topic Re: QoS for VoIP on ICX switches in ICX Switches

QoS for VoIP on ICX switches

chris_everett_f — Wed, 06 Feb 2019 21:00:29 GMT

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?

Re: QoS for VoIP on ICX switches

paul_mcguire_20 — Wed, 06 Feb 2019 21:08:45 GMT

You should only need “trust dscp” on each port that has a phone.

Re: QoS for VoIP on ICX switches

netwizz — Wed, 13 Feb 2019 15:36:41 GMT

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.

Re: QoS for VoIP on ICX switches

eric_pouliot — Fri, 01 Mar 2019 20:35:33 GMT

For VoIP I use these settings:

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

And on each ports, I have :

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