18. Dynamic routing RIP Protocol based on three-layer Technology

Dynamic routing protocol classification:

Distance Vector Routing Protocol: Select a route by the number of routes passed from the source network to the destination. Typical protocols are RIP and IGRP.

Link-state routing protocols: Route selection takes into account all paths from the source network to the destination. Typical protocols are OSPF and IS-IS.

RIP is a distance vector routing protocol, which measures the number of routes (hops). It supports up to 15 hops, that is, it can only dynamically learn route entries on 15 routes. 16 is unreachable.

RIP has an administrative distance of 120.

RIP routing update process: periodic update, neighbor update, broadcast update, full routing table update.

Convergence: When RIP reaches the second update cycle, the information between routers is the same, and the router learns all the network states.

Split horizon: learn routing information from an interface and not send it out that interface. The creation of loops can be organized.

RIP version differences

RIPV1

RIPV2

Broadcast Send Routing Update, 255.255.255.255

multicast routing update, 224.0.0.9

classful routing protocols

Classless routing protocol, can carry masks

Subnetting is not supported VLSM

VLSM with subnet support

Automatic summary, manual summary is not supported

Support manual summary

CISCO RIP related commands:

command

described

(config)# router rip

Create and enter RIP process

(config-router)# version 2

Switch version to RIPV2

(config-router)# no auto-summary

Turn off automatic summary

(config-router)# network segment

announce segment

# show ip protocols

View the configuration of routing protocols

Huawei H3C related commands:

command

described

[huawei] rip 1

Create and enter RIP process

[huawei-rip-1] version 2

Switch version to RIPV2

[huawei-rip-1] network segment

announce segment

[huawei] display rip 1 route

View RIP routing tables