The surge suppressors are a possibility, grounding or bad crimps no. Also
I'm not seeing CRC errors even when it runs at 100M, just 2 second link down
events.
I might want to try GigE capable SyncInjector and surge protectors but don't
have the parts on hand at the moment. I don't really need the 450 APs to
run at GigE, but 10M is problematic.
-----Original Message-----
From: Shayne Lebrun via Af
Sent: Wednesday, November 26, 2014 12:23 PM
To: [email protected]
Subject: Re: [AFMUG] 450 AP still dropping to 10M Ethernet w/Mikrotik?
From what you're describing, I'd say you're having physical Ethernet
issues;
cable isn't grounded but should be, bad crimps or ends, surge suppressor
giving you grief, etc etc.
-----Original Message-----
From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof via Af
Sent: Wednesday, November 26, 2014 11:48 AM
To: [email protected]
Subject: Re: [AFMUG] 450 AP still dropping to 10M Ethernet w/Mikrotik?
My worry about getting cut off is from the AP, not the Mikrotik.
And I should clarify, I'm not looking for a way to bandaid this with
hardcoded speeds, it should work with auto and does most places. And I
think hardcoding to 100M may just leave me with the link flapping up and
down, which seems to be the fundamental problem.
What I'm trying to find out is if other people are seeing this. Cambium
supposedly did a FW fix awhile back for 450 AP Ethernet problems, I think it
may even have been specific to connecting the AP via a POE that does not
support Gigabit. I'm trying to determine where the problem might be - the
list of suspects could be router, POE (Packetflux SyncInjector), surge
protector (WB APC), cable (~100 feet of Belden shielded Cat5e), or AP.
At one site, I have 4 APs and 2 of them are exhibiting this problem. I want
to swap out the APs last because that's an expensive experiment. I am going
to try swapping Mikrotik ports, maybe SyncInjector ports, maybe replace or
bypass the surge protectors. I am still wondering if Cambium fixed
something in the FW and then broke it again in 13.2.
I'm also wondering if the 450 APs would be happier talking to a non gigabit
router port, or maybe with the gigabit version of SyncInjector, although I
have other APs that are happy with this setup.
-----Original Message-----
From: Shayne Lebrun via Af
Sent: Wednesday, November 26, 2014 10:04 AM
To: [email protected]
Subject: Re: [AFMUG] 450 AP still dropping to 10M Ethernet w/Mikrotik?
General reminder: when hardcoding Ethernet, you must hardcode both ends to
the same settings. You cannot hardcode one end, as autonegotiate cannot
properly deal with that scenario.
Removing advertised speeds and duplexes, on the other hand, can be done on
one end.
Also, mikrotik's safe mode is your friend for this sort of thing. It's not
quite as good as a cisco 'reload in 5' command, but it's certainly better
than nothing.
-----Original Message-----
From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof via Af
Sent: Wednesday, November 26, 2014 10:29 AM
To: [email protected]
Subject: Re: [AFMUG] 450 AP still dropping to 10M Ethernet w/Mikrotik?
At which end? In the past I've had bad luck forcing the speed at the
Mikrotik end, it made things worse. I could try limiting what the AP
advertises, but risk cutting myself off.
-----Original Message-----
From: Daniel Gerlach via Af
Sent: Wednesday, November 26, 2014 8:54 AM
To: [email protected]
Subject: Re: [AFMUG] 450 AP still dropping to 10M Ethernet w/Mikrotik?
have you fix it to 100m full
2014-11-26 15:49 GMT+01:00 Ken Hohhof via Af <[email protected]>:
I thought this problem had gone away months ago with some 450 FW
upgrades, but I just realized I'm still seeing it on 3 or 4 APs
between 2
sites.
Link flaps up and down, and then drops to 10M. One site has a 493G
router, the other has a 450G. None of the sites with Mikrotik 2011 or
a Cisco
2960
have this issue, even with longer cables. Another site with a 450G is OK.
