1.2.4 Routing Function

Routing information is the function to control the destination to send the communication packets based on the route information. There are two types of functions. One of which is statistic routing for configuring the route information in advance, and the other is dynamic routing for dynamically updating the route information.

NS appliances provide the following routing functions:

Table 1.3 Routing Functions Provided by NS Appliance
Functions		Remarks
Static routing
Dynamic routing	RIPv1	The version of RIP to use can be specified. Triggered update or split horizon are always valid. Differences between RIPv1 and RIPv2 RIPv1 is a prerequisite for using the same subnet mask in the same network address. Sends RIP messages using IP broadcast addresses. More than two types of subnet masks can be used for RIPv2. Use the IP multicast address (224.0.0.9) in order to send RIP messages. Variable Length Subnet Mask (VLSM) and Classless Inter-Domain Routing (CIDR) are supported. When using NS appliances, the following functions are not supported. Unicast RIP (limited to adjacent routers) Silent RIP (RIP, not published) Metric value manipulation RIPv2 authentication
Dynamic routing	RIPv2