Rip 1 Message; Rip 1 Route Interpretation; Rip Version 2 Extensions; Rip2 Message Format - D-Link DGS-3324SR User Manual

D-Link DGS-3324SR Layer 3 Stackable Gigabit Ethernet Switch
Command
1
2
3
4
5
9
10
11
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.
Routers running RIP version 1 must send different update messages for each IP interface to which it is
connected. Interfaces that use the same subnet mask as the router's network can contain subnetted routes, other
interfaces cannot. The router will then advertise only a single route to the network.

RIP Version 2 Extensions

RIP version 2 includes an explicit subnet mask entry, so RIP version 2 can be used to propagate variable length
subnet addresses or CIDR classless addresses. RIP version 2 also adds an explicit next hop entry, which speeds
convergence and helps prevent the formation of routing loops.

RIP2 Message Format

The message format used with RIP2 is an extension of the RIP1 format:
Meaning
Request for partial or full routing information
Response containing network-distance 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
Table 4- 7. RIP Command Codes
96