Reference Guide

544 | Link Layer Discovery Protocol (LLDP)
www.dell.com | support.dell.com
Figure 25-5. LLDP-MED Policies TLV
Extended Power via MDI TLV
The Extended Power via MDI TLV enables advanced PoE management between LLDP-MED endpoints
and network connectivity devices. Advertise the Extended Power via MDI on all ports that are connected
to an 802.3af powered, LLDP-MED endpoint device.
• Power Type—there are two possible power types: Power Sourcing Entity (PSE) or Power Device
(PD). The Dell Force10 system is a PSE, which corresponds to a value of 0, based on the TIA-1057
specification.
• Power Source—there are two possible power sources: Primary and Backup. The Dell Force10 system
is a Primary Power Source, which corresponds to a value of 1, based on the TIA-1057 specification.
• Power Priority—there are three possible priorities: Low, High, and Critical. On Dell Force10
systems, the default power priority is “High,” which corresponds to a value of 2 based on the
TIA-1057 specification. You can configure a different power priority through the CLI, Dell Force10
also honors the power priority value sent by the powered device. However, the CLI configuration takes
precedence.
• Power Value—Dell Force10 advertises the maximum amount of power that can be supplied on the
port. By default it is 15.4W, which corresponds to a Power Value of 130, based on the TIA-1057
specification. You can advertise a different Power Value using the
max-milliwatts option with the
power inline auto | static command. Dell Force10 also honors the power value (power requirement)
sent by the powered device when the port is configured for
power inline auto.
Figure 25-6. Extended Power via MDI TLV
Configuring LLDP
Configuring LLDP is a two-step process:
1. Enable LLDP globally. See page 546.
2. Advertise TLVs out of an interface. See page 546.
Related Configuration Tasks
• Viewing the LLDP Configuration on page 548
TLV Type
(127)
TLV Length
(8)
Organizationally
Unique ID
(00-12-BB)
Organizationally
Defined Sub-type
(2)
Application Type
(0-255)
7 bits
9 bits
3 octets
1 octet
U
3 bits
1 octet
T
X
(0)
12 bits
VLAN ID
(0-4095)
L2 Priority
(0-7)
DSCP Value
(0-63)
3 bits 6 bits
TLV Type
(127)
TLV Length
(7)
Organizationally
Unique ID
(00-12-BB)
Organizationally
Defined Sub-type
(4)
Power Type
(0)
fnC0056m
p
7 bits
9 bits
3 octets
1 octet
2 bits
4 bits
Power Source
(1)
Power Priority
(2)
2 octets
Power Value
(130)
2 bits