Cisco NCS 5500 Series

to 200. Any IS-IS routes not carrying a tag of either 10 or 20 are not be redistributed into the OSPF link-state
database.
route-policy OSPF-redist
set metric-type type-2
if tag eq 10 then
set ospf cost 100
elseif tag eq 20 then
set ospf cost 200
else
drop
endif
end-policy
router ospf 1
redistribute isis instance_10 policy OSPF-redist
.
.
.
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
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
178
Implementing Routing Policy
Area-in