We have a remote router (SRX210 in packet mode running 11.2) with a private and public IP range on the same interface:

unit 0 {
    family inet {
        filter {
            input MH-OUT-FILTER;
        }
        address 212.x.x.1/25 {
            preferred;
        }
        address 212.x.x.129/26;
        address 192.168.5.1/25;
    }
}

When I enable bootp forwarding:

forwarding-options {
    helpers {
        bootp {
            interface {
                ge-0/0/1.0 {
                    server a.b.c.d;
                }
            }
        }
    }
}

...the bootp packets arrive with an outer IP as per normal unicast routing, but a "giaddr" field of 192.168.5.1, even though I've set 212.x.x.1 as the "preferred" IP.

This causes problems, because the DHCP server can't directly reach 192.168.5.0/24 from its location.

Can I control the "giaddr" field in a forwarded bootp request on JunOS?

Cheers,
Phil
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