This is a 450G on 6.19.
The main symptom is port up/down events in the log.
If it's bad enough, the router will start showing that it is only
advertising 10M to the peer, and the status will go to 10M.
-----Original Message-----
From: George Skorup (Cyber Broadcasting)
Sent: Monday, April 06, 2015 2:39 PM
To: [email protected]
Subject: Re: [AFMUG] 10/100 vs GigE SyncInjector
I have two 10/100 SyncInjectors at two sites. One is a RB1100AHx2 still
on v5.25. The other is a RB493G on v6.21.1. I don't see any negotiation
issues or CRC/FCS errors, etc.
Also, I don't think the GigE PoE on the 450 uses all 8 wires for power,
still only 4, 5, 7 & 8 are powered.
On 4/6/2015 12:20 PM, Ken Hohhof wrote:
I've mostly gotten rid of problems with Mikrotik ports not wanting to work
at 100M when 450 APs are powered from a 10/100 Syncinjector, by changing
out the WB surge suppressors from LV to GigE. One site still seems to
have some issues, which go away if using the onboard GPS and turning off
sync over power.
So I can change out the router, Syncinjector, surge suppressor, cable or
AP. If changing out the Syncinjector, I could use another 10/100 version
or spend the extra money for the GigE version.
Has anyone done a comparison? Is there any difference between the 10/100
and GigE versions as far as sync over power making Mikrotik Ethernet ports
flap at 100M and then stop advertising 100M altogether? I'm thinking it
could be worse because the power is actually going on the data pins via
the transformers, or better because it is using all 8 wires, or maybe it
makes no difference since power is still not across twisted pairs.
I do realize I won't get more than 100 Mbps throughput unless I use the
GigE version (duh!), but that doesn't seem to be a major issue with 20 MHz
channels and 256QAM.
