“Default Route”
Original version of IPX : if path to D not known, drop packet
Then “default route” got added
Net #-2 (FF FF FF FE) means “default”
If don’t have path to D, but have path to -2, then route towards -2
- R2 announces to R1 that it can reach “-2”
- Can configure filtering rules per link, and where to advise -2