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8.3.17.0 - Force10 Networks

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www.dell.com | support.dell.com<br />

Figure 14-5. LLDP-MED Policies TLV<br />

TLV Type<br />

(127)<br />

TLV Length<br />

(8)<br />

Organizationally<br />

Unique ID<br />

(00-12-BB)<br />

Extended Power via MDI TLV<br />

The Extended Power via MDI TLV enables advanced power over ethernet (PoE) management between<br />

LLDP-MED endpoints and network connectivity devices (Figure 14-6). Advertise the Extended Power via<br />

MDI on all ports that are connected to an 802.3af powered, LLDP-MED endpoint device.<br />

• Power Type—there are two possible power types: power sourcing entity (PSE) or power device (PD).<br />

The Dell <strong>Force10</strong> system is a PSE, which corresponds to a value of 0, based on the TIA-1057<br />

specification.<br />

• Power Source—there are two possible power sources: Primary and Backup. The Dell <strong>Force10</strong> system<br />

is a Primary Power Source, which corresponds to a value of 1, based on the TIA-1057 specification.<br />

• Power Priority—there are three possible priorities: Low, High, and Critical. On Dell <strong>Force10</strong><br />

systems, the default power priority is High, which corresponds to a value of 2 based on the TIA-1057<br />

specification. You can configure a different power priority through the CLI. Dell <strong>Force10</strong> also honors<br />

the power priority value sent by the powered device. However, the CLI configuration takes<br />

precedence.<br />

• Power Value—Dell <strong>Force10</strong> advertises the maximum amount of power that can be supplied on the<br />

port. By default it is 15.4W, which corresponds to a Power Value of 130, based on the TIA-1057<br />

specification. You can advertise a different Power Value using the max-milliwatts option with the power<br />

inline auto | static command. Dell <strong>Force10</strong> also honors the power value (power requirement) sent by the<br />

powered device when the port is configured for power inline auto.<br />

Figure 14-6. Extended Power via MDI TLV<br />

172 | Link Layer Discovery Protocol (LLDP)<br />

Organizationally<br />

Defined Sub-type<br />

(2)<br />

7 bits 9 bits 3 octets 1 octet<br />

TLV Type<br />

(127)<br />

TLV Length<br />

(7)<br />

Organizationally<br />

Unique ID<br />

(00-12-BB)<br />

Organizationally<br />

Defined Sub-type<br />

(4)<br />

Application Type<br />

(0-255)<br />

1 octet<br />

Power Type<br />

(0)<br />

U<br />

T<br />

3 bits<br />

X<br />

(0)<br />

Power Source<br />

(1)<br />

VLAN ID<br />

(0-4095)<br />

12 bits<br />

Power Priority<br />

(2)<br />

7 bits 9 bits 3 octets 1 octet 2 bits 2 bits<br />

4 bits<br />

L2 Priority<br />

(0-7)<br />

DSCP Value<br />

(0-63)<br />

3 bits 6 bits<br />

Power Value<br />

(130)<br />

2 octets<br />

fnC0056mp

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