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Dear All, 
 
&nbsp; Im configuring cisco qos in my cisco switches using the below commands. 
 
mls qos 
 
mls qos map cos-dscp 0 8 16 26 34 46 48 56 
 
no mls qos rewrite ip dscp 
 
my issue is that the below command is not available in some switches. 
 
mls qos map cos-dscp 
 
my current switch version 
 
Cisco IOS Software, C2960 Software (C2960-LANLITEK9-M), Version 12.2(44)SE6, REL 
EASE SOFTWARE (fc1) 
Copyright (c) 1986-2009 by Cisco Systems, Inc. 
Compiled Mon 09-Mar-09 18:10 by gereddy 
 
* &nbsp; &nbsp;1 26 &nbsp; &nbsp;WS-C2960-24TC-S &nbsp; &nbsp;12.2(44)SE6 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C2960-LANLITEK9-M 
 
please need your assistant 
 
Thanks
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</div>

Dear All,

  Im configuring cisco qos in my cisco switches using the below commands.

mls qos

mls qos map cos-dscp 0 8 16 26 34 46 48 56

no mls qos rewrite ip dscp

my issue is that the below command is not available in some switches.

mls qos map cos-dscp 

my current switch version

Cisco IOS Software, C2960 Software (C2960-LANLITEK9-M), Version 12.2(44)SE6, REL
EASE SOFTWARE (fc1)
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Mon 09-Mar-09 18:10 by gereddy

*    1 26    WS-C2960-24TC-S    12.2(44)SE6           C2960-LANLITEK9-M

please need your assistant

Thanks

Configuring cisco Quality of service on cisco 2960 &amp; 2950 switch

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

Configuring cisco Quality of service on cisco 2960 &amp; 2950 switch

Configuring cisco Quality of service on cisco 2960 & 2950 switch