Ran into the same bug. $junos-preffered-source-address for an unnumbered for BNG functions does NOT return the "closest/must suitable address" based on the IP+Subnet that was given the subscriber... contrary to the BNG template doucmentation. It just defaults the actual loopback of the router. (the dynamic template that gets created against a demux0.xxxx subscriber says $preffered of "NONE")
This means that things like Subscriber "ARP liveliness detection" doesn't work/cant work. (since the subscriber won't arp-respond to an ARP requests where the source isn't in the local subnet) I've had a JTAC case open on this for 8 months. Sent full configs, built a full lab for them (so they could trigger it remotely), self full PCAPs. MX204 + JunOS 18.3Rxxxx + BNG (DHCP/IPoE naturally) Also on MX80 w/same code - so it's the BNG code, not the platform doing it. - Ck. > On 25 Jan 2020, at 10:27 pm, Baldur Norddahl <bal...@gigabit.dk> wrote: > > 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 > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
