Regarding IOS image + cisco WS-C4948E switch + auto QoS

[satishmothukri]

Hi All ,

I have 4948E moduler switch at customer site and below is the show version output.

Image on the switch is not supporting 'AUTO QoS' as i need to enable Auto Qos on it to prioritize Voice traffic.

Which image supports Auto QoS feature . Image should have L3 functionality also i mean it should support Routing protocols.

I tried to enable auto QoS using by configuring "QoS' globally but no luck...with existing image.

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICES-M), Version 12.2(54)SG1, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Thu 27-Jan-11 11:57 by prod_rel_team

Image text-base: 0x10000000, data-base: 0x12C245CC

ROM: 12.2(44r)SG9

Hobgoblin Revision 20, Fortooine Revision 1.22

Switch uptime is 12 hours, 1 minute

System returned to ROM by reload

System image file is "bootflash:cat4500e-entservices-mz.122-54.SG1.bin"

cisco WS-C4948E (MPC8548) processor (revision 5) with 1048576K bytes of memory.

Processor board ID CAT1518S0T9

MPC8548 CPU at 1GHz, Cisco Catalyst 4948E

Last reset from Reload

2 Virtual Ethernet interfaces

48 Gigabit Ethernet interfaces

4 Ten Gigabit Ethernet interfaces

511K bytes of non-volatile configuration memory.

Configuration register is 0x2012

Switch#sh bootflash:

-#- --length-- -----date/time------ path

1     25793234 May 31 2011 15:20:20 cat4500e-entservicesk9-mz.122-54.SG.bin

2     25005209 Mar 08 2013 09:53:18 cat4500e-entservices-mz.122-54.SG1.bin

70033408 bytes available (58249216 bytes used)

Thanks ,
M S K       

[Steve Fuller]

Hi,

The Auto-QoS feature is supported in the LAN Base, IP Base and Enterprise Services feature sets so this problem should not be related to the feature set you're using. You can see this from Figure 1 of the Release Notes for Catalyst 4900M Series Switch and Catalyst 4948E.

Do you get an error when you execute the qos command in global context? If so can you paste the output please?

Additionally can you paste the output of the show qos command and what options or error you see when trying to configure the auto qos voip command within the interface context?

ocs4948-1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

ocs4948-1(config)#int gi1/1

ocs4948-1(config-if)#auto qos voip ?

  cisco-phone  Trust the Qos marking of Cisco IP Phone

  trust             Trust the DSCP/CoS marking

[..]

Regards

[sbhadrav@cisco.com]

To display the QoS commands that are automatically generated when auto-QoS is enabled or disabled, enter the debug auto qos privileged EXEC command before you enable auto-QoS. For more information, see the debug auto qos command in the command reference for this release.

To disable auto-QoS on a port, use the no form of the auto qos command interface configuration command, such as no auto qos voip.
Auto-QoS generated global commands can also be removed manually if desired.
Only the auto-QoS-generated interface configuration commands for this port are removed. If this is the last port on which auto-QoS is enabled and you enter the no auto qos voip command, auto-QoS is considered disabled even though the auto-QoS-generated global configuration commands remain (to avoid disrupting traffic on other ports affected by the global configuration).

You can use the no mls qos global configuration command to disable the auto-QoS-generated global configuration commands. With QoS disabled, there is no concept of trusted or untrusted ports because the packets are not modified (the CoS, DSCP, and IP precedence values in the packet are not changed). Traffic is switched in pass-through mode (packets are switched without any rewrites and classified as best effort without any policing).