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RIP versions
There are two RIP versions, RIPv1 and RIPv2.
RIPv1 is a classful routing protocol. It advertises messages only through broadcast. RIPv1
messages do not carry mask information, so RIPv1 can only recognize natural networks such as
Class A, B, and C. For this reason, RIPv1 does not support discontiguous subnets.
RIPv2 is a classless routing protocol. It has the following advantages over RIPv1:
Supports route tags to implement flexible route control through routing policies.
Supports masks, route summarization, and CIDR.
Supports designated next hops to select the best ones on broadcast networks.
Supports multicasting route updates so only RIPv2 routers can receive these updates to reduce
resource consumption.
Supports plain text authentication and MD5 authentication to enhance security.
RIPv2 supports two transmission modes: broadcast and multicast. Multicast is the default mode
using 224.0.0.9 as the multicast address. An interface operating in RIPv2 broadcast mode can also
receive RIPv1 messages.
Protocols and standards
RFC 1058, Routing Information Protocol
RFC 1723, RIP Version 2 - Carrying Additional Information
RFC 1721, RIP Version 2 Protocol Analysis
RFC 1722, RIP Version 2 Protocol Applicability Statement
RFC 1724, RIP Version 2 MIB Extension
RFC 2082, RIPv2 MD5 Authentication
RFC 2453, RIP Version 2
RIP configuration task list
Configuring basic RIP:
• (Required.) Enabling RIP
• (Optional.) Controlling RIP reception and advertisement on interfaces
• (Optional.) Configuring a RIP version
(Optional.) Configuring RIP route control:
• Configuring an additional routing metric
• Configuring RIPv2 route summarization
• Disabling host route reception
• Advertising a default route
• Configuring received/redistributed route filtering
• Setting a preference for RIP
• Configuring RIP route redistribution
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