Subject: Re: net stats.
To: None <email@example.com>
From: Feico Dillema <firstname.lastname@example.org>
Date: 10/18/1999 15:29:23
On Fri, Oct 15, 1999 at 05:28:15AM +0900, email@example.com wrote:
> >>>In the netstat outpur below, the Ibytes and Obytes for both address
> >>>families are the same. Is this a bug, something not yet implemented
> >>>or do I miss some option in my kernel to get it to discriminate
> >>>between address families?
> >> I believe there's no code for per-AF, per-IF stats. Ibytes and Obytes
> >> are purely per-if stats (not per-AF).
> > I was wrong. NetBSD has struct ifaddr_data (sys/net/if.h) which does
> > per-ifaddr stats. I'll be adding some support for this.
> Sorry again, I was right. per-ifaddr stats are never used
> (IFA_STATS never defined). code fragment in ip_output() will panic
> the kernel as it chases dangling pointer.
Is it possible that the per-if netstats count the number of bytes
twice (maybe for both IP and IPv6)? On my machines it looks like
the ibytes and obytes are a factor 2 too high. My reference is
stats collected from a cisco router. The NetBSD machines and the
cisco seem to agree on the number of packets though.