Behavior Of Pass/Drop/Done Rpl Statements For Simple Hierarchical Policies; Behavior Of Pass/Drop/Done Rpl Statements For Hierarchical Policy; Conditions - Cisco ASR 9000 Series Routing Configuration Manual

Implementing Routing Policy
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.
Route-policies with simple
hierarchical policies
pass
drop
done
pass followed by done
drop followed by done
Behavior of pass/drop/done RPL Statements for Hierarchical Policy Conditions
This section describes the behavior of pass/drop/done RPL statements, with a possible sequence for executing
the done statement for Hierarchical Policy Conditions.
Possible done statement execution
sequence
pass
Continue_list
Stmts_list
drop
Stmts_list
done
pass
Statement_list
done
drop
Statement list
done
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
Hierarchical Policy Conditions
Behavior
Marks the prefix as "acceptable"
and continues with execution of
continue_list statements.
Rejects the route immediately on
hitting the drop statement and
stops policy execution.
Accepts the route immediately on
hitting the done statement and
stops policy execution.
Exits immediately at the done
statement with "accept route".
This is an invalid scenario at
execution point of time. Policy
terminates execution at the drop
statement itself, without going
through the statement list or the
done statement; the prefix will be
rejected or dropped.
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