# This is a working example of ppp.linkup.span-isp that uses ppp connections
# to the same machine through 3 null-modem serial cables.

# The ISP links start our MP version of ppp as they come up
isp1:
  !bg ppp -background vpn1 vpn

isp2:
  !bg ppp -background vpn2 vpn

isp3:
  !bg ppp -background vpn3 vpn

vpn:
  set server /var/run/ppp/vpn "" 0177