Asante Technologies 35516 user manual Configuring Ospf, Enable Ospf, Configure ABR Type

Router(config)# access-list 101 permit tcp 192.168.123.0 0.0.0.255 any eq 25 Router(config)# access-list 101 deny any

Router(config)# interface eth1 Router(config-if-eth1)# ip ?

access-group Apply an access-group entry Router(config-if-eth1)# ip access-group ?

WORD access-list number or name Router(config-if-eth1)# ip access-group 101 ?

in inbound direction out outbound direction

Router(config-if-eth1)# ip access-group 101 out Router(config-if-eth1)# exit

5.7 Configuring OSPF

Open Shortest Path First (OSPF) is an interior gateway protocol (IGP) designed expressly for IP networks. OSPF supports IP sub-netting and tagging of externally derived routing information, as well as supporting packet authentication and IP multicasting when sending/receiving packets.

OSPF works best in a hierarchical routing environment. The first and most important decision on OSPF network is to determine area border routers (routers connected to multiple areas), and autonomous system boundary routers. At a minimum, OSPF-based routers can be configured with all the default parameter values, no authentication, and interfaces assigned to areas. If users intend to customize their networking environment, they must ensure coordinated configurations of all routers.

To configure OSPF, complete the tasks in the following sections. After enabling OSPF, the other configuration tasks are optional.

5.7.1 Enable OSPF

As with other routing protocols, enabling OSPF requires that you create an OSPF routing process, specify the range of IP addresses to be associated with the routing process, and assign area IDs to be associated with that range of IP addresses. Perform the following tasks, starting in global configuration mode.

Command	Purpose
router ospf	Step 1	Enable an OSPF routing process, which
	places you in router configuration mode.
router-id router-id	Step 2	Specify a routing process ID. A router ID is
	a 32-bit number in dotted-decimal notation.
network prefix-length area	Step 3	Define an interface on which to run OSPF
{area-ID area-address}	and specify the area ID or IP address for that
	interface.

5.7.2 Configure ABR Type

The IC35516 OSPF conforms to the specifications in standard RFC2328. As there are a variety of implementations that support OSPF, the OSPF configuration depends on different type of routers. To configure OSPF on an Area Border Router (ABR), specify what type the router belongs to.

Command	Purpose
abr-type {cisco ibm shortcut	Specify a router (ABR) type.
standard}

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