Packet Loss on FW1 but not FW2 (CARP + PF on FBSD8)

[Pyun YongHyeon]

On Fri, May 14, 2010 at 05:27:25PM -0400, list at cykotix.com wrote:
> Quoting Pyun YongHyeon <pyunyh at gmail.com>:
> >>>Show me the output of "sysctl dev.vr.0.stats=1" and "netstat -ndI vr0".
> >>
> >>soekris1# sysctl dev.vr.0.stats=1
> >>dev.vr.0.stats: -1 -> -1
> >>
> >
> >Please check the output of console. It would have printed some MAC
> >counters maintained in driver.
> 
> >>soekris1# netstat -ndI vr0
> >>Name    Mtu Network       Address              Ipkts Ierrs    Opkts
> >>Oerrs  Coll Drop
> >>vr0    1500 <Link#1>      00:00:24:cc:cb:94    17491     0    14993
> >> 0     0    0
> >>vr0    1500 98.xxx.xxx.56 98.xxx.xxx.59          992     -     9374
> >> -     -    -
> >>
> 
> FW1:
> vr0 statistics:
> Outbound good frames : 14992
> Inbound good frames : 17486
> Outbound errors : 0
> Inbound errors : 0
> Inbound no buffers : 0
> Inbound no mbuf clusters: 0
> Inbound FIFO overflows : 0
> Inbound CRC errors : 0
> Inbound frame alignment errors : 0
> Inbound giant frames : 0
> Inbound runt frames : 0
> Outbound aborted with excessive collisions : 0
> Outbound collisions : 0
> Outbound late collisions : 0
> Outbound underrun : 0
> PCI bus errors : 0
> driver restarted due to Rx/Tx shutdown failure : 0
> 

I thought it could be a bug in vr(4) but it seems vr(4) had zero
dropped packets. Let pf(4) log dropped packet with pflog(4) and see
why pf(4) dropped packets.

> 
> >No Ierrs, so MAC counters would be more helpful here.
> 
> >>soekris2# sysctl dev.vr.0.stats=1
> >>dev.vr.0.stats: -1 -> -1
> >>
> >>soekris2# netstat -ndI vr0
> >>Name    Mtu Network       Address              Ipkts Ierrs    Opkts
> >>Oerrs  Coll Drop
> >>vr0    1500 <Link#1>      00:00:24:ca:40:60   575909     0   588703
> >> 0     0    0
> >>vr0    1500 98.xxx.xxx.56 98.xxx.xxx.60        10029     -    53106
> >> -     -    -
> 
> FW2:
> vr0 statistics:
> Outbound good frames : 588054
> Inbound good frames : 575353
> Outbound errors : 0
> Inbound errors : 0
> Inbound no buffers : 0
> Inbound no mbuf clusters: 0
> Inbound FIFO overflows : 0
> Inbound CRC errors : 0
> Inbound frame alignment errors : 0
> Inbound giant frames : 0
> Inbound runt frames : 0
> Outbound aborted with excessive collisions : 0
> Outbound collisions : 0
> Outbound late collisions : 0
> Outbound underrun : 0
> PCI bus errors : 0
> driver restarted due to Rx/Tx shutdown failure : 0
> 
> Patrick