Maybe others have the power to keep this in mind but a network diagram
would certainly help.

>From what I'm gathering the issue isn't a MT backhaul but rather
things at a site going up/down in weird patterns.  My first guess
would be bad switch.

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373

“Success is not final, failure is not fatal: it is the courage to
continue that counts.”
--- Winston Churchill



On Wed, Mar 31, 2010 at 1:06 PM, Forbes Mercy
<[email protected]> wrote:
> We have been plagued with an ongoing issue in our Mikrotik backhauls.
> It happens about once a month and only on three radios that feed each
> other, all other sites work fine.  Site A is my head end, it is a
> Mikrotik 433 with an XR5 chip that feeds about five miles to another
> site to Site B.  Site B has the same equipment that goes through a
> managed switch then passes on to Site C about 7 miles further.
>
> What happens is we are suddenly paged that all three are down.
> Sometimes Site A stays up, most times not, we can get into Site A since
> it's the head end and we reboot it, it comes right back up.  Site B and
> C stay down, we have to drive to Site B and reboot it, it comes back up
> but Site C stays down.  We have a remote reboot for it from a redundant
> feed so after rebooting it C reconnects to B and they are all up.  This
> will happen three or four more times in a single day or not at all again
> for a month, it's totally unpredictable. The boards are up but not
> communicating, it also takes down the other 2.4 Mikortik AP's at Site B
> and that has to be rebooted.  We normally run arp -d to clear up any
> residual, it sure appears to be traffic related and we are on a bridged
> not routed network.
>
> The only similarities is it's only this feed, it usually happens in
> spurts of a day or two then stops for a long time, it always happens
> during the working day leading me to believe it's coming from a day
> user.  We run Wireshark but see nothing, we torch the towers and they
> don't show much unusual.  We're thinking it might be a deluge of traffic
> between Site B and C and are thinking of putting a PC at the C tower to
> run diagnostics there.  This is very manpower heavy as we have to send
> people two places and average down time is one hour to do this.  We are
> going to turn our network into a routed network this Summer but that
> doesn't help now.  Any ideas would be appreciated.
>
> Forbes
>
>
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