Netopia 2e-h-w Mode D'Emploi

How Your Cayman 2E-H-W Works

Cayman 2E-H-W User’s Guide

November 2000

expiration of an activity time or intervention by a network 
administrator, occurs.

When a peer no longer needs a link, it sends a Terminate-Request 
packet to the remote peer and closes any open NCP sessions. When 
a peer sending a Terminate-Request receives a Terminate-Ack packet 
(or after a specified number of unacknowledged Terminate-Request 
packets are sent), it signals the physical layer to disconnect to 
enforce the termination of the link.

Your Cayman 2E-H-W maintains a routing table for its IP routing 
service. The routing table identifies the networks a router can reach, 
the interface and gateway through which the router must forward a 
packet to reach its destination, and the number of routers (metric or 
hop count) through which a packet must travel to reach a remote 
network. When the router receives a packet, it consults its routing 
table to decide where to send the packet.

Routes to other networks can be entered and maintained manually 
(static routes) or acquired from other routers interactively (dynamic 
routes):

Static routes identify pathways to destination networks that are 
stable over time or to networks that must always be available, 
even if a link is not currently open. These static routes let each 
router recognize how to reach the other, even if one router 
hasn't heard from the other recently. Static routes are usually 
required for a PPP link to be established “on demand,” since, 
without it, the router does not know which interface to route a 
packet over to reach the remote network.

Dynamic routes identify pathways to destination networks that 
may change over time. Dynamic routes are created and 
configured when routers broadcast RIP (Routing Information 
Protocol) packets advertising the networks they can reach and 
the distance (number of routers) to each network.