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Chapter 4 Operational Concepts and Configuration Examples
50 Avaya X330WAN User’s Guide
For example: The Policy rule ip access-list 100 1 fwd3 tcp any any points to
entry number 3 in the Composite Operations Table based on the action name -
fwd3.
The resulting action is the combination of all the relevant operations in this entry,
meaning the packet is forwarded, no traps are issued, the packet’s priority is
changed to 3, and ‘no’ DSCP modification occurs.
Since the predefined entries in the Composite Operations Table include all of the
available priority modification and Access Control actions, the only time you need
to add entries to this table is for DSCP coloring.
For example: To set the DSCP value to 45 for all of the UDP traffic:
1 Create a new entry in the Composite Operations Table with the name ‘cngdscp’
(or any other name) by entering:
ip composite-op name 100 15 cngdscp
Where 100 is the Policy list number, and 15 is the number of the created entry in
the Composite Operations Table.
2 Set the DSCP value to 45 by entering:
ip composite-op dscp 100 15 45
Where 100 is the Policy list number, and 15 is the number of the created entry in
the Composite Operations Table.
3 Create the following Policy rule:
ip access-list 100 1 cngdscp udp any any
Since the action part of the Policy rule has a value of cngdscp, this value is
searched for in the Composite Operations Table, and the associated actions in
the Composite Operations Table are applied to the packet. In this case, the
DSCP is changed to 45.
4 Activate the new Access List created on a required interface using the
ip
access-group
command in the interface’s context.
For example: entering
ip access-group 100 in within the Serial 1 interface
context activates Access List 100 on the ingress of the Serial 1 interface.
In a similar manner, the DSCP-802.1p mapping table can point to an entry in the
Composite Operations Table, causing the action of a particular DSCP value not to be
a 802.1p Priority, but rather the value of the referenced entry in the Composite
Operations Table.
The following Policy commands are performed outside a context:
• [no] ip access-list
Creates/deletes a policy statement.
• ip access-default-action
Sets the default action for a specific Policy list.
• ip access-list-name
Sets the name for the Policy list.
• ip access-list-owner
Sets the owner for the Policy list.
• ip access-list-cookie
Sets the Policy list cookie.
• ip access-list-copy
Copies a Policy list.