nanog mailing list archives
Re: iPhone and Network Disruptions ...
From: "Dale W. Carder" <dwcarder () doit wisc edu>
Date: Sun, 22 Jul 2007 14:51:21 -0500
On Jul 21, 2007, at 8:52 PM, Bill Woodcock wrote:
Cisco, Duke has now come to see the elimination of the problem, see:"*Duke Resolves iPhone, Wi-Fi Outage Problems"* at http://www.eweek.com/article2/0,1895,2161065,00.asp
when the iPhone roams onto a new 802.11 hotspot. Apple hasn't issued a fix yet, so Cisco had to do an emergency patch for some of their largerit's an ARP storm, or something similar,customers.
As I understand, Duke is using cisco wireless controllers to run their wireless network. Apparently there is some sort of interop issue whereone system was aggravating the other to cause arp floods in rfc1918 space.
We've seen 116 distinct iphones so far on our campus and have had sniffers
watching arps all week to look for any similar nonsense. However, we are running the AP's in autonomous (regular ios) mode without any magic central controller box. Dale -- Dale W. Carder - Network Engineer University of Wisconsin at Madison / WiscNet http://net.doit.wisc.edu/~dwcarder
Current thread:
- iPhone and Network Disruptions ... Prof. Robert Mathews (OSIA) (Jul 21)
- Re: iPhone and Network Disruptions ... Sean Donelan (Jul 21)
- Re: iPhone and Network Disruptions ... Bill Woodcock (Jul 21)
- Re: iPhone and Network Disruptions ... Jim Popovitch (Jul 21)
- Re: iPhone and Network Disruptions ... Christian Kuhtz (Jul 21)
- Re: iPhone and Network Disruptions ... Dale W. Carder (Jul 22)
- RE: iPhone and Network Disruptions ... Frank Bulk (Jul 24)
- RE: iPhone and Network Disruptions ... Hank Nussbacher (Jul 24)
- Re: iPhone and Network Disruptions ... Warren Kumari (Jul 24)
- Re: iPhone and Network Disruptions ... Bill Woodcock (Jul 21)
- Re: iPhone and Network Disruptions ... Sean Donelan (Jul 21)
- Re: iPhone and Network Disruptions ... Prof. Robert Mathews (OSIA) (Jul 22)
- <Possible follow-ups>
- Re: iPhone and Network Disruptions ... Prof. Robert Mathews (OSIA) (Jul 24)
- Re: iPhone and Network Disruptions ... Iljitsch van Beijnum (Jul 24)
- Re: iPhone and Network Disruptions ... Marshall Eubanks (Jul 24)
- RE: iPhone and Network Disruptions ... Frank Bulk (Jul 24)
- RE: iPhone and Network Disruptions ... Dominic J. Eidson (Jul 25)
- Re: iPhone and Network Disruptions ... Iljitsch van Beijnum (Jul 24)