2950 Class Of Service (COS)

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May 4th, 2009
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I understand there is COS available on the 2950. However, it depends on the type of software that it is running. There is an EI and SI version available. How are one tell, by looking at the output for the sho ver if the 2950 will support the COS.


Here is the example of a sho ver from one of my 2950s. How can I tell if it supports COS?


sho ver

Cisco Internetwork Operating System Software

IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(14)EA1a, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Tue 02-Sep-03 03:33 by antonino

Image text-base: 0x80010000, data-base: 0x805C0000


ROM: Bootstrap program is CALHOUN boot loader


SWA_055 uptime is 11 weeks, 4 days, 2 hours, 24 minutes

System returned to ROM by power-on

System restarted at 08:51:01 EST Thu Feb 12 2009

System image file is "flash:/c2950-i6q4l2-mz.121-14.EA1a.bin"


cisco WS-C2950-24 (RC32300) processor (revision M0) with 20710K bytes of memory.

Processor board ID FOC0751X0LN

Last reset from system-reset

Running Standard Image

24 FastEthernet/IEEE 802.3 interface(s)


32K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address: 00:0E:84:AE:0F:80

Motherboard assembly number: 73-5781-12

--More-- Power supply part number: 34-0965-01

Motherboard serial number: FOC075101CZ

Power supply serial number: PHI0748018C

Model revision number: M0

Motherboard revision number: B0

Model number: WS-C2950-24

System serial number: FOC0751X0LN

Configuration register is 0xF

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Giuseppe Larosa Mon, 05/04/2009 - 10:31
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Hello Doug,


your switch is running Standard image SI


see the line


>>Running Standard Image


so I'm afraid it doesn't support QoS.


Hope to help

Giuseppe


Joseph W. Doherty Mon, 05/04/2009 - 16:28
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The distinction between SI and EI versions is based on the hardware:


SI versions:


The Cisco Catalyst 2950SX-48, 2950T-48, 2950SX-24, 2950-24 and 2950-12 switches (Figures 1-5) are available only with the Standard Image (SI) software for the Cisco Catalyst 2950 Series. They cannot be upgraded to the Enhanced Image (EI) software.


• Cisco Catalyst 2950SX 48 Switch-48 10/100 Mbps ports with two fixed 1000BASE-SX uplinks


• Cisco Catalyst 2950T 48 Switch-48 10/100 Mbps ports with two fixed 10/100/1000BASE-T uplinks


• Cisco Catalyst 2950SX 24 Switch-24 10/100 Mbps ports with two fixed 1000BASE-SX uplinks


• Cisco Catalyst 2950 24 Switch-24 10/100 Mbps ports


• Cisco Catalyst 2950 12 Switch-12 10/100 Mbps ports


EI versions:


Cisco Catalyst 2950 Series switches consist of the following devices, which are only available with Enhanced Image software for the Cisco Catalyst 2950 Series.


• Cisco Catalyst 2950G 48-48 10/100 ports and 2 Gigabit Interface Converter (GBIC)-based Gigabit Ethernet ports


• Cisco Catalyst 2950G 24-24 10/100 ports and 2 GBIC ports


• Cisco Catalyst 2950G 24-DC-24 10/100 ports, 2 GBIC ports, DC power


• Cisco Catalyst 2950G 12-12 10/100 ports and 2 GBIC ports


• Cisco Catalyst 2950T 24-24 10/100 ports and 2 fixed 10/100/1000BASE-T uplink ports


• Cisco Catalyst 2950C 24-24 10/100 ports and 2 fixed 100BASE-FX uplink ports



SI version provide a very limited CoS, see http://www.cisco.com/en/US/tech/tk389/tk813/technologies_q_and_a_item09186a00804976d3.shtml

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