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Draytek-specific problems?: Amazon Echo/Dot and Harmony Hub

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20 Jan 2017 12:01 #87853 by psykix
Replied by psykix on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony
That's rather interesting.. have you logged a ticket about it?

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20 Jan 2017 12:05 #87854 by aa111
Replied by aa111 on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony

psykix wrote: That's rather interesting.. have you logged a ticket about it?


Yes, I submitted a support ticket this morning (reference: DQ524877).

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20 Jan 2017 12:07 #87855 by psykix
Replied by psykix on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony
Let's to see if they come up with anything.. Watching this thread with interest!

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20 Jan 2017 15:36 #87856 by admin3
Replied by admin3 on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony
I find it interesting that the problem occurs randomly, I suspect it's a session timeout issue - where the Harmony Hub is making an HTTP or UDP session and this is dropped by the router after some time because it appears to be idle.

In the telnet interface, try using the "portmaptime" command, which controls the timeouts for different types of sessions in seconds.
"portmaptime -l" lists the current settings
"portmaptime ?" displays the syntax
"portmaptime -u 86400" would set the UDP session timeout up to 24 hours (in seconds, its default is 300)

The timeout values for TCP WWW Timeout and TCP SYN Timeout might also be worth testing (their defaults are 60 seconds)

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21 Jan 2017 11:52 #87860 by aa111
Replied by aa111 on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony

admin3 wrote: I find it interesting that the problem occurs randomly, I suspect it's a session timeout issue - where the Harmony Hub is making an HTTP or UDP session and this is dropped by the router after some time because it appears to be idle.

In the telnet interface, try using the "portmaptime" command, which controls the timeouts for different types of sessions in seconds.
"portmaptime -l" lists the current settings
"portmaptime ?" displays the syntax
"portmaptime -u 86400" would set the UDP session timeout up to 24 hours (in seconds, its default is 300)

The timeout values for TCP WWW Timeout and TCP SYN Timeout might also be worth testing (their defaults are 60 seconds)


Many thanks admin3, that was very helpful. After playing with different values I've now narrowed it down to TCP WWW Timeout. Default value on my Draytek was 60 seconds. After a bit of testing I've now set it to 3600 and external connections to the Harmony Hub have been rock solid since. Obviously need a bit more time to make sure, but this looks very promising!

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21 Jan 2017 13:04 #87861 by c128
Replied by c128 on topic Re: Draytek-specific problems?: Amazon Echo/Dot and Harmony
Ditto response to admin3 - thanks very much for that!

To echo aa111's reply, I'm seeing 100% success*, at least at the moment, with TCP WWW Timeout upped to the value he's using.

Will also see whether this solves the problem given a bit of time...

* Now, if I can just get my Echo to reliably not mistake "Light" for "Lights" and "Test" for "Tennis" (?) this could actually be a winner - that's certainly not a Draytek issue though :D .

PS - in terms of timeouts, are there any possible negative impacts from upping them from the defaults?

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