QoS for VoIP on ICX switches

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  • Updated 9 months ago
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Hello all,

I'm trying to set up some basic QoS functionality on a number of ICX7150 switches.  I have all of my phones in a particular vlan and would like to have the switch mark any incoming packets on that vlan with an appropriate DSCP value.  I thought that the command to do this was ip-dscp-remark 46, on the vlan in question.  But this doesn't apply to the vlan, but rather the whole switch.  

Anybody have any idea on how to do this?
Photo of Chris Everett

Chris Everett

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Posted 10 months ago

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10 months ago
Photo of Paul McGuire

Paul McGuire

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You should only need “trust dscp” on each port that has a phone.
10 months ago
Photo of NETWizz

NETWizz

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Paul is correct provided the phone marks the DSCP value on the packets.  If not, there really is not much of a way to create classes and queues in the ICX environment.
9 months ago
Photo of Yorix

Yorix

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For VoIP I use these settings:

lldp med network-policy application voice tagged vlan <vlan_for_voice> priority 7 dscp 46 ports ethe 1/1/x to 1/1/xx
lldp med network-policy application voice-signaling tagged vlan <vlan_for_voice> priority 7 dscp 42 ports ethe 1/1/x to 1/1/xx

And on each ports, I have :

 loop-detection
 dual-mode  <vlan_for_workstation>
 spanning-tree root-protect
 spanning-tree 802-1w admin-edge-port
 inline power power-by-class 2
 voice-vlan <vlan_for_voice>
 stp-protect
 broadcast limit 12000
 unknown-unicast limit 10000
 stp-bpdu-guard
 trust dscp






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