Reference Guide

Total Rx PFC Frames: 0
Total Tx PFC frames: 587236
Cos Rx Tx
-----------------------
0 0 0
1 0 0
2 0 0
3 0 587236
4 0 0
5 0 0
6 0 0
7 0 0
Supported Releases 10.3.0E or later
Enhanced transmission selection
Enhanced transmission selection (ETS) provides customized bandwidth allocation to 802.1p classes of trac. Assign dierent amounts of
bandwidth to trac classes (Ethernet, FCoE, or iSCSI) that require dierent bandwidth, latency, and best-eort treatment during network
congestion.
ETS divides trac into dierent priority groups using their 802.1p priority value. To ensure that each trac class is correctly prioritized and
receives required bandwidth, congure bandwidth and queue scheduling for each priority group. You can allocate more bandwidth to a
priority group to prioritize low-latency storage and server-cluster trac. Allocate less bandwidth to a dierent priority group to rate-limit
best-eort LAN trac.
ETS conguration notes
• ETS is supported on L2 802.1p priority (dot1p 0 to 7) and L3 DSCP (0 to 63) trac. FCoE trac uses dot1p priority 3 — iSCSI storage
trac uses dot1p priority 4.
• Apply these maps and policies on interfaces:
• Trust maps — OS10 interfaces do not honor the L2 and L3 priority elds in ingress trac by default. Create a trust map to honor
dot1p and DSCP classes of lossless trac. A trust map does not change ingress dot1p and DSCP values in egress ows. In a trust
map, assign a qos-group (trac class) to trusted dot1p/DSCP values. A qos-group number is used only internally to schedule
classes of ingress trac.
• QoS map — Create a QoS map to assign trusted dot1p and DSCP trac classes to lossless queues.
• Ingress trust policy — Congure a service policy to trust dot1p values in ingress trac.
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Converged data center services