Nortel Networks 2000 Manual De Usuario
Chapter 4 Policy-enabled networks 281
Using the Business Policy Switch 2000 Version 1.2
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Change IEEE 802.1p and drop precedence of matching packets.
If a layer 2 filter is installed on a trusted port, then it cannot change the DSCP of
the matching IP traffic or the IEEE 802.1p for all types of traffic. If a layer 2 filter
is installed on an untrusted port, then the associated action must change the DSCP
(if matching IP traffic), IEEE 802.1p, and drop precedence of all matching traffic.
If a layer 2 filter is installed on an unrestricted port, you can specify an action to
change or ignore either the DSCP (if matching IP traffic), IEEE 802.1p, and drop
precedence of the matching traffic.
the matching IP traffic or the IEEE 802.1p for all types of traffic. If a layer 2 filter
is installed on an untrusted port, then the associated action must change the DSCP
(if matching IP traffic), IEEE 802.1p, and drop precedence of all matching traffic.
If a layer 2 filter is installed on an unrestricted port, you can specify an action to
change or ignore either the DSCP (if matching IP traffic), IEEE 802.1p, and drop
precedence of the matching traffic.
for more information on layer 2 traffic, either IP or non-IP, and
trusted, untrusted, or unrestricted ports.
IP filters
IP filters are used to classify IP traffic based on the following criteria:
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Layer 3 information, including IP source and subnet addresses, IP destination
and subnet addresses, DSCP, and IP protocols such as TCP/UDP
and subnet addresses, DSCP, and IP protocols such as TCP/UDP
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Layer 4 information, including TCP/UDP port numbers (port ranges are not
supported by layer 3 filters)
supported by layer 3 filters)
IP filters have the same actions as layer 2 filters. If an IP filter is installed on a
trusted port, then it cannot change the DSCP of the matching IP traffic or 802.1p
user priority. If an IP filter is installed on an untrusted port, then it must change the
DSCP, IEEE 802.1p, and drop precedence of the matching IP traffic. If an IP filter
is installed on an unrestricted port, you configure that interface to change or not
either the DSCP, IEEE 802.1p, and drop precedence of the matching IP traffic, as
you want.
trusted port, then it cannot change the DSCP of the matching IP traffic or 802.1p
user priority. If an IP filter is installed on an untrusted port, then it must change the
DSCP, IEEE 802.1p, and drop precedence of the matching IP traffic. If an IP filter
is installed on an unrestricted port, you configure that interface to change or not
either the DSCP, IEEE 802.1p, and drop precedence of the matching IP traffic, as
you want.
for more information on layer 2 traffic, either IP or non-IP, and
trusted, untrusted, or unrestricted ports.
Changing IEEE 802.1p priority and drop precedence
You can change the IEEE 802.1p priority and drop precedence for IP traffic by
using either IP or layer 2 filters. To change IEEE 802.1p priority and drop
precedence for non-IP traffic, you must use layer 2 filters.
using either IP or layer 2 filters. To change IEEE 802.1p priority and drop
precedence for non-IP traffic, you must use layer 2 filters.