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Re: X10 R9000 gigabit LAN link dropped to 100M

glitch101
Aspirant

X10 R9000 gigabit LAN link dropped to 100M

X10 R9000 connected to a gigabit switch. Runs flawlessly for months, easily showing 940Mbps downloads on my gigabit ISP. Then one day, LAN link goes down to 100M and refuses to connect to switch at 1000M. Light is amber. Neither cable nor Switch changed, nothing changed...except maybe an auto firmware upgrade? router is running 1.0.4.2 firmware. Tried all ethernet ports. Will not connect at 1000M, only 100M. Bummed out!

 

Model: R9000|Nighthawk X10 AD7200 Smart WiFi Router
Message 1 of 4

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glitch101
Aspirant

Re: X10 R9000 gigabit LAN link dropped to 100M

Thanks for your response. Some more details:

(gigabit switch in question is TP-link TL-SG1016)

(when I said 'tried all ports' I meant the LAN ports on the R9000 paired to various ports on the TP-link switch, using the same wire which had provided 1000M for a few months -- remember the issue was a sudden drop to 100M on the same hardware and same cables)

 

A laptop connected directly to the R9000 came on at 1000 (white light instead of amber)

 

A few reboots of the R9000 and the link returned to 1000M. Unfortunately, its impossible to know whether reboots did it or shuffling cables a little bit helped, since both things happened at the same time. It's entirely possible that the cat 5e cables (which are old) have worn spots that are sensitive to bends and cause the unit to drop down to 100M. A more scientific test would have been to use new cables before rebooting. 

 

Your comment of the cable quality as a suspect was useful in any case. I will replace all cables with new cat 6 and save future aggravation.

 

Consider this case closed. Thank you.

 

 

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Message 3 of 4

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antinode
Guru

Re: X10 R9000 gigabit LAN link dropped to 100M

> [...] a gigabit switch [...]

   Not a very detailed description of anything.

> [...] one day, LAN link goes down to 100M and refuses to connect to
> switch at 1000M. Light is amber. Neither cable nor Switch changed,
> nothing changed...except maybe an auto firmware upgrade?

   A bad cable could explain that.  10/100MHz uses two pairs; 1000MHz
uses all four pairs.  (Many bad cables began life as good cables.)

> [...] Tried all ethernet ports. [...]

   Tried _what_ with all Ethernet ports?  Can you connect any pair of
ports with one cable, and get a 1000MHz link?  Does that cable not work
as expected between an R9000 LAN Ethernet port and the (unspecified) "a
gigabit switch"?  Between an R9000 LAN Ethernet port and some
(known-good) gigabit port on some other device?

   Where's the evidence that the R9000 is at fault, and not some other
piece of this puzzle?

Message 2 of 4
glitch101
Aspirant

Re: X10 R9000 gigabit LAN link dropped to 100M

Thanks for your response. Some more details:

(gigabit switch in question is TP-link TL-SG1016)

(when I said 'tried all ports' I meant the LAN ports on the R9000 paired to various ports on the TP-link switch, using the same wire which had provided 1000M for a few months -- remember the issue was a sudden drop to 100M on the same hardware and same cables)

 

A laptop connected directly to the R9000 came on at 1000 (white light instead of amber)

 

A few reboots of the R9000 and the link returned to 1000M. Unfortunately, its impossible to know whether reboots did it or shuffling cables a little bit helped, since both things happened at the same time. It's entirely possible that the cat 5e cables (which are old) have worn spots that are sensitive to bends and cause the unit to drop down to 100M. A more scientific test would have been to use new cables before rebooting. 

 

Your comment of the cable quality as a suspect was useful in any case. I will replace all cables with new cat 6 and save future aggravation.

 

Consider this case closed. Thank you.

 

 

View solution in original post

Message 3 of 4
antinode
Guru

Re: X10 R9000 gigabit LAN link dropped to 100M

> [...] It's entirely possible that the cat 5e cables (which are old)
> have worn spots that are sensitive to bends and cause the unit to drop
> down to 100M. [...]

   I'd guess that the most common cable failure mode would be a bad
connection at one of the connectors.  In some cases, inspection (with
some magnification) will reveal a wire which didn't get pushed in fully,
of some similar defect.  Or some gentle tugging/wiggling.

> [...] I will replace all cables with new cat 6 and save future
> aggravation.

   You could do that, but imagine the feeling of triumph if/when it
fails again, and replacing that one suspect cable solves the problem.
(It's a philosophical question.)

   Whether or not perfect blame assignment was achieved, you at least
have more potential culprits to investigate next time.  Glad to hear
about the white LED, in any case.

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