SPA942 with attached PC: Voice VLANS

Answered Question
Sep 15th, 2009

I wish to provide QoS best practice by configuring seperate VLANS for data and voice. I am using the SRW208P switch. With the 7940 IP phone and a catalyst switch one would trust CoS and trust device cisco Phone and configure an Aux VLAN at the switch.  Can anyone assist me with the equivalent using the SMB hardware?

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Correct Answer by Patrick Born about 7 years 2 months ago

Hi beckerli,

The SPA9000 Installation Guide addresses QoS/CoS on a switch which you may find relevant to your SPA942 question:

http://www.cisco.com/en/US/docs/voice_ip_comm/csbpvs/spa9000/installation/guide/spa9000_voice_system_webui_ig.pdf

The SRW208P's admin Guide will also be of use to you:

http://www.cisco.com/en/US/docs/switches/lan/csbms/srw2008/administration/guide/SRW2008_V10_UG_B-WEB.pdf

Here's a document about VLANs and DSCP in a small business env. that you may find interesting:
https://www.myciscocommunity.com/docs/DOC-7433

The SPA942 by default marks SIP with a ToS/DiffServ value of 0x68 and RTP with 0xb8 [DSCP cs3 and ef respectively]

Configure at phone's web-ui > Ext N tab > Network Settings >

[click image to view]

cap-844.jpg

By default, the phone does not have VLANs enabled and does not tag the PC port data either.

Configure at: System tab > VLAN Settings >

[click image to view]



cap-843.jpg

Regards,

Patrick

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Correct Answer
Patrick Born Tue, 09/15/2009 - 16:46

Hi beckerli,

The SPA9000 Installation Guide addresses QoS/CoS on a switch which you may find relevant to your SPA942 question:

http://www.cisco.com/en/US/docs/voice_ip_comm/csbpvs/spa9000/installation/guide/spa9000_voice_system_webui_ig.pdf

The SRW208P's admin Guide will also be of use to you:

http://www.cisco.com/en/US/docs/switches/lan/csbms/srw2008/administration/guide/SRW2008_V10_UG_B-WEB.pdf

Here's a document about VLANs and DSCP in a small business env. that you may find interesting:
https://www.myciscocommunity.com/docs/DOC-7433

The SPA942 by default marks SIP with a ToS/DiffServ value of 0x68 and RTP with 0xb8 [DSCP cs3 and ef respectively]

Configure at phone's web-ui > Ext N tab > Network Settings >

[click image to view]

cap-844.jpg

By default, the phone does not have VLANs enabled and does not tag the PC port data either.

Configure at: System tab > VLAN Settings >

[click image to view]



cap-843.jpg

Regards,

Patrick

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beckerli Wed, 09/16/2009 - 01:49

Hi Patrick, thank you for your prompt and very thourough reply and going to the effort of directing me to all the necessary resources. It has helped me arrive quickly at a solution for my client.  You are an asset to the Cisco community!

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