Nortel 2000, Using Manual

Page: 279 / 405

Chapter 4 Policy-enabled networks 279
Using the Business Policy Switch 2000 Version 1.2
Packet classifiers or filters
Packet classifiers, or filters, select packets according to a particular content in the
packet header such as the source address, destination address, source port number,
destination port number, and others. Packet classifiers identify flows for more
processing.
You can create the following two types of filter groups:
• Layer 2 filters
• IP filters
A filter group is an ordered list of filters. Filters can be added to or deleted from an
existing group.
A filter or filter group is associated through a policy with interface groups. Packets
received from any port that is in an interface group are classified with the same
filters.
Non-real time, mission
critical, non-interactive Bronze For example, E-mail, FTP,
SNMP. Lower-priority scheduling
providing guaranteed minimum
provisioned bandwidth.
Competes for additional
bandwidth.
Non-real time,
non-mission critical Standard Bulk transfer (such as large
FTP transfers, after-hours
tape backup). Best effort delivery. Uses
remaining available bandwidth.
Note:
Layer 2 and IP filters cannot coexist in the same group.
Table 56 Service classes (continued)
Traffic category Service class Application type Required treatment