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2.22 IP route control function
IP route information is managed with routing table and used for the judgment of forwarding destination of IP
packet.
IP route information is controlled by the following functions.
▪ Function to control route by fault detection of interface
▪ Static routing function
Here, types and management method of IP route information and the function that controls the IP route
information is explained.
2.22.1 Types of IP route information
IP route information is classified by the following information.
▪ Interface route (IPv4)
The IPv4 network or IPv 4 address allocated in the interface is shown. IPv 4 address allocated
in the loop back interface is managed as a host root (32 bits network mask).
▪ Interface route (IPv6)
The IPv6 prefix allocated in the interface is shown. It is generated when IPv6 prefix is set as
structure definition and when IPv6 prefix information is received by Router Advertisement Message.
The IPv6 address allocated in the loop back interface is managed as a host root (128 bits network mask).
▪ RA route (IPv6)
The generated default route is shown which is based on the information of received Router Advertisement(RA)
Message.
▪ Static route (IPv4/IPv6)
It is set as structure definition and the route information maintained in the device is shown.
IP route information is managed by the following priority values.
●IPv4
IP route
information
Interface route
0 (Fix)
Static route
1(Change allowed)
●IPv6
IP route
information
Interface route
0 (Fix)
Static route
1(Change allowed)
RA route
12(Fix)
Priority value
Priority value
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