most of my AP's either route or are just dumb bridges. I don't think they
are powerful enough to handle the NAT.
----- Original Message -----
From: "Steve Deaton" <steve@texasbb.com>
To: "'Norm Young'" <npyoung@applegatebroadband.net>; "'Karlnet Mailing
List'" <karlnet@WISPNotes.com>
Sent: Wednesday, September 10, 2003 2:20 PM
Subject: RE: [Karlnet] Strange ping loss
> For whatever it's worth, I just found a NAT problem. This will only
> apply if you're running NAT on the device that is locking up. Some
> clients behind the NAT AP were running something that was generating a
> large number of NAT connections. I wasn't able to see this until I
> bridged the AP to a Cisco router. I looked at the number of NAT
> translations and there were tens of thousands. The AP running NAT was
> not able to keep up with the large number of NAT translations so it
> locked. When bridged, my 7206 would run at 98% CPU utilization. I shut
> off the MAC addresses that were generating the most connections and all
> was well. An alternate solution is to give everyone a public, thus
> negating the NAT and all is well now too. This maybe something that
> everyone already knows, but it was a simple thing that I overlooked, so
> maybe others have also. Hope this helps.
>
> Steve Deaton
> IT Director
> Texas Broadband, Inc.
> (888)868.3835 ext 85 (office)
> 979.289.0148 (office)
> 979.289.5117 (fax)
>
>
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com] On Behalf Of Norm Young
> Sent: Wednesday, September 10, 2003 10:25 AM
> To: Karlnet Mailing List
> Subject: Re: [Karlnet] Strange ping loss
>
> Hi Bob,
>
> I think that I may be seeing the same thing. I noticed that sometime
> this
> summer as I added clients to our WIPOP the jitter from the clients to
> the
> AP/NOC really went bad (as previously mentioned) AND I'm seeing timeouts
> on
> my SNMP traffic grapher occasionally, and if I do a ping from the
> clients to
> the NOC. I'm going to try and replace the AP1000 (relegating it to
> backhaul) with a WPG01 (and cross my fingers and hope I don't have
> lockup
> problems), while splitting the clients across two radios/antennas and
> see
> what that does. The amount of loading (according to what Karlnet
> states is
> possible) on this base is moderate, say 20 clients! I've already tried
> updating firmware, trying new radios at the base, all without any
> change.
>
> Norm
>
> ----- Original Message -----
> From: "Bob Hrbek" <bhrbek@jagwireless.net>
> To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
> Sent: Wednesday, September 10, 2003 6:43 AM
> Subject: [Karlnet] Strange ping loss
>
>
> > I have an Orinoco COR v4.15 with about 14 RG-1000 clients and 1
> AP-1000
> that
> > is serving as a POP and backhaul for the small pop. In all, about 35
> > clients are going through this AP, in on way or another.
> >
> > I have a monitoring system that pings all the clients every 2 minutes.
> > (Because of this problem, I stuck a monitoring box at the bottom of
> this
> > tower) It keeps reporting the clients as un-reachable. I've not
> contacted
> > any of them but had one complaint off the remote AP-1000
> Satellite/Base.
> >
> > My testing:
> >
> > I did a 1000 byte ping to one client. I left it running all night.
> >
> > --- 10.100.105.16 ping statistics ---
> > 43477 packets transmitted, 43474 received, 0% loss, time 43582095ms
> > rtt min/avg/max/mdev = 9.543/15.222/311.773/11.513 ms
> >
> >
> > Out of 43477, I lost 3 packets!!!!! My max ping time was 311ms. The
> client
> > I was pinging was the only one that I never received an outage
> notification
> > on last night. Previously I was getting 20 or more per day.
> >
> > The stats on the AP don't look wonderful. Re-transmits are about 10%
> for
> > the clients that I get the most outages reports on. Overall in FCS
> errors
> > are only .3% (yes that is point 3%) of the total inbound packets. I
> believe
> > I have some RF issues at this site but WHY, if I ping a client
> constantly,
> > will I be successful 43,374 times out of 43,477 and still drop so many
> > monitoring pings when I'm not constantly pinging him? I even disabled
> > polling on this ap and it didn't change anything but lower the ping
> times.
> >
> > If I didn't know better, I'd say I had a duplicate IP address but it
> is
> > affecting about 10 of the RG"s on a regular basis. No dupes out
> there. I
> > checked.
> >
> > Any thoughts?
> >
> > -Bob
> >
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> >
>
>
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
>
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
>
|