Qos Lists; Policy-Based Routing; Managing Policy Lists - Avaya G350 Administration

Configuring policy
Policy overview
•
Actions (composite operation table) — a table that describes actions to be performed when a
packet matches a rule. The table includes pre-defined actions such as permit and deny. You can
configure more complex rules. See

QoS lists

You can use QoS lists to change the DSCP and Ethernet IEEE 802.1p CoS fields in packets. When a
packet matches a rule on the QoS list, the G350 sets one or both of the QoS fields in the packet. The
following table shows these QoS fields:
Layer
2
3
Each QoS list also includes a DSCP table. The DSCP table enables you to set one or both of the QoS
fields in a packet based on the previous value of the DSCP field in the packet.
QoS lists have the following parts:
•
Rule list — a list of filtering rules and actions for the G350 to take when a packet matches the
rule. Match actions on this list are pointers to the composite operation table.
•
Actions (composite operation table) — a table that describes actions to be performed when a
packet matches a rule. The table includes pre-defined actions such as permit and deny. You can
configure more complex rules. See
•
DSCP map — a table that contains DSCP code points and match action pairs. Match actions are
pointers to the composite operation table.

Policy-based routing

You can use policy-based routing to determine the routing path a packet takes based on the type of packet
or the packet's source or destination IP addresses or DSCP field. This enables you to route different types
of traffic over different routes or interfaces. For example, you use policy-based routing to route voice
traffic over a WAN interface and data traffic over the Internet. Policy-based routing is implemented by
means of policy-based routing (PBR) lists. PBR lists are similar in many respects to access control lists
and QoS lists. However, since there are also some key differences, policy-based routing is explained in a
separate chapter. Refer to

Managing policy lists

You can manage policy lists on the Avaya G350 Media Gateway with CLI commands. You can also
manage policy lists throughout your network with Avaya QoS Manager. Avaya QoS Manager is part of
Avaya Integrated Management.
on the Avaya G350 Media Gateway:
160
Composite operations
QoS field Allowed values
802.1p 0–7
DSCP 0–63
Composite operations
Configuring policy-based routing
Figure 12, Policy lists,
Administration of the Avaya G350 Media Gateway
on page 170.
on page 170.
on page 177.
on page 161 illustrates the operation of policy lists
June 2004