D-Link DES-3326 User Manual - Rip 1 Message
DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts
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9
Update Request
10
Update Response
11
Update Acknowledgement
Table 5-12. RIP Command Codes
The field VERSION contains the protocol version number (1 in this
case), and is used by the receiver to verify which version of RIP the
packet was sent from.
RIP 1 Message
RIP is not limited to TCP/IP. Its address format can support up to
14 octets (when using IP, the remaining 10 octets must be zeros).
Other network protocol suites can be specified in the Family of
Source Network field (IP has a value of 2). This will determine
how the address field is interpreted.
RIP specifies that the IP address 0.0.0.0 denotes a default route.
The distances, measured in router hops are entered in the Distance
to Source Network, and Distance to Destination Network fields.
RIP 1 Route Interpretation
RIP was designed to be used with classed address schemes, and
does not include an explicit subnet mask. An extension to version
1 does allow routers to exchange subnetted addresses, but only if
the subnet mask used by the network is the same as the subnet
mask used by the address. This means the RIP version 1 cannot be
used to propagate classless addresses.
Routers running RIP version 1 must send different update
messages for each IP interface to which it is connected. Interfaces