Zyxel XS3700-24 Справочник командного интерфейса онлайн [63/371] 154131

Zyxel XS3700-24 Справочник командного интерфейса онлайн [63/371] 154131
Chapter 14 Data Center Bridging Commands
Ethernet Switch CLI Reference Guide
63
This is an example showing how many pause frames of certain priorities were temporarily
stopped (transmitted or received) on port 1.
14.2.3 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.
14.2.3.1 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.
sysname# show priority-flow-control statistics interface port-channel 1
Port Number: 1
PFC Tx
Priority 0: 0
Priority 1: 0
Priority 2: 0
Priority 3: 0
Priority 4: 0
Priority 5: 0
Priority 6: 0
Priority 7: 0
PFC Rx
Priority 0: 0
Priority 1: 0
Priority 2: 0
Priority 3: 0
Priority 4: 0
Priority 5: 0
Priority 6: 0
Priority 7: 0
sysname#

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