OSPF
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Managed Switches
A screen similar to the following displays.
b. Scroll down and select the RIP check box.
Now RIP appears in the Source field at the top.
c. Enter the following information:
In the Redistribute field, select Enable.
d. Under Route Redistribution, in the Available Source list, select RIP.
e. Click Add to add a route redistribution.
VLAN Routing OSPF
For larger networks Open Shortest Path First (OSPF) is generally used in preference to RIP.
OSPF offers the following benefits to the administrator of a large and/or complex network:
• Less network traffic:
- Routing table updates are sent only when a change has occurred
- Only the part of the table that has changed is sent
- Updates are sent to a multicast, not a broadcast, address
• Hierarchical management, allowing the network to be subdivided
The top level of the hierarchy of an OSPF network is known as an autonomous system (AS)
or routing domain, and is a collection of networks with a common administration and routing
strategy. The AS is divided into areas: intra-area routing is used when a source and
destination address are in the same area, and inter-area routing across an OSPF backbone
is used when they are not. An inter-area router communicates with border routers in each of
the areas to which it provides connectivity.
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