[c-nsp] Cisco 7201 sending unintended gratitious arps

[Mark Tinka]

On 28/Jul/15 17:07, Mike wrote:
>
> Hi,
>
>     I have a 7201 which is terminating pppoe sessions, amoung other
> jobs. For some reason, on an interface completely unrelated (gi0/0.4),
> the router appears to be sending gratuitous arps every time it sets up
> a new session, like so:
>
>  xx:xx:xx:xx:xx:xx > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length
> 60: Ethernet (len 6), IPv4 (len 4), Reply y.y.y.y is-at
> xx:xx:xx:xx:xx:xx, length 46
>
>     I believe these are showing up on other interfaces as well. I
> don't understand why it would be sending these, and especially, why
> would it be sending them out interfaces not related or having subnet
> addresses anywhere near the same range? The above example interface
> gi0/0.4 is in 10.0.1.32/27 while the arp above would be for my public
> ip block in the 216.x.x.x range.
>
>     The router runs 12.2(33)-SRE7 if it makes a difference. Anyone
> know how I can turn it off?

no ip gratuitous-arps

Mark.