HP 200 Series Services And Applications page 117

IP Routing Table
The IP routing table contains an entry for each subnetwork that the router
has learned about. For each destination subnetwork entry, the table also
contains the following information:
Metric: the cost, typically in terms of "hop count", to the destination
subnetwork from this router. A hop count of "n" indicates that n
routers separate this router and the destination subnetwork.
Next Hop: If the destination subnetwork is directly connected to this
router, then the next hop is the IP address of this router's interface to
the destination subnetwork. If the destination subnetwork is a
remote subnetwork, the next hop is the IP address of the inbound
interface of the next router along the path to the destination.
Route Type specifies whether the route is remote or directly
connected. Also, if the router is notified that a learned route is no
longer available, then the route is marked invalid. The route will
remain in the table until the router is notified of a valid route or is
rebooted.
Route Learned indicates whether the route was statically learned
(that is, the route was specifically configured) or learned dynami-
cally through one of the routing protocols (RIP, OSPF, or EGP).
Age indicates the number of seconds since the route was learned.
Interface: a number, assigned by the router, indicating the port
through which the next hop is reached.
For more information on the IP routing table, refer to the reference manual
for the HP routers.
Note that while the IP protocol uses the information in the routing table to
determine where to deliver each packet, the IP protocol does not gather the
information to create and maintain the routing table. That function is
performed by one or more of the dynamic routing protocols: RIP, OSPF, or
EGP. Alternatively, routes can be statically configured.
Internet Protocol Routing Service
IP Routing Decisions
2-65