For you Denon 3808 users who can't update the FW.
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Joined: Feb 2007
Posts: 602
aficionado
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OP
aficionado
Joined: Feb 2007
Posts: 602 |
OK, I just looked at the trace of 3808 doing a FW update check.
The IP stack actually starts out with a TTL (time to live) of 30. So here's how you can tell if your Denon update will work or not.
If you traceroute to 202.218.213.57 (the address in the packet trace) and you are more than 30 hops away, you will not be able to perform the update.
One more thing, they use a tcp window size of 8192. That's pretty small. Granted it's an AVR but still! The couldn't devote 16K to TCP so the update can happen twice as fast?
UPdate: I just tried to perform a traceroute. Some idiot ISP decided to block ICMP messages so you won't get that far. Oh well. But it does get you close enough to see how much wiggle room you have. When I did the traceroute, I got up to 23 hops. Since my update works, the denon's server's IP can't be more the 6 hops away from the the idiot ISP blocking the ICMPs.
-- Denon 4520, EPIC80/500/VP180 Speakers
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Apr 2007
Posts: 4,877
connoisseur
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connoisseur
Joined: Apr 2007
Posts: 4,877 |
-David
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Dec 2005
Posts: 3,301
connoisseur
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connoisseur
Joined: Dec 2005
Posts: 3,301 |
I didn't understand one word of that. Fortunately I don't have a 3808.
A computer once beat me at chess, but it was no match for me at kick boxing.
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Aug 2007
Posts: 3,488 Likes: 9
connoisseur
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connoisseur
Joined: Aug 2007
Posts: 3,488 Likes: 9 |
Homedad, it's about the age-old tale of the kid of has to trace his route back in the forest, but he only has 30 white stones. So, if the 38 and 08 parents are losing them in the forest too far, they will not be able to find their way back to the Upgrade Cottage when they used to live (before they moved to a USB2.0 Hotel).
See Mojo's signature
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
Fred
------- Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Feb 2007
Posts: 602
aficionado
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OP
aficionado
Joined: Feb 2007
Posts: 602 |
Homedad, it's about the age-old tale of the kid of has to trace his route back in the forest, but he only has 30 white stones. So, if the 38 and 08 parents are losing them in the forest too far, they will not be able to find their way back to the Upgrade Cottage when they used to live (before they moved to a USB2.0 Hotel). Not a bad analogy for getting the message across. But to be more specific, every packet on the Internet has a Time-to-live field. Every router will reduce it by one as the packet traverses the router. This is call "decrementing the TTL." Some home routers *don't* do this so the ISP can't pick up that you have a "router" Anyway, after 30 routers, the TTL will be zero. At that point, the router drops the packet and sends "TTL Expired in Transit" message to the original sender. This is in place so packets won't live forever on the Internet (if you have a loop for example).
-- Denon 4520, EPIC80/500/VP180 Speakers
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
Puppies are soooo cute.
i.e. : huh?
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Nov 2007
Posts: 868
aficionado
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aficionado
Joined: Nov 2007
Posts: 868 |
Dave
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Re: For you Denon 3808 users who can't update the FW.
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Joined: Feb 2008
Posts: 1,898
connoisseur
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connoisseur
Joined: Feb 2008
Posts: 1,898 |
I actually thought Hansang's explanation was pretty clear. (the second one.. the first one had me scratching my head a bit)
Epic 80-800: HG Cherry
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Re: For you Denon 3808 users who can't update the FW.
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Joined: May 2003
Posts: 18,044
shareholder in the making
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shareholder in the making
Joined: May 2003
Posts: 18,044 |
I am the Doctor, and THIS... is my SPOON!
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