Nokia Network Voyager, Справочное руководство, Страница: 399 / 700

Voyager Reference Guide 401
Configuring Access Control Lists (ACL)
Traffic Management Description
The traffic management software allows packet streams to be filtered, shaped,
or prioritized. The prioritization mechanisms conform to RFC 2598, the
Expedited Forwarding specification of the IETF DiffServ Working Group.
Traffic is separated into discrete streams, or classified, through an Access
Control List (ACL). Traffic is metered to conform to throughput goals with an
Aggregation Class (AGC). The combination of these control blocks form the
basis of the filtering, shaping, and prioritization tools. A queue class is used to
implement an output scheduling discipline to prioritize traffic.
Logically, the ACLs and the AGCs are placed inline to the forwarding path.
You can configure ACLs and AGCs to process all incoming traffic from one
or more interfaces, or to process all outgoing traffic from one or more
interfaces. IPSO supports ACLs for both IPv4 and IPv6 traffic.
Packet Filtering Description
Traffic that is classified can be filtered immediately. The actions for filtering
are:
!
Accept—The accept action forwards the traffic.
! Drop—The drop action drops the traffic without any notification.
!
Reject—The reject action drops the traffic and sends an ICMP error
message to the source.
For information on how to configure a packet filter, see “Description of
Access Control List Rules” .