Help with reading strace

[Bob Chiodini]

On Wed, 2006-03-22 at 15:33 +0000, Dan Track wrote:
> On 3/22/06, Andy Green <andy at warmcat.com> wrote:
> > Dan Track wrote:
> > > On 3/22/06, Andy Green <andy at warmcat.com> wrote:
> >
> > > This firewall box is a cisco pix firewall. I can route the box's
> > > without the firewall. What's the next step if, shall I ping again now
> > > that they aren't using the firewall, or is there another test?
> >
> > LOL I don't know if there's another test :-)  I'm just making this up.
> > Hook them up without the PIX and see if packets are still munched with
> > the floodping.  Maybe the problem is only that neptune really does issue
> > pings too fast for opal to keep up with it and this is a total
> > sideissue.  (What is the relative speed of CPU of the two servers?)  If
> > it acts differently with the PIX gone that might be interesting though.
> >
> > -Andy
> >
> Hi Andy,
> 
> Weirdest problem I've ever seen. Can;t make head or tail of it.
> Now that they ignore the firewall I stil get the same result:
> 
> server A (neptune)-switch-server B(opal)
> 
> If I ping from neptune to opal I get dots appearing on the "ping -f"
> command. If I ping from opal to neptune I never get any dots appear.
> 
> Which setting do I take seriously:
> 
> ethtool:
>  ethtool eth2
> Settings for eth2:
>         Supported ports: [ MII ]
>         Supported link modes:   10baseT/Half 10baseT/Full
>                                 100baseT/Half 100baseT/Full
>                                 1000baseT/Half 1000baseT/Full
>         Supports auto-negotiation: Yes
>         Advertised link modes:  10baseT/Half 10baseT/Full
>                                 100baseT/Half 100baseT/Full
>                                 1000baseT/Half 1000baseT/Full
>         Advertised auto-negotiation: Yes
>         Speed: 100Mb/s
>         Duplex: Half
>         Port: Twisted Pair
>         PHYAD: 1
>         Transceiver: internal
>         Auto-negotiation: on
>         Supports Wake-on: g
>         Wake-on: d
>         Current message level: 0x000000ff (255)
>         Link detected: yes
> 
> 
> or mii-tool:
> mii-tool eth2
> eth2: no autonegotiation, 100baseTx-HD, link ok
> 
> 
> ethtool says HD the other says FD, which ones right.
> 
> When copying files to and from it I get around 9Mb/s, which seems good
> for me, what do you think?
> 
> Thanks
> Dan
> 

Dan,

Duplex: Half, bad (probably).  Force it to full:

ethtool -s eth0 duplex full

Also when you stop the ping -f how many pings are lost?

Bob...