Quality of Service Guide QoS and QoS Policies
Edition: 01 3HE 11014 AAAC TQZZA 121
3.6.3 Access Egress Shaping for Hybrid Ports
Hybrid ports use a third-tier, dual-rate aggregate shaper to provide arbitration
between the bulk of access and network egress traffic flows. For details, see QoS for
Hybrid Ports on Gen-2 Hardware.
3.6.4 Access Egress for 4-Priority (Gen-3) Scheduling
The adapter cards and ports that support 4-priority (Gen-3) scheduling for access
egress traffic are listed in Table 13. See QoS for Gen-3 Adapter Cards and Platforms
for details.
3.6.5 Access Egress Marking/Re-Marking
At access egress, where the network-wide QoS boundary is reached, there may be
a requirement to mark or re-mark the CoS indicators to match customer
requirements. Dot1p and DSCP marking and re-marking is supported at Ethernet
access egress.
Similar to access ingress for Ethernet, DSCP marking or re-marking is supported for
untagged, single-tagged, or double-tagged Ethernet frames.
On Ipipe SAPs over an Ethernet VLAN, both dot1p and DSCP marking and
re-marking is supported at access egress. On Ipipe SAPs over PPP/MLPPP, DSCP
marking and re-marking is supported at access egress. DSCP re-marking is
supported for Ipipes using FR or cHDLC SAPS at the access egress.
Note: When dot1p re-marking is needed for a qinq egress SAP, it may be necessary to use
the qinq-mark-top-only command to indicate which qtag needs to have its dot1p bits
re-marked. The qinq-mark-top-only command is found under the config>service context.
Refer to the 7705 SAR Services Guide, 'VLL Services Command Reference”, for details.
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