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9-50 Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Chapter
3. Select Enable.
* Note: BOOTP/DHCP relay Agent must be set to enable, and
must be enabled on the desired IP interface (enabled by
default).
Enabling Option
82 by Using the
CLI
To use the CLI to enable Option 82, enter Global Configuration
mode and use the following commands:
■ To enable circuit info 1, use the following command:
<configure># ip bootp-dhcp circuit-info
■ To enable agent info 2, use the following command:
<configure># ip bootp-dhcp agent-info
■ To disable circuit info 1, use the following command:
<configure># no ip bootpdhcp circuit-info
■ To disable agent info 2, use the following command:
<configure># no ip bootp-dhcp agent-info
For detailed information on how to enter Global Configuration
command mode, see “Accessing/Exiting the Command Modes” in
Chapter 1, “Overview,” of the Command Reference Guide for the Avaya
P550R, P580, P880, and P882 Multiservice Switches, Version 5.3.1 .
IP Multicast
IP Multicast enables a single host to distribute information to
multiple recipients. To do this, multicast protocols use class D IP
addresses to specify specific multicast groups to which information is
sent. The class D IP address used by multicast routing protocols,
ranges from 224.0.0.1 to 224.0.0.255. The class D IP addresses
available for general use are 224.0.1.0 to 239.255.255.255.
In addition, IP multicasting distributes information to multicast
groups in two specific ways:
■ Multicast Forwarding - allows a switch to forward
multicast traffic from the local multicast server to group
members on directly attached subnetworks. If a multicast
packet is forwarded to multiple interfaces on one VLAN, only
one Forwarding Entry is added on the VLAN for the packet.