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OmniAccess SafeGuard OS Administration Guide
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Chapter 5: Setting Up SafeGuard Switches
Configuring Routing
SafeGuard OS supports both IP unicast and IP multicast routing on the SafeGuard
Switch. In IP unicast routing, data packets are sent from a single source device to a single
recipient. In IP multicast routing, a single copy of data is sent to a group of recipients
using a single address for the group.
Networks that employ IP unicast communication send datagrams from a source device to
a single destination device. SafeGuard Switches use Address Resolution Protocol (ARP)
to resolve the link layer address.
Multicasting allows a device on a LAN or VLAN to send packets, not to just one
recipient, but to a group or collection of other devices. Multicasting is considered a more
efficient method of routing because it conserves bandwidth and reduces traffic by being
able to deliver simultaneously a single stream of information to multiple devices.
In a multicast environment, instead of using an individual IP address, the source device
uses an address that identifies the members of the group. When the source device sends
the group IP address, routers on the LAN or VLAN forward the packets to all the
members of the multicast group. If necessary, the routers forward duplicate data packets
wherever the path to recipients diverge.
See the following sections for more details:
■ Configuring IP Unicast Routing
■ Configuring Static Routing
■ Displaying Routing Information
■ Configuring Bootstrap or DHCP Relay
■ IP Multicast Routing
Configuring IP Unicast Routing
This section describes how to configure IP unicast routing. See the following sections for
more details:
■ Configuring Address Resolution Protocol
■ Displaying ARP Information
■ Optional Routing Configurations
■ Setting an Administrative Distance or Preference
Configuring Address Resolution Protocol
A network device uses Address Resolution Protocol (ARP) to locate other devices by
associating MAC addresses with IP Addresses. ARP is a very simple protocol that