?when does marginal performance become unacceptable

Unanswered Question
Jan 31st, 2008

Dear all,

I have an issue with a desktop supplier:

The desktop's integral wifi b/g adapter routinely drops about four out a 1000 1000-byte pings from the next-hop gateway through an ap1130 a/g. (for the record, plenty of bandwidth, resources, no problem seen with 3rd party WiFi adapters, usw)

I think this sucks and that he should fix it. He thinks differently.

Can anyone suggest an acceptable threshold for this?


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owillins Wed, 02/06/2008 - 12:20

Could you please give brief discussion about your topology and features detail.

steve.dutky Thu, 02/07/2008 - 14:26

This has a simple sandbox topology:

1130 A/G ap with autonomous IOS trunked at 100/full to a 3550 l3 switchport

I have configured the ap with 3 ssid's, all open authentication, one guest-mode, the other two with 128 bit wep keys.

Each ssid has a corresponding svi/vlan on the switch as a next hop.

The integral adapter drops about 4 in 1000 on the G channel no matter to which ssid it connects.

Please note I don't see any packet drops using other wifi adapters on either A or G frequencies.

Again I'm looking for a rule of thumb. Can you live with losing 4 packets out of a thousand? If yes, how about 1 out of a hundred? If no, how about 4 out of ten thousand?


mike@phobostech... Mon, 02/11/2008 - 14:31

4 packets out of a thousdand seems acceptable to me. That's a failure rate of less than half a percent.


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