How do Frame-Relay Keepalives affect routing tables when using
static routes that point to a Next-Hop-Address versus using static
routes that point to the local serial (sub)interface ? I know that if
you point to the local interface versus a next-hop-address and the
frame link causes a change in the serial interface's status that the
routes are dropped from the routing table much quicker than they
would be dropped from the routing table if the static route pointed
to the next-hop-address. Please advise.