Ericsson ECN330, User Manual

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Configuring the ECN330-switch
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in the current flow are simply switched or forwarded across the chosen path.
This takes advantage of the high throughput and low latency of switching by
enabling the traffic to bypass the routing engine once the path calculation has
been performed.
6.20.2.1 Routing Path Management
Routing Path Management involves the determination and updating of all the
routing information required for packet forwarding, including:
• Handling routing protocols
• Updating the routing table
• Updating the Layer 3 switching database
6.20.2.2 Routing Protocols
The ECN330-switch supports both static and dynamic routing.
• Static routing requires routing information to be stored in the ECN330-
switch either manually or when a connection is set up by an application
outside the ECN330-switch.
• Dynamic routing uses a routing protocol to exchange routing
information, calculate routing tables, and respond to changes in the
status or loading of the network.
The ECN330-switch supports RIP, RIP-2 and OSPFv2 dynamic routing
protocols.
RIP and RIP-2 Dynamic Routing Protocols
The RIP protocol is the most widely used routing protocol. RIP uses a distance-
vector-based approach to routing. Routes are determined on the basis of
minimizing the distance vector, or hop count, which serves as a rough estimate
of transmission cost. Each router broadcasts its advertisement every 30
seconds, together with any updates to its routing table. This allows all routers on
the network to learn consistent tables of next hop links which lead to relevant
subnets.