Allied Telesis AT-WR4500 manual General Setup, RelatedTopics

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers	93
RouterOS v3 Configuration and User Guide

RelatedTopics

IP Addresses and ARP

Routes, Equal Cost Multipath Routing, Policy Routing

Description

Routing Information Protocol (RIP) is one protocol in a series of routing protocols based on Bellman- Ford (or distance vector) algorithm. This Interior Gateway Protocol (IGP) lets routers exchange routing information across a single autonomous system in the way of periodic RIP updates. Routers transmit their own RIP updates to neighboring networks and listen to the RIP updates from the routers on those neighboring networks to ensure their routing table reflects the current state of the network and all the best paths are available. Best path considered to be a path with the fewest hop count (id est that include fewer routers).

The routes learned by RIP protocol are installed in the route list (/ip route print) with the distance of 120.

Additional Resources

•http://www.ietf.org/rfc/rfc1058.txt (RIP v1)

•http://www.ietf.org/rfc/rfc2453.txt (RIP v2)

•http://en.wikipedia.org/wiki/Routing_Information_Protocol

5.2.2 General Setup

Property Description

distribute-default (always never if-installed; default: never) - specifies whether to redistribute the default route 0.0.0.0/0 or not

redistribute-static (yes no; default: no) - specifies whether to redistribute static routes to neighbor routers or not

redistribute-connected (yes no; default: no) - specifies whether to redistribute connected routes to neighbor routers or not

redistribute-ospf (yes no; default: no) - specifies whether to redistribute routes learned via OSPF protocol to neighbor routers or not

redistribute-bgp (yes no; default: no) - specifies whether to redistribute routes learned via bgp protocol to neighbor routers or not

metric-default (integer; default: 1) - specifies metric (the number of hops) for the default route

metric-static (integer; default: 1) - specifies metric (the number of hops) for the static routes

metric-connected (integer; default: 1) - specifies metric (the number of hops) for the connected routes

metric-ospf (integer; default: 1) - specifies metric (the number of hops) for the routes learned via OSPF protocol

metric-bgp (integer; default: 1) - specifies metric (the number of hops) for the routes learned via BGP protocol

update-timer (time; default: 30s) - specifies frequency of RIP updates

timeout-timer (time; default: 3m) - specifies time interval after which the route is considered invalid

garbage-timer (time; default: 2m) - specifies time interval after which the invalid route will be dropped from neighbor router table

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The maximum metric of RIP route is 15. Metric higher than 15 is considered 'infinity' and routes with such metric are considered unreachable. Thus RIP cannot be used on networks with more than 15 hops between any two routers, and using redistribute metrics larger that 1 further reduces this maximum hop count.