I've monitored the status of the arp table using
"arp -n"
and
"cat /proc/net/arp"
at the same time (for a long time, every 1 second).
The strange thing that I have found is that sometimes, in the "arp -n",
the publishing entry (P flag) is missing, while in the "cat
/proc/net/arp" it is always present.
I have no idea why it happens, but I suppose (and hope :)) that if the
entry is present in the "cat /proc/net/arp" output then the arp proxy
behavious is ok.
Is it right?
Antonio
Arkadiusz Binder wrote:
and what shows
#ip ro sh cache
?
It might be that you have not arp of some host who respond for icmp and arp's in case of some recieved icmp redirect packet.
-----Original Message-----
From: "gypsy"<gypsy@xxxxxxxxxx>
Sent: 05-05-18 05:27:02
To: "Antonio Pinizzotto"<antonio.pinizzotto@xxxxxxxxxx>
Cc: "lartc@xxxxxxxxxxxxxxx"<lartc@xxxxxxxxxxxxxxx>
Subject: Re: problem with the "arp" command (using the pub flag)
Antonio Pinizzotto wrote:
> ___PROBLEM___
>
> The problems is that, sometimes, the second line (the one with the P
> Flag in the "arp -n" output) desappears for some time and then appears
> again... !!?
>
> Note.
> Do you know if it is normal or if it could be a bug in "arp"?
> I didn't verify if, when the second line is not present, the host A
> continues to answer to ARP Request for 192.168.30.130 on eth0.
> In other words I didn't verify if it's just a problem in the output (of
> "arp -n" command) and not in the behaviour.
>
> Antonio
You got Trouble, Antonio!
I've been running for 2+ months with no "disappearing" PUB arps. arp -n
works flawlessly.
Wondering: Could it be a bad NIC or cable?
--
gypsy
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