Reference Guide
Usage Information None
Example (All)
OS10# show ipv6 route all
Codes: C - connected
S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF,IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
---------------------------------------------------------
Example
(Connected)
OS10# show ipv6 route connected
Codes: C - connected
S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF,IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
------------------------------------------------------------------
C 2001:db86::/32 via 2001:db86:fff::1 ethernet1/1/1 0/0 00:03:24
Example (Summary)
OS10# show ipv6 route summary
Route Source Active Routes Non-Active Routes
Ospf 0 0
Bgp 0 0
Connected 0 0
Static 0 0
Ospf Inter-area 0 0
NSSA External-1 0 0
NSSA External-2 0 0
Ospf External-1 0 0
Ospf External-2 0 0
Bgp Internal 0 0
Bgp External 0 0
Ospf Intra-area 0 0
Total 0 0
Supported Releases 10.2.0E or later
Open shortest path rst
OSPF routing is a link-state routing protocol that allows sending of link-state advertisements (LSAs) to all other routers within the same
autonomous system (AS) area. Information about attached interfaces, metrics used, and other attributes are included in OSPF LSAs. 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 type of 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 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.
288
Layer 3