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09-27-2012 03:57 PM
09-27-2012 03:57 PM
Hi,
I have 1 HP2910al-24G and 4 HP 2620's and I have the need to run QoS due to the Voice traffic on the network. All the 2620's uplink to the 2910.
I know there are a lot of QoS options but it's quite confusing. We have hard phones that connect to the switch (and the PC's connect to the phones). The phones tag Voice traffic into VLAN10.
So based on this, I setup VLAN 10 on all the switches and made it the Voice VLAN. Below is an excerpt from one of the 2620's.
I have a couple of questions.
1) If I set a VLAN to VOICE, I don't need to use any of the QoS options like dscp do I? Something tells me I don't need this but I can't seem to find much in the docs either way.
2) For the 2620's all ports should be UNTAGGED into Vlan1 and Tagged into VLAN10 correct?
I don't think I need any QoS settings if I use the VOICE vlan option yes?
Any insight would be most appreciated.
Thank you,
-Steve
qos dscp-map 100110 priority 7
vlan 1
name "DEFAULT_VLAN"
untagged 1-52
ip address 10.42.42.16 255.255.255.0
exit
vlan 10
name "Voice"
qos dscp 100110
tagged 1-52
voice
no ip address
exit
Solved! Go to Solution.
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09-28-2012 04:18 PM
09-28-2012 04:18 PM
SolutionHi Steve,
I've never found any documentation on this, but my local SE told me a few years back that adding the voice keyword to a VLAN does the following:
- enables LLDP-MED
- sets 802.1p to 6
- sets DSCP to EF, and
- transmits the Vlan ID to the end device.
That seems to indicate that you're right and that no QoS settings are necessary.
Paul
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09-28-2012 04:19 PM
09-28-2012 04:19 PM
Re: QoS options on HP2910 and 2620 for voice traffic
Paul
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09-29-2012 10:47 AM
09-29-2012 10:47 AM
Re: QoS options on HP2910 and 2620 for voice traffic
Hi
1) If I set a VLAN to VOICE, I don't need to use any of the QoS options like dscp do I? Something tells me I don't need this but I can't seem to find much in the docs either way.
Generally you’re right, but you can add this command to voice VLAN, "qos priority 5", just in case..
There is a lot of tweaking that you can do to improve voice traffic, it’s not necessary QOS commands on voice Vlan, it could be QOS command for entire network, but i think let the voice traffic to "run" for couple of weeks and if the clients having some problems with the voice then you can make some steps to improve it.
2) For the 2620's all ports should be UNTAGGED into Vlan1 and Tagged into VLAN10 correct?
yes.
good luck :)
Meir.H
CCNA
MCITP
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10-01-2012 10:00 AM
10-01-2012 10:00 AM
Re: QoS options on HP2910 and 2620 for voice traffic
Thanks everyone for the input.
Apparently I can only flag one response as a Solution. I wish I could flag a second one.
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10-01-2012 04:35 PM
10-01-2012 04:35 PM
Re: QoS options on HP2910 and 2620 for voice traffic
The only other question I have is now that I have VLAN10 as the Voice VLAN, how can I see that Voice traffic is actually prioritized?
Are there any commands I can run to see that this is actually working?
Thanks again,
-Steve
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10-02-2012 12:01 PM
10-02-2012 12:01 PM
Re: QoS options on HP2910 and 2620 for voice traffic
I would really like to know if there is anyway to tell if setting the Voice VLAN actually is working.
I ask because I can't seem to find any commands that show me this is working.
NY-HP2620-2# show qos vlan-priority
VLAN priorities
VLAN ID Apply rule | DSCP Priority
------- ----------- + ------ -----------
1 No-override | No-override
10 No-override | No-override
NY-HP2620-2#
Is there anyway to tell that the Voice VLAN is actually prioritized?
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10-02-2012 02:22 PM - edited 10-02-2012 02:24 PM
10-02-2012 02:22 PM - edited 10-02-2012 02:24 PM
Re: QoS options on HP2910 and 2620 for voice traffic
Hi
i'm, meirhasin from the top of the thread, i just opened new account to get new name :)
about qos utilization, try to goolge this command:
sh qos resources
M.H.
CCNA
MCITP
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10-02-2012 04:26 PM
10-02-2012 04:26 PM
Re: QoS options on HP2910 and 2620 for voice traffic
Thanks.
What's interesting about 'show qos resources' is that you get different responses on a 2910 vs a 2620.
On a 2910 it does shomw some stats but they're all '0' and then at the bottom it clearly states this command does not report on VLAN priority:
"Resource usage includes resources actually in use, or reserved for future
use by the listed feature. Internal dedicated-purpose resources, such as
port bandwidth limits or VLAN QoS priority, are not included."
On a 2620 I see something completely different although it makes no sense whatsoever.
show qos resources
Policy Engine Resource Usage
Rules Rules Group
Group Allocated Used Number
------------------------+------------+------------+------------+
QoS | 0 | 0 | 1 |
rate-limit/misc | 128 | 2 | 2 |
CLI-ACL | 0 | 0 | 3 |
IDM-ACL | 0 | 0 | 4 |
Free | 1920 |
QoS Group Usage Detail
Rules Group
Type Used Number
-------------------------------------+------------+------------+
internal (double tag drop) | 2 | 2 |
So I am not sure this is giving me what I want to see.
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10-06-2012 03:27 PM
10-06-2012 03:27 PM
Re: QoS options on HP2910 and 2620 for voice traffic
> I can only flag one response as a Solution. I wish I could flag a second one.
Right. But you can assign Kudos to each post that helps you.