You can configure egress scheduling as either strict priority scheduling or weighted round-robin (WRR) scheduling. The 2950 with EI also supports policing and marking at ingress as well as queuing and scheduling at egress. The 2950 with the EI supports Layer 2 (L2)–Layer 4 (L4) classification at ingress with use of: What QoS features does the 2950 enhanced image (EI) support?Ī.
HOW TO NAME CISCO 2950 SWITCH SOFTWARE
In Cisco IOS Software Releases 12.1 and later, SI added these features:Ĭlassification on the basis of Cisco Discovery Protocol (CDP) from a Cisco IP phone In Cisco IOS Software Releases 12.0, SI only supports configuration on CoS priorities and WRR.
HOW TO NAME CISCO 2950 SWITCH CODE
You can configure the ingress port to trust either class of service (CoS) or differentiated services code point (DSCP), where the default port trust state is untrusted. The 2950 with SI supports ingress classification with use of port trust states in Cisco IOS Software Release 12.1(11)EA1 and later. The 2950 with the SI supports queuing and scheduling at egress. What QoS features does the 2950 standard image (SI) support?Ī. Refer to the Release Notes for the Catalyst 2955, Catalyst 2950, and Catalyst 2940 Switches, Cisco IOS Release 12.1(22)EA4 for hardware and software compatibility. The SI only supports the output scheduling QoS features, whereas the EI adds support for classification, marking, and policing. Several feature differences exist between the SI version and the EI version. The Catalyst 2950 series switches run two feature sets of Cisco IOS Software, a standard image (SI) and an enhanced image (EI). You can configure egress scheduling as either strict priority or weighted round-robin (WRR) scheduling. The switch makes the queue assignments on the basis of the priority or CoS value that is assigned to the frame at ingress. The 2950 queues frames at the egress port into one of four priority queues. For those frames that are received tagged, the 2950 uses the value in the tag. Frames that are received untagged are assigned this value. Each port on the switch gets a default priority value. The 2950 supports egress queuing and scheduling based on IEEE 802.1p class of service (CoS) values with Cisco IOS® Software Release 12.0(5)WC(1) and later. What is the software version requirement for the QoS features on Catalyst 2950 series switches?Ī. This document addresses the Frequently Asked Questions (FAQs) on the Quality of Service (QoS) features of the Cisco Catalyst 2950 series switches.
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