Thanks Thomas. Good suggestions. Unfortunately, our symptoms do not match
either condition, and we are already blocking snmp at our edge for all our
APs.
-Ben.
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Thomas Giger TGC
> Sent: Tuesday, November 04, 2003 11:23 PM
> To: 'Karlnet Mailing List'
> Subject: RE: [Karlnet] AP-1000 loses one radio interface
>
>
> In the past, we have had 2 symptoms that need to be differentiated:
>
> 1) A radio interface completely stops sending (keeps receiving). This not
> only happened at CORs, also at the CPEs. The solution was to swap
> the card,
> as its radio TX amplifier was suffering a temporary black-out.
>
> 2) On some CORs (some of them actually running plain 802.11a AP mode with
> Lucent 3.x firmware) one or two satellites would (but not all!) would be
> lost. We were lucky enough to be able to inspect this from the CPE side in
> one case and found that, again, traffic was passing one way - i.e. ARP
> requests were coming in and OSPF multicasts, but the ARP response was not
> getting back via the COR.
>
> While issue #2 seems similar to #1, it must be different for a couple of
> reasons that we observed:
>
> ** #2 can be solved by a reboot command to the AP/COR, #1 cannot. This
> matches your description.
>
> ** In issue #2, the AP/COR looses one or two out of several CPEs. So if it
> can talk to the rest, it cannot be its radio TX amplifier.
>
> ** If the the AP/COR loses two CPEs simultaneously (sometimes it
> does!), it
> cannot be the CPE radios either.
>
> We therefore concluded this may be a scan packet arriving from the public
> internet (the management addresses of our APs/CORs are public and were
> publically reachable). We then blocked the AP/COR's IP addresses at the
> border routers and this helped immediately.
>
> So, if you can match your symptoms to issue #2 and your COR has a public
> reachable IP address, block it, I would recommend.
>
> No, unfortunately, we have not been able to trace what kind of
> packet could
> cause this partial confusion of the AP/COR. And note that neither issue #1
> nor #2 are specific to newer Karlnet versions. #1 is a pure hardware
> problem, #2 is also present in pre-4.x firmware.
>
> --
> true global communications GmbH
> Thomas Giger
> In der Au 27, 61440 Oberursel, Germany
> fon +49.6171.6381-0, fax +49.6171.6381-19
> www.tgnet.de || www.megaspeed-internet.de
>
> > -----Original Message-----
> > From: Intercom - Roberto Ravetti [mailto:rravetti@itc.com.ar]
> > Sent: Tuesday, November 04, 2003 8:15 PM
> > To: Karlnet Mailing List
> > Subject: Re: [Karlnet] AP-1000 loses one radio interface
> >
> >
> > Recenly last week I have the same problem in two AP1000 with 4.31. The
> > solution was restart.
> >
> > Roberto
> > ----- Original Message -----
> > From: "Ben Polson" <bsp@bandwave.net>
> > To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
> > Sent: Tuesday, November 04, 2003 10:01 PM
> > Subject: RE: [Karlnet] AP-1000 loses one radio interface
> >
> >
> > > Actually, yes. We've had strange, random lockups of both wireless
> > > interfaces under Karlnet 4.31 and 4.43 on one of our
> > AP-1000's. Haven't
> > > been able to trace it back to anything specific.
> > >
> > > -Ben.
> > >
> > > -----Original Message-----
> > > From: karlnet-bounces@WISPNotes.com
> > > [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Bob Hrbek
> > > Sent: Tuesday, November 04, 2003 1:56 PM
> > > To: devrenbennett@yahoo.com; Karlnet Mailing List
> > > Subject: [Karlnet] AP-1000 loses one radio interface
> > >
> > >
> > > Anybody else have AP-1000's that ocassionally lose a radio
> > interface and
> > > require a reboot to restore it?
> > >
> > > This is really getting old! grr.. (it's an orinoco COR
> > 4.15, so I'm sure
> > > there could be a problem there)
> > >
> > > -bob
> > >
> > > _______________________________________________
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> > > Karlnet@WISPNotes.com
> > > http://lists.wispnotes.com/mailman/listinfo/karlnet
> > >
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> > > Karlnet@WISPNotes.com
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> > >
> >
> >
> > _______________________________________________
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> > Karlnet@WISPNotes.com
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> >
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