Fw: em devices not sending proper arp packets ...

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Fw: em devices not sending proper arp packets ...

Colin Farley

I forgot to add this isn't specific to the em driver, as I use the lnc.
Also, it's not a problem all the time, only sometimes the boxes fail to
send out Gratuitous ARP packets.  I have verified by capturing packets and
trying to readd an alias a short period after the failure.

Colin
----- Forwarded by Colin Farley/COMPUBank on 11/14/2005 02:54 PM -----
                                                                           
             Colin                                                        
             Farley/COMPUBank                                              
                                                                        To
             11/14/2005 02:51          David Kirchner <[hidden email]>        
             PM                                                         cc
                                       [hidden email], "Marc  
                                       G. Fournier" <[hidden email]>      
                                                                   Subject
                                       Re: em devices not sending proper  
                                       arp packets ...(Document link:      
                                       Colin Farley)                      
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           



I have this same problem on some production servers running
4.10-RELEASE-p16.  My work around is to set the arp cache timeout on our
2811 router to 10 seconds.

Colin



                                                                           
             David Kirchner                                                
             <[hidden email]>                                                
             Sent by:                                                   To
             owner-freebsd-sta         "Marc G. Fournier"                  
             [hidden email]           <[hidden email]>                  
                                                                        cc
                                       [hidden email]          
             11/14/2005 02:40                                      Subject
             PM                        Re: em devices not sending proper  
                                       arp packets ...                    
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




On 11/14/05, David Kirchner <[hidden email]> wrote:
> We've had this problem too. Some have suggested turning on "portfast"
> on the Cisco switches, but that doesn't resolve it. It causes severely
> long delays when doing net installs (sysinstall has a very long retry
> time for DNS lookups, measured in minutes). Ultimately the problem is
> that the driver changed some time in the 4 branch (we think it was
> between 4.1 and 4.2 or 4.2 and 4.3)

Sorry to reply to myself here, I forgot to add: The problem is still
present in 6.0-RELEASE, and can be seen while running sysinstall.
Haven't tried 6.0-STABLE (can't get -RELEASE to install due to
unrelated bug bin/88872). According to cvsweb, 6.0-RELEASE has the
latest Intel driver.

Also: The bug you're seeing may be unrelated to the bug I was seeing,
but I suspect they may be similar. Arps just don't seem to be going
out like they should
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