OSPF
Internal versus external routing
To ensure effective processing of network traffic, every routing device on your network needs to know how to send a packet (directly or indirectly) to any other location/destination in your network. This is referred to as internal routing and can be done with static routes or using active internal routing protocols, such as OSPF, RIP, or RIPv2.
It is also useful to tell routers outside your network (upstream providers or peers) about the routes you have access to in your network. Sharing of routing information between autonomous systems is known as external routing.
Typically, an AS will have one or more border routers (peer routers that exchange routes with other OSPF networks) as well as an internal routing system enabling every router in that AS to reach every other router and destination within that AS.
When a routing device advertises routes to boundary routers on other autonomous systems, it is effectively committing to carry data to the IP space represented in the route being advertised. For example, if the routing device advertises 192.204.4.0/24, it is declaring that if another router sends data destined for any address in the 192.204.4.0/24 range, it will carry that data to its destination.
OSPF implementation in HP 10GbE switch softwareThe HP 10GbE switch supports a single instance of OSPF and up to 4 K routes on the network. The following sections describe OSPF implementation in switch software:
•Configurable Parameters
•Defining Areas
•Interface Cost
•Electing the Designated Router and Backup
•Summarizing Routes
•Default Routes
•Virtual Links
•Router ID
•Authentication
Configurable parameters
In HP 10GbE switch software, OSPF parameters can be configured through the Command Line Interface (CLI),
The CLI supports the following parameters: interface output cost, interface priority, dead and hello intervals, retransmission interval, and interface transit delay.
OSPF
In addition to the above parameters, you can also specify the following:
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•Shortest Path First (SPF)
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