Service SAP QoS Policy Command Reference
248 Quality of Service Guide
The reclassification actions from a dscp reclassification rule may be overridden by an IP flow match
event.
The fc keyword is optional. When specified, the egress classification rule will overwrite the forwarding
class derived from ingress. The new forwarding class is used for egress remarking and queue mapping
decisions. If an ip-criteria match occurs after the DSCP match, the new forwarding class may be
overridden by the higher priority match actions. If the higher priority match actions do not specify a
new fc, the fc from the dscp match will be used.
The profile keyword is optional. When specified, the egress classification rule will overwrite the
profile of the packet derived from ingress. The new profile value is used for egress remarking and
queue congestion behavior. If an ip-criteria match occurs after the DSCP match, the new profile may
be overridden by the higher priority match actions. If the higher priority match actions do not specify
a new profile, the profile from the DSCP match will be used.
The hsmda-counter-override keyword is optional. When specified, and the egress SAP is created on
an HSMDA, the egress classification rule will override the default queue accounting function for the
packet. By default, the HSMDA uses each queues default queue counters for packets mapped to the
queue. The hsmda-counter-override keyword is used to map the packet to an explicit exception
counter. One of eight counters may be used. When the packet is mapped to an exception counter, the
packet will not increment the queues discard or forwarding counters, instead the exception discard and
forwarding counters will be used.
The DSCP-based counter override decision may be overwritten by an ip-criteria reclassification rule
match if the higher priority classification rule has an hsmda-counter-override action defined.
The no form of the command removes the specified the dscp-names from the reclassification rule in
the SAP egress QoS policy. As dscp-names are removed, the system repacks the lists of dscp-names
with the same parameters (up to 8 per list). As the no command does not have any additional
parameters, it is possible to remove multiple dscp-names from multiple DSCP statements having
different parameters with one command. If a dscp-name specified in a no command does not exist in
any DSCP statement then the command is aborted at that point with an error message displayed. Any
dscp-names in the list before the failed entry will be processed as normal but the processing will stop
at the failed entry so that the remainder of the list is not processed.
Parameters dscp-name: — The dscp-name parameter is required when defining a DSCP reclassification rule.
The specified name must exist as a dscp-name. A maximum of 8 dscp-names can be specified
in a single statement. SR OS software provides names for the well-known code points, these
can be shown using the command below:
A:PE# show qos dscp-table
============================================================
DSCP Mapping
============================================================
DSCP Name DSCP Value TOS (bin) TOS (hex)
------------------------------------------------------------
be 0 0000 0000 00
cp1 1 0000 0100 04
cp2 2 0000 1000 08
cp3 3 0000 1100 0C
cp4 4 0001 0000 10
cp5 5 0001 0100 14
cp6 6 0001 1000 18
To Next Page
Loading...
