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tplink Posted:
Im trying to add
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DWSupport Posted:
After recent
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peterlee Posted:
Had a call from a
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rio
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HildBeft Posted:
You can recollect
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and open the
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massrman Posted:
The devices are
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massrman Posted:
Hi these are most
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configuration
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Has anyone setup a
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James44 Posted:
Hi, I am
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Vonage paul248, I'm not sure what your background is in making these suggestions; as



paul248, I'm not sure what your background is in making these suggestions; as I replied to you earlier, I have tried what you suggested and it did not work adequately. I have a broad and deep background in systems, networks, software, architecture, and lots more.


It is clear that the Linksys RT31P2 is a residential piece of crap. It is also clear to me for my particular environment from my empirical testing with sustained download and upload streams in TCP and IPsec (haven't done sustained UDP testing because I don't use sustained UDP applications other than Voip itself), that, no matter the consensus on this forum about the RT31P2, its traffic shaping feature does in fact do a pretty good job for me. (It is not true Quality of Service, which requires the active cooperation of the Internet Service Provider; it is traffic shaping).

What the number you type in to the RT31P2's "QoS" screen does is the same thing that the number told to the Linux kernel traffic shaper does - reserves a certain amount of bandwidth to the Voice over IP traffic *whenever that traffic is present*. When the voice traffic is not present, the traffic shaper in the device will not have a large impact on throughput.

My work with the Linux kernel traffic shaper some months ago for this very purpose was extensive and quite unsatisfactory. It included the same traffic shaper which you referenced in the link you supplied, as well as another possible solution. It is quite possible that, since that time, the capability of the Linux kernel traffic shaper has gotten better. I've spent as much time as I'm willing on that, unless someone has explicitly tested directly relevant configurations to suggest.


What started this whole waste of my time was that over the course of a few days several weeks ago, Vonage was having problems with their servers and was unwilling to admit the fact, so when I found my Motorola VT1005v getting stuck in "SIP Register", "401 Unauthorized" loops for hours at a time, Vonage decided that it must be a device problem. Even after the fateful few days of intermittent Voice over IP phone service, I would still see occasional (but fairly regular) instances of "SIP Register", "401 Unauthorized", "SIP Register (+authentication hash)", "200 OK". I made a mistake: I assumed this was wrong, contacted Vonage, and they sent me a Linksys RT31P2 to replace the Motorola VT1005v device, because as I noted above they wouldn't admit that they had an infrastructure problem, and they've decided to stop using the Motorola devices.

Last night, I checked my assumptions (Should have done this on day one, my mistake) and found that the Linksys RT31P2 does the same silly "SIP Register", "401 Unauthorized", "SIP Register (+authentication hash)", "200 OK" dance that the Motorola VT1005v does. Since both devices do this, and neither device is presently exhibiting the long periods of inability to register, I now conclude that the VT1005v was functioning correctly, and Vonage's infrastructure was having a problem at that time. I pulled the Linksys from the network and stuck the Motorola back in a few hours ago.

The Motorola VT1005v, when configured with its DHCP server and NAT capabilty disabled, does precisely the right bridging thing as far as I can tell both empirically and with extensive traffic captures on both the inside and outside of the devices (non-switched non-bridging hubs - one on each side of the voice adaptor - are great for diagnosis): the VT1005v transparently bridges everything - including ARPs - other than Voice over IP traffic destined to the Motorola VT1005v device itself. In this it is a decidedly smarter implementation of a Voice gateway than is the Linksys RT31P2 for networks which have an assigned range of static IP adresses like mine. My network appears to be working fine now.

The one thing I'm not sure that the Motorola does right is this: it may trap port 5061 traffic which is not addressed to its specific static IP address. Talking with Vonage escalation support, who got their Linksys technical rep on the phone with us, it is also unclear whether the Linksys RT31P2 device gets this right. That would be bad as it would occasionally interfere with RPC traffic that happened to randomly allocate a protocol and port which the Motorola mistakenly treats as voice traffic and therefore snags it off the wire instead of bridging it. As a rule, I don't allow anything like that (RPC, randomly assigned ports) to run through my firewall, so even if the Motorola has that flaw (which I simply don't know), it is unlikely to bite me.


The really unfortunate thing about this is that the Motorola VT1005v's traffic shaping does not work as well as the Linksys RT31P2's. A large download (e.g. XP SP2) will cause inbound voice data to get so fragmented that it is impossible to understand. The RT31P2 did a fine job of backing off that kind of traffic.


Sigh. Waste of time. If only Vonage actually knew the real capabilities of the devices they chose, or since someone in their engineering staff probably does know, if only Vonage would have made those details available to us, I could have saved a lot of time on my own admittedly poor assumptions that
1) they'd know the truth about the status of their equipment,
2) tell us the truth, and
3) know and divulge the capabilities of the devices they sell to us (and not foist a less technically capable but more user friendly device on us - the Linksys RT31P2 to replace the Motorola VT1005v).


So, where I am now is this:
1. I've requested to get back in touch with Vonage escalation support and to bring the Linksys support people back in to the conversation, where
2. I'll point out that their previous Motorola device bridged correctly and the Linksys does not and ask them to update the Linksys firmware to bridge correctly (should be possible to add as a firmware feature, and since their previous device did it I hope Vonage will agree that their new choice of device also should do it), and
3. I'm still hopeful that someone will come up with a way in the interim to get the Linux box to proxy ARP the way I need it to until Linksys fixes the firmware so that I can use the RT31P2 and get around the problem of it neither answers ARPs from my ISP nor bridging them.

Suggestions as to how to accomplish this proxy ARPing will be appreciated, as will references to explicit, Vonage and Linksys RT31P2 or Motorola VT1005v specific, well tested, reliably working Linux kernel traffic shaping scripts. Please don't refer me to tutorials on the subject - I've tried them, and am only interested in very specific success with this kind of setup. Lastly, suggestions of completely different hardware which actually gets both the bridging and the traffic shaping right will also be appreciated.

Thanks.
-Jay



Read The Full Thread:

Linksys RT31P2 ARP table, several static IP addresses


I have ten static IP addresses assigned to me by Speakeasy.net, set up as bridged
I think that your best solution in this case would be to put the Linux box in the DMZ
I appreciate the attempt, and I'll be kind :) I do not think that would work.
I would try putting the Vonage device BEHIND your linux box, and then figure out
There are options for packet priority in the Linux kernel, and I worked with them
[font=Courier New]Okay, so much for my idea of having a different interface (preferably
You seem to have created a more complex network setup than I've ever dealt with,
I have had the same experience...the sad thing is Vonage does not consider phone

libove posted "paul248, I'm not sure what your background is in making these suggestions; as" on 05/13/2005

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