Cisco WAN :: 3750E - SRR-Queue And Traffic Prioritization?

Jul 12, 2011

I have two goals on my Cisco 3750E -
 
* Limit bandwidth to match carrier provided bandwidth (10M ethernet port, but only 6M provisioned)

* Prioritize some traffic over others through the use of a priority queue.
 
I have come up with this design:
 
access-list 100 remark priority traffic
access-list 100 permit ip 10.1.1.0 0.0.3.255 any
access-list 100 permit ip any 10.1.1.0 0.0.3.255

[Code]....

How do I know?  Is there a show command to show priority packets?
 
Am I right in assigning dscp 46 to this interesting traffic?  That way it goes to queue 2?
 
Am I right in applying the priority-queue out command to the interface?
 
We also have voice traffic.  But I think i can trust it to queue up into the router with trusted dscp

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Cisco Switching/Routing :: 3750E / Traffic Prioritization Involving VLANs?

May 30, 2012

I have a device which will be sending voice and data packets and is able to mark the packets with DSCP values.   Voice, 18 and Data 42.If this was a straight through network, I'd be clear on how to handle this, but.....I will be putting this traffic into a VLAN to isolate it from some other traffic on the network.  What is the best way to prioritize this traffic inside the VLAN?  Will the Cisco switch look at and respect the DSCP values inside the VLAN and prioritize accordingly inside the VLAN?  Or, do I need to do some sort of DSCP to 802.1p mapping? Another option I would be fine with would be mapping the DSCP values for voice and data to two different VLANs and then giving the voice VLAN priority over the data VLAN .... I'm using 3750E switches.

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We tested a QoS in a Cisco 3750E, IOS: 12.2(58)SE2.Voice traffice in the correct Q without any problem, but all the others traffic the Defualt Q (0), tried to capture the traffic and tcp/udp port are correct.Any thing wrong with my ACL or DSCP - CoS?? ( that ACL works fin on 4500 and 6500) [code]

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Dec 28, 2011

I have a new VOIP implementation using 2960 switches. I want to prioritize voice traffic. After creating VLAN 2 I did the following:

Per Cisco, I did the following on my up-link ports:

switch port trunk allowed vlan 1,2
switch port mode trunk
switch port nonegotiate
priority-queue out
mls qos trust cos
switchport trunk allowed vlan 1,2
switchport mode trunk
switchport nonegotiate
priority-queue out
mls qos trust cos
spanning-tree port fast trunk
spanning-tree bpduguard enable
 
On my ports where a VOIP phone was plugged in, I did the following:
 
switch port trunk allowed v lan 1,2switchport mode trunk switch port no negotiate priority-queue outmls qos trust cos spanning-tree port fast trunk spanning-tree bpduguard enable
  
How can I verify that my voice traffic is being prioritized?

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Trying to set-up a priority queue for Voice and Video traffic, below is the current ASA config. The WAN link is 6mb, trying to limit the Internet traffic to 4mb and save 2mb for the PQ, config belowTraffic just isn't hitting the PQ
 
priority-queue outside
  queue-limit   512
  tx-ring-limit 200
 !
  class-map Video
description Video
match dscp af31

[code]....

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Cisco Switching/Routing :: 3560 - Configuring Qos / Traffic To Go Into High Priority Queue

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i have a 3560 connecting to a sp with limited bandwidth. i have one interface on the switch whose traffic i do not want to drop. i want this traffic to go into the high priority queue. i am not sure how this should be configured, but here is my best guess and my current qos configuration on the switch:
 
qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 1 4 6 7
mls qos srr-queue output cos-map queue 2 threshold 2 3(code)
 
since cos 5 is mapped to dscp 46 then this traffic would go into the priority queue. is this correct ?

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Cisco Switching/Routing :: C3750 Prioritization Based On Dscp Or Cos Values

Oct 26, 2011

I'm working on a catalyst c3750 and for my work i need to prioritize certain streams independent of their bandwith usage.

The streams are the following:
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- video
- data
 
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policy-map VOICE
  class class-default
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[Code]...

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Switch Ports Model              SW Version            SW Image               
------ ----- -----              ----------            ----------             
     1 28    WS-C3750G-24TS-1U  12.2(50)SE2           C3750-IPBASEK9-M       
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[Code]...

Is there any IOS or any H/W issue???

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Also which IOS should I be upgrading to?
 
c3750e-ipbasek9-mz.150-2.SE.bin
or
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[Code].....

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[code]...

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Gi1/1/2:     0
Gi1/1/3:     0
Gi1/1/4:     0
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Gi2/1/2:     4251090833
Gi2/1/3:     4251754140
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Po2:          0
Po3:          0
P04:          0
 
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IOS version: C3750E-IPBASEK9-M 12.2(58)SE2

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IP BASE
 c3750e-ipbasek9-mz.122-53.SE2.bin        and for my 3750G switch should i use
  
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-------------------------------------------
 
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----    -----------       --------    -----
 
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