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
>
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