[c-nsp] Cisco ASR1K ISG - ARP broadcast

[Mihai Tanasescu]

Hi all,

I come with a newbie but hopefully interesting question to you guys and 
maybe there's a different solution than completely replacing the 
hardware in question.
I have an ASR1K which functions as an ISG and which terminates the 
Layer-2 path from customers.
It has DHCP relay configured and forwards to an external (Linux) DHCP 
server.
The problem I have experienced lately consists in the classic effect of 
a ping sweep on the whole subnet assigned on the ISG interface.
It triggers a "storm" of "arp who has <ip> tell <ip ISG> " messages that 
I would like to limit/not see being emitted by the ISG.
I saw that this is quite possible on the ASR9k and that arp can be 
disabled there relying solely on the existing session information but I 
wonder if something similar is possible on the ASR1K ..or a workaround 
that would fulfill the same purpose? (ISG not sending ARP "who has" for 
IPs that have no active session with it)

Anyone have any ideas I might have missed?
 From what I have been reading in the docs I reached a dead-end with 
this platform:(

Regards,
Mihai