D-Link DES-3326SRM Product Manual - Page 218
RIP 1 Message, RIP 1 Route Interpretation, Reserved for Sun Microsystem's
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D-Link DES-3326S Layer 3 Switch The COMMAND field specifies an operation according the following table: RIP Command Codes Command 1 2 3 4 5 9 10 11 Meaning Request for partial or full routing information Response containing networkdistance pairs from sender's routing table Turn on trace mode (obsolete) Turn off trace mode (obsolete) Reserved for Sun Microsystem's internal use Update Request Update Response Update Acknowledgement 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. 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. 208