Re: ARP errors on IBM i

Found this in the v7.1 Memo to users:

Systems are no longer being shipped with 10/100 cards capable of pure SNA.
The only ethernet standard that the new gigabit cards support is *ETHV2.
Switching to the *ETHV2 ethernet standard avoids some fairly uncommon but
serious issues that are encountered because of network equipment not acting
appropriately to *IEEE8023 negotiations.

Charles

On Fri, Jan 27, 2017 at 10:59 AM, Mike Cunningham <mike.cunningham@xxxxxxx>
wrote:

Our network admins approached us because they are getting flooded with ARP
errors at their Cisco switch that is originating from our IBM i NIC. Error
is "ARP-3-INVAL_HDR_HRD_TYPE".
Doing some research on this I found this one post "Great post, found same
problem on iSeries (AS400). Default ethernet setup sends 802.3-SNAP and
Ethernet 2 arp frames. Need to delete and recreate ethernet line, setting
"ETHSTD(*ETHV2)" to only use Ethernet Version 2."
Looking at the Line Description and the ETHSTD() parameter it has values
for *ETHV2 and *IEEE8023 and *ALL. Ours are setup to *ALL which I assume is
the default since I don't remember ever touching this parameter before.
Question I have is has anyone else done this and did it cause other
issues? Do I really need to delete the line and re-add it to change this
parameter? I do not see it as a value I can change with I use CHGLINETH. We
have three active lines and all are set to *ALL. Just means needing to take
down communications during off hours if this does require the deletion of
the line description to change it.

Thanks

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