (10
.105.3.0/24, 10
.105.7.0/24, 10
.105.13.0/24) then
pass
endif
end-policy
router ospf 1
area 1
route-policy OSPF-area-out out
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
594
Implementing Routing Policy
Attach Points

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model