[j-nsp] arp from correct IP address

[Baldur Norddahl]

Hello

I have a problem where some customer routers refuse to reply to arp from
our juniper mx204. The arp will look like this:

11:57:46.934484 Out arp who-has 185.24.169.60 tell 185.24.168.248

The problem is that this should have been "tell 185.24.169.1" because the
client is in the 185.24.169.0/24 subnet. The interface is
"unnumbered-address lo0.1" with lo0.1 having both 185.24.168.248 and
185.24.169.1 among many others. A Linux box would select the nearest
address but apparently junos does not know how to do this.

Tried adding in "preferred-source-address $junos-preferred-source-address"
but this just results in "preferred-source-address NONE" and does nothing.
Also there is zero documentation on how junos will fill in that variable.

Is there a solution to this? Is there a radius variable I can set with the
preferred source address?

Regards,

Baldur