DELL S6000-ON User Manual

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Routing Information Protocol (RIP)
Routing information protocol (RIP) is supported on Dell Networking OS.
RIP is based on a distance-vector algorithm; it tracks distances or hop counts to nearby routers when 
establishing network connections.
RIP protocol standards are listed in the 
 chapter.
 
Protocol Overview
RIP is the oldest interior gateway protocol.
There are two versions of RIP: RIP version 1 (RIPv1) and RIP version 2 (RIPv2). These versions are 
documented in RFCs 1058 and 2453.
RIPv1
RIPv1 learns where nodes in a network are located by automatically constructing a routing data table.
The routing table is established after RIP sends out one or more broadcast signals to all adjacent nodes in 
a network. Hop counts of these signals are tracked and entered into the routing table, which defines 
where nodes in the network are located.
The information that is used to update the routing table is sent as either a request or response message. 
In RIPv1, automatic updates to the routing table are performed as either one-time requests or periodic 
responses (every 30 seconds). RIP transports its responses or requests by means of user datagram 
protocol (UDP) over port 520.
RIP must receive regular routing updates to maintain a correct routing table. Response messages 
containing a router’s full routing table are transmitted every 30 seconds. If a router does not send an 
update within a certain amount of time, the hop count to that route is changed to unreachable (a route 
hop metric of 16 hops). Another timer sets the amount of time before the unreachable routes are 
removed from the routing table.
This first RIP version does not support variable length subnet mask (VLSM) or classless inter-domain 
routing (CIDR) and is not widely used.
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Routing Information Protocol (RIP)