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Vonage There seems to be some interest in Sveasoft Alchemy QoS functionality and its
There seems to be some interest in Sveasoft Alchemy QoS functionality and its use with Voip, so I figured I would provide a basic overview of setting up an environment of this type.
For the sake of this example, let's assume that we have a network configuration like this:
First, Sveasoft Alchemy is an open source custom firmware for Broadcom chip based 802.11b/g wireless access points (like the Linksys WRT54G/GS) with additional features not provided by the standard vendor firmware. (it can be downloaded free of charge at wrt54g.net ).
The Sveasoft Alchemy QoS functionality allows you to assign priorities to certain types of bandwidth:
Premium (1:10) - Highest priority bandwidth
Express (1:20) - Next highest priority
Standard (1:30) - Default priority
Bulk (1:40) - Lowest priority
An example Sveasoft Alchemy QoS configuration for a Vonage environment with 1.5Mbps/384Kbps (average Speakeasy Speed Test reports ~1489/350 Kbps) DSL service looks like this:
http://WRT54G/QoS.asp
The initial settings are pretty straight forward:
Uplink kbps : Start at 90% of upload bandwidth from Speakeasy speed tests (~315 in this example)
Dnlink kbps : Start at 90% of download bandwidth from Speakeasy speed tests (~1340 in this example)
SIP Service priority : Set to premium to prioritize Voip traffic
WAN MAC address of Vonage adapter : Value can be found printed on a sticker on the bottom of the Vonage adapter ( 00:13:10:AC:A0:87 in this example). Set to premium to prioritize traffic for the Vonage adapter.
Once the initial QoS configuration is complete, reboot your router by unplugging it or by executing the reboot command from the Sveasoft GUI (Administration->Diagnostic->Run). Please note that things may work properly without a reboot, but It is not a bad idea to reboot after changing any Sveasoft QoS settings.
Now it is time to test the effectiveness of this configuration. The simplest test is to do three things simultaneously:
continuously ping a local server (like verizon.net) and watch for fluctuations in ping times
make a Vonage phone call to test call quality
generate some heavy Uplink network traffic (like ftp'ing a large local file to a remote site)
Things to look for during the test:
Make sure voice quality of the phone call is acceptable.
Make sure ping times don't fluctuate wildly between an idle state and when making phone calls and when generating ftp traffic. Slight fluctuations are normal, but going from 30ms to 1000ms indicates a potential problem.
Make sure the Sveasoft QoS functionality is prioritizing traffic as expected. This can be done by executing tc -s class show dev imq0 on the WRT54G/GS from a ssh session ( PuTTY is a free ssh client if you need one) or from the Sveasoft GUI (Administration->Diagnostic->Run):
From this output, we can see that the premium priority (1:10) Voip traffic sent 1816086/1911065 bytes, while standard traffic (including the ftp upload) (1:30) sent only 94979/1911065 bytes. Therefore, the Sveasoft QoS functionality did its job and reserved available bandwidth for the higher priority Voip traffic.
Finally, the Uplink and Dnlink kbps settings can be tweaked as needed. If you have large swings in ping times, then one or both of these values may need to be decreased somewhat.
You can also prioritize other traffic to suit your environment. For example, if you use things like p2p software, you can assign that traffic to the Bulk priority so that it won't interfere with things like your Vonage service or general web browsing.
Read The Full Thread: HowTo: Vonage and QoS with Sveasoft Alchemy Firmware
• FWIW, I've had better success giving the Vonage adapter a DHCP reservation in
• The thought behind prioritizing the SIP traffic was for the benefit of testyourvoip.com
• Well, once everything's up & running, I could care less what my testyourvoip.com
• Yeah, but the configuration you describe effectively uses the bulk queue as the
• When I follow this setup...my Vonage box (RT32P) reboots every 4 or 5 minutes automatically.
any
• No idea why using this configuration would cause that to happen...
Does the
• I do...he is trying to push it onto a RT31P2. :-D
Just one of those days...
• hmmm...what do you mean Trowski? Do you know if this setup will not work with this
• I think I know what Trowski's getting at... What router model and version (from
polarisdb posted "There seems to be some interest in Sveasoft Alchemy QoS functionality and its" on 08/26/2005 |
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