Yes, that does mean you're on a 5MHz
link. The monitor will also tell you modulation rates. They're
not the same for RX and TX. And neither are the signal strengths.
You re-gained 5dB? Was there some slow-moving angular creep in
your mast setup?
--Bart
On 07/23/2014 07:44 PM, Dean Gibson AE7Q wrote:
On 2014-07-21 16:06, Dean Gibson AE7Q
wrote:
On
2014-07-21 11:26, Tom Hayward wrote:
This is a great deal for anyone who
needs a HamWAN client. Resurrecting the modem is probably a
10 minutes job, and these Poynting antennas are sold out
everywhere.
Tom KD7LXL
Thanks for the info about NetInstall, but when I hold the reset
button on the 5SHPn, it stops flashing after about 15 seconds,
which according to the documentation is the supposed
acknowledgment that it is going to search for NetInstall for a
PXE boot.
NetInstall has the PXE server enabled, but never sees the 5SHPn.
Yes, $120 is a good deal for the package.
Having not received any offers for my "great deal", I began to
wonder why the 5SHPn clearly is decoding pressing the reset button
(by its flashing pattern), but then not interrogating "NetInstall"
for the PXE boot. So, I decided to read up on PXE boot (NOT on
the MicroTik site).
I discovered that the "normal" PXE protocol starts out using DHCP,
but I was never seeing the result of a DHCP-assigned IP address
(and of course no response to access via the MAC address). So, I
decided to go look in my DHCP server logs. I saw (and expected)
DHCPDISCOVER / DHCPOFFER sequences prior to the failure, but after
the failure, I was surprised to see BOOTREQUEST / BOOTREPLY
sequences (with the appropriate IP address!) when trying to PXE
boot. BOOTREQUEST / BOOTREPLY sequences are part of the old BOOTP
protocol (before DHCP was invented).
According to Wikipedia, PXE normally uses DHCP, but the 5SHPn
is using the old BOOTP protocol for PXE. Since DHCP servers
normally respond (for compatibility purposes) to BOOTP requests as
well as DHCP requests, it appeared that my DHCP server was
responding to the 5SHPn before the MikroTik "NetInstall" could,
and since the former was not configured to send the 5SHPn a boot
file, nothing happened.
So, I temporarily disabled my DHCP servers, and voila! NetInstall
laboriously (meaning very slowly) installed a new copy of the
firmware. I did my usual reconfiguration script, and I was up and
running, albeit with the 8dB loss.
The first two instances of the 8dB drop were rather sudden, but
the latest drop occurred over a period of about two weeks, which
made me suspect vegetation growth as well as a problem with the
5SHP. So, I decided to engage in another antenna aiming session,
and that seems to have recovered about 5dB of the drop.
Bart: "/interface wireless monitor 0"
shows "band: 5ghz-n-5mhz". I
presume that means I'm using a 5MHz link?
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