Reference Guide
• The CEE/IEEE2.5 versions of ETS TLVs are supported. ETS congurations are received in a TLV from a peer.
Congure ETS
ETS provides trac prioritization for lossless storage, latency-sensitive, and best-eort data trac on the same link.
• Congure classes of dot1p and DSCP trac and assign them to lossless queues. Use the class-trust class map to honor ingress dot1p
and DSCP trac.
• Allocate guaranteed bandwidth to each lossless queue. An ETS queue can exceed the amount of allocated bandwidth if another queue
does not use its share.
ETS is disabled by default on all interfaces.
1 Congure trust maps of dot1p and DSCP values in CONFIGURATION mode. A trust map does not modify ingress values in output
ows. Assign a qos-group (trac class 0-7) to trusted dot1p/DSCP values in TRUST mode. A qos-group number is used only
internally to schedule classes of ingress trac. Enter multiple dot1p and dscp values in a hyphenated range or separated by
commas.
trust dot1p-map dot1p-map-name
qos-group {0-7} dot1p {0-7}
exit
trust dscp-map dscp-map-name
qos-group {0-7} dscp {0-63}
exit
2
Congure a QoS map with trusted trac-class (qos-group) to lossless-queue mapping in CONFIGURATION mode. Assign one or
more qos-groups (0-7) to a specied queue in QOS-MAP mode. Enter multiple
qos-group values in a hyphenated range or
separated by commas. Enter multiple queue qos-group entries, if necessary.
qos-map traffic-class queue-map-name
queue {0-7} qos-group {0-7}
exit
3 Apply the default trust map specifying that dot1p and dscp values are trusted in SYSTEM-QOS or INTERFACE mode.
trust-map {dot1p | dscp} default
4 Create a queuing class map for each ETS queue in CONFIGURATION mode. Enter match queue criteria in CLASS-MAP mode.
class—map type queuing class—map-name
match queue {0-7}
exit
5 Create a queuing policy map in CONFIGURATION mode. Enter POLICY-CLASS-MAP mode and congure the percentage of
bandwidth allocated to each trac class-queue mapping. The sum of all DWRR-allocated bandwidth across ETS queues must be
100% (not including the strict priority queue). Otherwise, QoS automatically adjusts bandwidth percentages so that ETS queues
always receive 100% bandwidth. The remaining non-ETS queues receive 1% bandwidth each.
policy—map type queuing policy—map-name
class class—map-name
bandwidth percent {1-100}
(Optional) To congure a queue as strict priority, use the priority command. Packets scheduled to a strict priority queue are
transmitted before packets in non-priority queues.
policy—map type queuing policy—map-name
class class—map-name
priority
6 Apply the trust maps for dot1p and DSCP values, and the trac class-queue mapping globally on the switch in SYSTEM-QOS mode
or on an interface or interface range in INTERFACE mode.
system qos
trust-map dot1p dot1p-map-name
trust-map dscp dscp-map-name
qos-map traffic-class queue-map-name
Or
interface {ethernet node/slot/port[:subport] | range ethernet node/slot/port[:subport]-node/
slot/port[:subport]}
Converged data center services
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