Switches, Hubs, and Modems
cancel
Showing results for 
Search instead for 
Did you mean: 

Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

Neil_77
Frequent Advisor

Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

I have received some error events on all the HP Procurve 4000/8000 switches on the LAN which read:

"ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z"

where w.x.y.z is the IP address of the switch itself.

Now, I understand that this message means the ARP packet is being dropped because the target IP address is invalid. All well and good.

But, can anyone give any pointers as to WHY this should be happening on the network?

(My main reason for concern is that I saw a number of similar messages during the "broadcast storm" that I posted about recently so now that I have seen these messages appearing again, I want to determine the cause, in case it leads to a similar chain of events!)

Any help would be appreciated.

Thanks.
6 REPLIES
Les Ligetfalvy
Esteemed Contributor

Re: Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

Yes, normally 0.0.0.0 is used for bootp or DHCP. Is your switch a routing switch and deploying the DHCP helper?
Neil_77
Frequent Advisor

Re: Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

No, the switches these errors appeared on aren't doing any routing - they do connect to some Cisco routers which ARE running IP Helper config though. However, there are no errors reported on the routers.
Les Ligetfalvy
Esteemed Contributor

Re: Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

Did you disable DHCP Relay agent then on those switches? I think HP enables it by default.

config
no dhcp-relay
write mem
show config
Neil_77
Frequent Advisor

Re: Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

Hi Les,

don't think these 4000/8000M switches have any features like DHCP Relay available - they are just bog standard, no frills, Layer 2 switches. (Certainly, in the way we have them configured on our network, at least!)

What I'm still a little confused about is what the original error message is actually meaning? Is it saying that the switch is trying to boot over the network, and since it doesn't have a bootp server configured, it sends the request to 0.0.0.0? (All the IP config on these switches has been configured manually)

If so, then why should it be doing this?
Andrew_291
Frequent Advisor

Re: Error event - ip: Invalid ARP Target: 0.0.0.0 on w.x.y.z

I have the same message on my 8000m when damaged netagent in Powerware UPS was plugged in switch . When I unplug them - none of that messages was issued.