Clear arp table on sb5101 how?

As per title, I have a stale arp and do not know how to clear it. I only use this modem with my ps3 online, so how to clear the whole table or just that one entry, doesnt matter. My searches yeilded results such as using a script, but this is generally done from isp end. I'd like to acheive this without reflashing to clear it. Anyone have any ideas? Thank you.

I can connect any other device to the modem and it works fine, it's just the ps3. I have also connected the same ps3 to my sub line and it works fine there to. So I assume stale arp.

also running the latest hax0rware on this one, diag.