Is-Is Policy Attach Points; Redistribute - Cisco ASR 9000 Series Configuration Manual

Attach Points
Table 8: OSPFv3 Attributes and Operators
Attach Point
default-information
originate

redistribute

IS-IS Policy Attach Points

This section describes each of the IS-IS policy attach points and provides a summary of the IS-IS attributes
and operators.
Redistribute
The redistribute attach point within IS-IS allows routes from other protocols to be readvertised by IS-IS. The
policy is a set of control structures for selecting the types of routes that a user wants to redistribute into IS-IS.
The policy can also control which IS-IS level the routes are injected into and at what metric values.
The following describes an example. Here, routes from IS-IS instance 1 are redistributed into IS-IS instance
instance_10 using the policy ISIS-redist. This policy sets the level to level-1-2 for all redistributed routes.
IS-IS routes with a tag of 10 have their metric set to 100, and IS-IS routes with a tag of 20 have their IS-IS
metric set to 200. Any IS-IS routes not carrying a tag of either 10 or 20 are not be redistributed into the IS-IS
database.
route-policy ISIS-redist
set level level-1-2
if tag eq 10 then
set isis-metric 100
elseif tag eq 20 then
set isis-metric 200
else
drop
endif
end-policy
router isis instance_10
address-family ipv4 unicast
redistribute isis 1 policy ISIS-redist
.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
522
Attribute Match
ospf-metric —
metric-type —
tag —
rib-has-route in
destination in
ospf-metric —
metric-type —
route-type is
tag is, eq, ge, le
Implementing Routing Policy
Set
set
set
set
—
—
set
set
—
—
OL-30423-03