Hi, > On 09 Dec 2016, at 14:45, Jiri Lunacek <[email protected] > <mailto:[email protected]>> wrote: > > Has anyone found a way how to cache negative ARP results in JunOS?
Nope :(. We ran into issues before at CCC Congress (Hamburg) in 2013 when using Ruckus WiFi. We ended up replacing the Juniper router for WiFi with a Linux Router which *could* do negative ARP caching. These days we’re using Aruba WiFi gear which can do ARP-proxying and doesn’t flood ARP requests for IPs it doesn’t know and answers on-behalf of the clients. > The only way of working around this I could come up with was defining discard > routes for all interface prefixes and then importing a host route for every > active address in our network. And that is a last resort I would rather not > use. You could look at AMS-IX’s ARP-sponge: https://ams-ix.net/downloads/arpsponge/ <https://ams-ix.net/downloads/arpsponge/> - not sure if that would solve your CPU issues though, but at least it wouldn’t have to ARP anymore once the table has been filled. — Arjan _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
