Modifying Rules; Pbr Rule Criteria; Next Hop Lists - Avaya G250 Administration Manual

Modifying rules

To modify a policy-based routing rule, you must enter the context of the rule and redefine the
rule criteria.
1. Enter the context of the PBR list to which the rule belongs.
2. Enter ip-rule followed by the number of the rule you want to modify. For example, to
create rule 1, enter ip-rule 1.
To view the rules that belong to a PBR list, enter the list's context and then enter show
ip-rule.

PBR rule criteria

The rule criteria for PBR rules are largely the same as the rule criteria for other policy list rules.
Refer to Policy lists rule criteria
explanations and examples of the commands used to set the criteria.
Unlike other policy lists, PBR lists do not use composite operations. Thus, there is no
composite-operation command in the context of a PBR rule. Instead, PBR lists use next
hop lists. For an explanation of next hop lists, see
Enter next-hop list, followed by the list number of a next hop list, to specify a next hop list
for the G250/G350 to apply to packets that match the rule. You can specify Destination Based
Routing instead of a next hop list, in which case the G250/G350 applies destination-based
routing to a packet when the packet matches the rule.
If the next hop list specified in the rule does not exist, the G250/G350 applies destination-based
routing to packets that match the rule.

Next hop lists

PBR rules include a next hop list. When the rule matches a packet, the G250/G350 routes the
packet according to the specified next hop list.
Each next hop list can include up to 20 entries. An entry in a next hop list can be either an IP
address or an interface. The G250/G350 attempts to route the packet to the first available
destination on the next hop list. If every destination on the list is unavailable, the G250/G350
routes the packet according to destination-based routing.
on page 646 for an explanation of the rule criteria, including
Next hop lists
Next hop lists
on page 671.
Issue 5 June 2008 671