Packet loss problem

[Colin Watson]

I don't believe so. We pay for a leased connection - so it's not supposed to
be filtered. I'll have a dig around tho. One other question, is their any
way to statically map an IP to a MAC (user who keeps chainging their IP when
they shouldn't), but prevent them associating the MAC with any other IP? .Or
am I gonna have to dig thru some ipfw rules ?

Thanks

Colin
----- Original Message -----
From: "Bruce M Simpson" <bms at spc.org>
To: "Colin Watson" <sb.mailinglist at lambdabroadband.com>
Cc: <freebsd-net at freebsd.org>
Sent: Saturday, September 06, 2003 10:25 PM
Subject: Re: Packet loss problem


> On Sat, Sep 06, 2003 at 06:39:12PM +0100, Colin Watson wrote:
> >   / 33104 broadcast/multicast datagrams dropped due to no socket " which
seems an inordinatly high amount. There are no drops due to full socket
buffers, although I have recompiled the kernel with nmbclusters=8192 and
Maxusers=1024 (to increase number of available sockets - kern.ipc.maxsockets
to 9391), still the loss occurs. Any suggestions, and could someone
explicitly explain what "broadcast/multicast datagrams dropped due to no
socket"  means.
>
> As Pete points out this unusually high 'no socket' figure could be due to
> packets being received for a service you don't run. Beefing up the
> number of PCBs you can have won't have any effect there if that is the
case.
>
> Also it could be due to a socket application not binding to INADDR_ANY to
> pick up undirected broadcasts (they don't get delivered to interface bound
> ports). Of course this is probably not likely to affect your application
> if you're explicitly unicasting traffic. But if you intend to receive
> multicasts this could be the case.
>
> Are you filtering anything, or could your upstream be filtering anything?
>
> BMS
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