Allied Telesis AT-WR4500 manual General Setup

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers	99
RouterOS v3 Configuration and User Guide

RelatedTopics

•IP Addresses and ARP

•Routes, Equal Cost Multipath Routing, Policy Routing

•Log Management

Description

Open Shortest Path First protocol is a link-state routing protocol. It's uses a link-state algorithm to build and calculate the shortest path to all known destinations. The shortest path is calculated using the Dijkstra algorithm. OSPF distributes routing information between the routers belonging to a single autonomous system (AS). An AS is a group of routers exchanging routing information via a common routing protocol.

In order to deploy the OSPF all routers it will be running on should be configured in a coordinated manner.

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It also means that the routers should have the same MTU for all the networks advertised by the OSPF protocol

The OSPF protocol is started after you will add a record to the OSPF network list. The routes learned by the OSPF protocol are installed in the routes table list with the distance of 110.

5.3.2 General Setup

Submenu level: /routing ospf

Description

In this section you will learn how to configure basic OSPF settings.

Property Description

distribute-default(never if-installed-as-type-1 if-installed-as-type-2 always-as-type-1 always-as- type-2; default: never) - specifies how to distribute default route. Should be used for ABR (Area Border router) or ASBR (Autonomous System boundary router) settings

never - do not send own default route to other routers

if-installed-as-type-1 - send the default route with type 1 metric only if it has been installed (a static default route, or route added by DHCP, PPP, etc.)

if-installed-as-type-2 - send the default route with type 2 metric only if it has been installed (a static default route, or route added by DHCP, PPP, etc.)

always-as-type-1 - always send the default route with type 1 metric always-as-type-2 - always send the default route with type 2 metric

metric-bgp(integer; default: 20) - specifies the cost of the routes learned from BGP protocol

metric-connected(integer; default: 20) - specifies the cost of the routes to directly connected networks

metric-default(integer; default: 1) - specifies the cost of the default route

metric-rip(integer; default: 20) - specifies the cost of the routes learned from RIP protocol

metric-static(integer; default: 20) - specifies the cost of the static routes

redistribute-bgp(as-type-1 as-type-2 no; default: no) - with this setting enabled the router will redistribute the information about all routes learned by the BGP protocol redistribute-connected(as-type-1 as-type-2 no; default: no) - if set, the router will redistribute the information about all connected routes, i.e., routes to directly reachable networks redistribute-rip(as-type-1 as-type-2 no; default: no) - with this setting enabled the router will redistribute the information about all routes learned by the RIP protocol

redistribute-static(as-type-1 as-type-2 no; default: no) - if set, the router will redistribute the information about all static routes added to its routing database, i.e., routes that have been created using the /ip route add command

router-id(IP address; default: 0.0.0.0) - OSPF Router ID. If not specified, OSPF uses the largest IP address configured on the interfaces as its router ID