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тАО06-18-2010 11:04 AM
тАО06-18-2010 11:04 AM
dscp / qos / queue depths
My understanding for Provision switches, the default mappings do not need to be defined; true?
Also, when set to a a 4 buffer queue, the
.1p pri TO
qos queue and depth TO
dscp priority map
goes something like this:
802.1p Pri 2
qos queue 1 - depth 8%
qos dscp-map 001110 priority 2
802.1p Pri 1
qos queue 1 - depth 8%
qos dscp-map 001010 priority 2
802.1p Pri 1
qos queue 1 - depth 8%
qos dscp-map 001100 priority 2
802.1p Pri 0
qos queue 2 - depth 17%
qos dscp-map 010010 priority 0
802.1p Pri 0
qos queue 2 - depth 17%
qos dscp-map 010100 priority 0
802.1p Pri 3
qos queue 2 - depth 17%
qos dscp-map 010110 priority 0
802.1p Pri 4
qos queue 3 - depth 30%
qos dscp-map 011010 priority 3
802.1p Pri 4
qos queue 3 - depth 30%
qos dscp-map 011100 priority 3
802.1p Pri 5
qos queue 3 - depth 30%
qos dscp-map 011110 priority 3
802.1p Pri 6
qos queue 4 - depth 45%
qos dscp-map 100010 priority 4
802.1p Pri 6
qos queue 4 - depth 45%
qos dscp-map 100100 priority 4
802.1p Pri 7
qos queue 4 - depth 45%
qos dscp-map 100110 priority 4
802.1p Pri 7
qos queue 4 - depth 45%
qos dscp-map 101110 priority 5
Is this corect?
So all i need to do to set the dscp map to a vlan is this:
vlan
qos dscp 110100
True?
So if I am trying to get my voice into the highest percentage queue, is there any difernce between a dscp map of 100010 100100 100110 110100 regarding switch cpu time? If so, what?
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тАО06-22-2010 12:19 AM
тАО06-22-2010 12:19 AM
Re: dscp / qos / queue depths
[no] interface vlan VLAN-ID voice
Usage: [no] voice
Description: Labels this VLAN as a Voice VLAN, allowing you to separate, prioritize, and authenticate voice traffic moving through
your network.
This is a VLAN context command. It can be called directly from the VLAN context or follow the 'vlan VLAN-ID' command.
No need to manually create queues, qos values etc.....
- can't answer the question about cpu usage, but my guess would be that the impact on cpu is not different between dscp values.
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тАО07-01-2010 10:38 AM
тАО07-01-2010 10:38 AM
Re: dscp / qos / queue depths
Anyhow, I belive you are corerct in that I am splitting hairs with regard to cpu useage differences between code point 46 to 63. I am just curious to know why someone might want to set dscp to 46 from one vlan and 63 in another.
ideas?
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тАО09-28-2012 11:27 AM
тАО09-28-2012 11:27 AM
Re: dscp / qos / queue depths
I have a somewhat similar question but I started a new thread since it's not exactly the same. However some of the points made here seem to answer my questions.
If I use the 'voice' option I do not need to use the QoS options?