Cisco ASR 900 Series Release Notes page 21

Chapter
Support for Weighted Random Early Detection—This feature introduces support for Weighted
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Random Early Detection (WRED) for congestion avoidance on egress interfaces. For details about
this feature, see:
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Y.1731 Performance Monitoring—Y.1731-PM provides a standards-based Ethernet performance
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monitoring function, which encompasses measurement of Ethernet frame delay, frame delay
variation, frame loss, and frame throughput as outlined in the ITU-T Y-1731 specification and
interpreted by the Metro Ethernet Forum (MEF) standards group. For details about this feature, see:
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OL-26630-12
http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conavd/configuration/xe-3s/qos-conavd-diffs
erv-wred.html
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/config_wred.html
http://www.cisco.com/en/US/products/hw/routers/ps133/products_configuration_guide_book09
186a00805b9497.html
http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR
903-Chassis-SW-36.html
http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-y1731-perfmon.ht
ml
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_y1731-perfmon.html
New Software Features in Cisco IOS XE Release 3.6S
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
7