Rip 1 Route Interpretation; Rip Version 2 Extensions; Rip2 Message Format - D-Link DES-3326SR Manual

D-Link DES-3326SR Layer 3 Switch
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:
RIP version 2 also adds a 16-bit route tag that is retained and sent with router updates. It can be used to identify the origin of
the route.
Because the version number in RIP2 occupies the same octet as in RIP1, both versions of the protocols can be used on a
given router simultaneously without interference.
208