Ip Multicast - Avaya Cajun P882 User Manual

Chapter 9
Enabling Option
82 by Using the
CLI

IP Multicast

9-48
* Note: BOOTP/DHCP relay Agent must be set to enable, and
must be enabled on the desired IP interface (enabled by
default).
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 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. One
copy of the packet is sent to the VLAN.To configure interfaces
for multicast forwarding select Internet Group Management
Protocol (IGMP) for the multicast protocol.
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1