ZyXEL Communications XS3800-28 Cli Reference Manual page 80

This is an example showing how many pause frames of certain priorities were temporarily stopped
(transmitted or received) on port 1.
sysname# show priority-flow-control statistics interface port-channel 1
Port Number: 1
PFC Tx
PFC Rx
sysname#
20.2.3 ETS
An IEEE 802.1p priority is assigned to a traffic class with guaranteed minimum bandwidth. A traffic class
can use SP (Strict Priority) or WFQ (Weighted Fair Queue) queuing method. Available link bandwidth is
reserved first for SP traffic. The guaranteed minimum bandwidth for non-SP traffic (WFQ) is its weight
value by remaining available bandwidth. If a non-strict-priority-traffic-class does not consume its
allocated bandwidth, other non-strict-priority-traffic-classes can share the unused bandwidth according
to the weight ratio.
20.2.3.1 Notes on ETS
• Priority 0 does not mean the highest or lowest priority. Priority level of importance is mapped to a
queue level (with queue level 0, the lowest importance).
• You don't automatically configure ETS using DCBX negotiation. ETS is configured manually on each
Switch.
• All priorities are mapped to traffic class ID 0 by default.
• The default traffic class (named Default) has ID 0, and is an SP traffic-class. It cannot be modified or
deleted.
• You can create up to 100 traffic class profiles, with ID from 1 to 100.
• The weight range of WFQ traffic-class can be from 1 to 100.
• Bandwidth can also be prioritized depending on whether traffic is unicast traffic or non-unicast
(broadcast, multicast, DLF) traffic. For example, 100:50 means twice as much unicast traffic to non-
unicast traffic is allowed when there is network congestion. The weight ranges of unicast and non-
unicast traffic can be from 1 to 127.
Chapter 20 Data Center Bridging Commands
Priority 0: 0
Priority 1: 0
Priority 2: 0
Priority 3: 0
Priority 4: 0
Priority 5: 0
Priority 6: 0
Priority 7: 0
Priority 0: 0
Priority 1: 0
Priority 2: 0
Priority 3: 0
Priority 4: 0
Priority 5: 0
Priority 6: 0
Priority 7: 0
Ethernet Switch CLI Reference Guide
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