D-Link DES-3326 User Manual page 140

24-port NWay Ethernet Switch User's Guide
Figure 5-21. Rip Message Format
RIP 2 also attaches a 16-bit Route Tag to each entry. A router
must send the same tag it receives when it transmits the route.
Thus, the tag provides a way to propagate additional information
such as the origin of the route. In particular, if RIP2 learns a
route from another autonomous system, it can use the Route Tag
to propagate the autonomous system' s number.
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. Before processing
an incoming message, RIP software examines the version number.
124 Switch Management and Operating Concepts