Juniper ACX1000 Configuration Manual page 1010

ACX Series Universal Access Router Configuration Guide
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NOTE: For a specified interface, you can configure both a multifield classifier
and a BA classifier without conflicts. Because the classifiers are applied in
sequential order if they are both either protocol specific or protocol
independent, the BA classifier followed by the multifield classifier, any BA
classification result is overridden by a multifield classifier if they conflict.
In the case that a protocol-specific BA classifier and a protocol-independent
firewall filter are both configured together, the protocol-independent filter
is processed before the protocol-specific BA classifier, regardless or protocol
family.
firewall family any filter
processed before protocol-specific BA classifiers.
Fixed classification is protocol independent as well, hence, it is executed
before any firewall filter.
For more information about multifield classifiers, see
Service Levels to Packets Based on Multiple Packet Header Fields" on page
For more information about protocol-independent filters, see
Configuring Firewall Filters" on page
classification, see Applying Forwarding Classes to Interfaces.
If you do nothing to configure or assign classifiers, Junos OS automatically assigns an
implicit default IP precedence classifier to all logical interfaces that maps IP precedence
code points to
best-effort
and queue 3 on routing devices, respectively). The default Junos OS CoS policy reserves
5 percent of available bandwidth for
traffic. Junos OS provides a range of default BA classifiers that you can apply to logical
interfaces and that map various CoS values to
expedited-forwarding forwarding classes as well as to the
forwarding classes. You can also define custom BA classifiers that map any CoS value
to any classifier you define.
NOTE: The default Junos OS CoS policy, 95 percent of the bandwidth for
queue 0 and 5 percent for queue 3 on routing devices (see Default Schedulers
Overview), is in effect regardless of any custom BA classifier or forwarding
class definitions, until you configure a custom scheduler (see Configuring
Schedulers).
If you enable the MPLS protocol family on a logical interface, a default MPLS EXP classifier
is automatically applied to that logical interface. This default EXP classifier (see Default
MPLS EXP Classifier) maps the eight possible EXP code point values into a combination
of the four default forwarding classes and loss priority values to be directly compatible
with the default EXP rewrite rule (see Rewriting MPLS and IPv4 Packet Headers).
Other default classifiers (such as those for IEEE 802.1p bits and DSCP) require that you
explicitly associate a default classification table with a logical interface. When you
is protocol independent and will be always
1044. For more information about fixed
and forwarding classes (mapped to queue 0
network-control
network-control
assured-forwarding
"Overview of Assigning
"Guidelines for
traffic and 95 percent for best-effort
and
best-effort and network-control
Copyright © 2017, Juniper Networks, Inc.
891.