Nortel 1110 Installation And Operation Manual page 524

Page 524 of 630
553-3001-368 Standard 26.00
Appendix D: 802.1ab Link Layer Discovery Protocol
routers to exchange information about their capabilities with other devices
and to store this information in a Management Information Base (MIB).
LLDP also enables the system administrator to view the entire network
infrastructure.
The Telecommunications Industry Association (TIA) developed the Link
Layer Discovery Protocol (LLDP)-Media Endpoint Discovery (LLDP-MED)
extension of 802.1ab LLDP for VoIP networks, as defined by ANSI/TIA-
1057. This extension enables media devices such as IP Phones, IP media
gateways, IP media servers, and IP media controllers to transmit and receive
media related information.
LLDP provides the following functionality:
• periodic transmission of advertisements containing device information
• device capabilities and media specific configuration information to
neighbors in the same network
• implementation of behavioral requirements specified by LLDP-MED
The 802.1ab feature provides automatic configuration of the IP Phone's
network policy parameters, such as VLAN ID, as well as, automatic detection
of misconfigurations, such as Duplex discrepancies.
The 802.1ab feature is enabled by default. However, you can disable the
feature during manual configuration.
For information about 802.1ab configuration, see the applicable IP Phone
section.
August 2007