Cisco NCS 5500 Series

if destination in (10.10.0.0/16) and as-path originates-from '222' then
set local-pref 111
set community (333:222, 333:333) additive
elseif destination in (10.10.0.0/16) then /*Only Policy Child A is pass */
set local-pref 111
set community (333:444) additive /*From else block */
elseif as-path originates-from '222' then /*Only Policy Child B is pass */
set community (333:222, 333:444) additive /*From else block */
else
set community (333:444) additive /*From else block */
endif
end-policy
Apply Conditions can be used with parameters and are supported on all attach points and on all clients.
Hierarchical Apply Conditions can be used without any constraints on a cascaded level.
Existing route policy semantics can be expanded to include this Apply Condition:
Route-policy policy_name
If apply policyA and apply policyB then
Set med 100
Else if not apply policyD then
Set med 200
Else
Set med 300
Endif
End-policy
Behavior of pass/drop/done RPL Statements for Simple Hierarchical Policies
This table describes the behavior of pass/drop/done RPL statements, with a possible sequence for executing
the done statement for Simple Hierarchical Policies.
BehaviorPossible done statement execution
sequence
Route-policies with simple
hierarchical policies
Marks the prefix as "acceptable"
and continues with execution of
continue_list statements.
pass
Continue_list
pass
Rejects the route immediately on
hitting the drop statement and stops
policy execution.
Stmts_list
drop
drop
Accepts the route immediately on
hitting the done statement and stops
policy execution.
Stmts_list
done
done
Exits immediately at the done
statement with "accept route".
pass
Statement_list
done
pass followed by done
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
187
Implementing Routing Policy
Behavior of pass/drop/done RPL Statements for Simple Hierarchical Policies