1.14 Routing Operation Using route6d 105
deleted route entry is freed. If rrt_prev is NULL, then the first entry in the routing table
is being deleted, so riprt is also updated.
591–592 If the route entry has expired, its metric is set to infinity (metric of 16) indicating the
destination is no longer reachable.
596–599 A RIPng response message is generated for each directly connected network. The
function ripsend() is called to send the RIPng response message on each active
interface. Since the message is a regular update, the response message is sent to the
all-rip-routers multicast address.
600 The interval timer is re-armed here. The ripinterval() function provides the timer
interval based on the requirement of [RFC2080] to avoid synchronized updates ...