[j-nsp] Arp publish on dynamic arp

[Phil Shafer]

Richard A Steenbergen writes:
>So, I was playing with the arp "publish" option under "family inet address
>x.x.x.x arp" when I noticed an odd behavior. The CLI seems to let you
>configure an arp "publish" without specifying an actual static mac
>address

[Sorry for the slow reply]

JUNOS doesn't publish dynamic arp entries, so this is a missing
config constraint.  This is now PR 69586.

Thanks,
 Phil