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Rockwell Automation Publication 1783-UM007I-EN-P - December 2017 255
Configure Switch Features Chapter 3
Stratix switches that support Layer 3 routing can route packets by using these
methods.
See the following manuals:
•
For more information about routing features and how to modify them,
see the Cisco IE3000 Switch Software Configuration Manual, available
from
http://www.Cisco.com .
•
For information about using the CLI to configure routing, see the Cisco
IE3000 Switch Command-Line Interface Manual, available from
http://www.Cisco.com .
Table 97 - Routing Methods
Feature Description
EIGRP See Enhanced Interior Gateway Routing Protocol (EIGRP) on page 136 .
OSPF See Open Shortest Path First (OSPF) Routing Protocol on page 203 .
Static and connected routing See Routing, Static and Connected on page 256 .
Dynamic routing Dynamic routing protocols are used by Layer 3 switches to calculate dynamically the best route for forwarding traffic. There are two
types of dynamic routing protocols:
• Distance-vector protocols
• Link-state protocols
Layer 3 switches using distance-vector protocols maintain routing tables with distance values of networked resources, and
periodically pass these tables to their neighbors. Distance-vector protocols use one or a series of metrics for calculating the best
routes. These protocols are easy to configure and use.
The switch supports these distance-vector protocols:
• Routing Information Protocol (RIP), which uses a distance metric (cost) to determine the best path
• Border Gateway Protocol (BGP), which adds a path vector mechanism
The switch also supports the Open Shortest Path First (OSPF) link-state protocol and Enhanced IGRP (EIGRP). The features add
link-state routing features to traditional Interior Gateway Routing Protocol (IGRP) to improve efficiency.
Routers that use link-state protocols maintain a complex database of network topology, which is based on the exchange of link-
state advertisements (LSAs) between routers. An event in the network triggers LSAs, which speed up the convergence time or time
that is required to respond to these changes. Link-state protocols respond quickly to topology changes, but require greater
bandwidth and more resources than distance-vector protocols
Unicast routing Unicast routing is used for all network processes where a private or unique resource is requested.
Multicast routing In multicast routing, routers create optimal distribution paths for data that is sent to a multicast destination address spanning tree
in real time. Multicast routing protocols that are supported are PIM (SM, SM, SDM), DVMRP tunneling.
Redundant routing Redundant routing localizes the effects of route failures, and reduces control traffic overhead and route reconfiguration time by
providing a redundant network path. Redundant routing protocols that are supported are HSRP (Hot Standby Router Protocol) and
CEF (Cisco Express Forwarding).
IPv6 routing IPv6 network segments, also known as links or subnets, are connected by IPv6 routers, which are devices that pass IPv6 packets
from one network segment to another. EIGRP is the supported protocol.
VRF Lite Virtual routing and forwarding (VRF) lets multiple instances of a routing table to coexist within the same router simultaneously.
Because the routing instances are independent, the same or overlapping IP addresses can be used without conflicting with each
other. The simplest form of VRF implementation is VRF Lite. In this implementation, each router within the network participates in
the virtual routing environment in a peer-based fashion.