I am setting up a base station to service an area and I was wondering if I
could get some feedback. I am going to setup the base as a bridge and setup
the CPE to route. I am doing this so each CPE has a private IP on the
wireless side "192.168.1.x" and a different private on the LAN side
"172.16.x.x" dispensing DHCP for the client. My theory is, I am able to
manage my network and CPE equipment with my private IP and I give the client
there own private IP range so they do not step on anybody's toes and they
are free to network their house or what ever. I was wondering if this sounds
feasible or is their a better way.
wes
----- Original Message -----
From: "Thomas Giger TGC" <thomas.giger@tgc.de>
To: "'Norm Young'" <npyoung@applegatebroadband.net>; "'Karlnet Mailing
List'" <karlnet@WISPNotes.com>
Sent: Friday, August 22, 2003 12:41 PM
Subject: RE: [Karlnet] Ping time differences
> > I've been noticing some rather serious jitter between our
> > client stations and our NOC or AP. When I ping from the
> > client radio out towards the NOC or AP, I see anything
> > between 15mS-300mS.
>
> That's what I would expect from a polled system. Note that the polling
> frequency has no correlation to your ping interval; the activity of other
> systems influence how frequently this (idle) client is being permitted to
> transmit. So some echo requests wait longer than others until they allowed
> on the air.
>
> > The ping time jitter has no correlation
> > to system load, but responds well if I load the client that
> > I'm testing from. (Start a download from the NOC towards
> > the client, and the ping times drop down to 20-30mS )
>
> That is because the PINGs can now "ride on the ACK packets" of your
> download.
>
> > Pinging back from the NOC to the client, I see stable 10mS or
> > less ping times.
>
> That is maybe because the base anticipates that if a packet goes out to a
> satellite, there is likely a paket to come back - so it will poll this
> satellite in its next round.
>
> > Is it even a problem?
>
> 300 ms (your worst figure) seems to be too much unless the base has many
> satellites and there is traffic to others. If the cell is idle and there
are
> not too many satellites being polled, it may be a sign of interference and
> retransmission.
>
> The question really is whether this was less significant in earlier
versions
> and if yes, if it is a side-effect from other optimizations in the recent
> releases. I seem to remember there was something on the KN website along
> with the release that talked about increased responsiveness in paket
> forwarding vs. RTT for lightly loaded satellites.
>
> regards,
> --
> 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
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
|