Connectivity Guide
Example (Brief)
OS10# show ipv6 interface brief
Interface admin/ IPV6 Address/ IPv6 Oper
Name protocol Link-Local Address Status
============================================================
Management 1/1/1 up/up fe80::20c:29ff:fe54:c852/64 Enabled
Vlan 1 up/up fe80::20c:29ff:fe54:c8bc/64 Enabled
Ethernet 1/1/2 up/up fe80::20c:29ff:fe54:c853/64
100::1/64
1001:1:1:1:20c:29ff:fe54:c853/64 Enabled
Ethernet 1/1/3 up/up fe80::4/64
3000::1/64
4000::1/64 Disabled
Ethernet 1/1/4 up/up fe80::4/64
4::1/64
5::1/64 Enabled
Supported Releases 10.2.0E or later or later
Open shortest path rst
OSPF routing is a link-state routing protocol that allows sending link-state advertisements (LSAs) to all other routers within the same
autonomous system (AS) area. OSPF LSAs include information about attached interfaces, metrics used, and other attributes. OSPF routers
accumulate link-state information, and use the shortest path rst (SPF) algorithm to calculate the shortest path to each node.
Autonomous system areas
OSPF operates in a hierarchy. The largest entity within the hierarchy is the autonomous system (AS). The AS is a collection of networks
under a common administration that share a common routing strategy. OSPF is an intra-AS, Interior Gateway Routing Protocol (IGRP) that
receives routes from and sends routes to other AS.
You can divide an AS into several areas, which are groups of contiguous networks and attached hosts administratively grouped. Routers
with multiple interfaces can participate in multiple areas. These routers, called area border routers (ABRs), maintain separate databases for
each area. Areas are a logical grouping of OSPF routers that an integer or dotted-decimal number identies.
Areas allow you to further organize routers within the AS with one or more areas within the AS. Areas allow subnetworks to hide within the
AS—minimizing the size of the routing tables on all routers. An area within the AS may not see the details of another area’s topology. An
area number or the router’s IP address identies AS areas.
528
Layer 3