D-Link DGS-3312SR Инструкция по эксплуатации онлайн [142/290] 12494

DGS-3312SR Stackable Gigabit Layer 3 Switch

9 Update Request

10 Update Response

11 Update Acknowledgement

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.

octets must

pretation

RIP was designed net mask. An extension to

version 1 doe l ed by the network is the same

as the subnet s sed to propagate classless addresses.

e messages for each IP interface to which it is connected.

ork can contain subnetted routes, other interfaces cannot. The

net mask entry, so RIP version 2 can be used to propagate variable length subnet

. RIP version 2 also adds an explicit next hop entry, which speeds convergence and

mat used with RIP2 is an extension of the RIP1 format:

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

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 Inter

to be used with classed address schemes, and does not include an explicit sub

s al ow routers to exchange subnetted addresses, but only if the subnet mask us

ma k used by the address. This means the RIP version 1 cannot be u

Routers running RIP version 1 must send different updat

Interfaces that use the same subnet mask as the router’s netw

router will then advertise only a single route to the network.

RIP Version 2 Extensions

RIP version 2 includes an explicit sub

addresses or CIDR classless addresses

helps prevent the formation of routing loops.

RIP2 Message Format

The message for

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.

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