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FTOS Configuration Guide for the C-Series - Force10 Networks

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There are five types of TLVs. All types are mandatory in <strong>the</strong> construction of an LLDPDU except Optional<br />

TLVs. The inclusion of individual Optional TLVs is user configurable.<br />

Table 22 Type, Length, Value (TLV) Types<br />

Type TLV Description<br />

0 End of LLDPDU Marks <strong>the</strong> end of an LLDPDU<br />

1 Chassis ID An adminstratively assigned name that identifes <strong>the</strong> LLDP agent<br />

2 Port ID An adminstratively assigned name that identifies a port through which TLVs are<br />

sent and received<br />

3 Time to Live A value that tells <strong>the</strong> receiving agent how long <strong>the</strong> in<strong>for</strong>mation contained in <strong>the</strong><br />

TLV Value field is valid<br />

— Optional Includes sub-types of TLVs that advertise specific configuration in<strong>for</strong>mation.<br />

These sub-types are Management TLVs, IEEE 802.1, IEEE 802.3, and<br />

TIA-1057 Organizationally Specific TLVs.<br />

Figure 186 LLDPDU Frame<br />

Preamble Start Frame<br />

Delimiter<br />

Destination MAC<br />

(01:80:C2:00:00:0E)<br />

TLV 1<br />

Chassis ID<br />

Optional TLVs<br />

TLV 2<br />

Port ID<br />

<strong>FTOS</strong> supports <strong>the</strong> following optional TLVs:<br />

• Management TLVs<br />

Source MAC<br />

• IEEE 802.1 and 802.3 Organizationally Specific TLVs<br />

• TIA-1057 Organizationally Specific TLVs<br />

Management TLVs<br />

TLV 3<br />

Port Description<br />

E<strong>the</strong>rnet Type<br />

(0x88CC)<br />

TLV 4<br />

System Name<br />

TLV 5<br />

System Description<br />

LLDPDU Padding FCS<br />

TLV 6<br />

System Capabilities<br />

TLV 7<br />

Management Addr<br />

TLV 127<br />

Organizationally Specific<br />

TLV 0<br />

End of LLDPDU<br />

A Management TLV is an Optional TLVs sub-type. This kind of TLV contains essential management<br />

in<strong>for</strong>mation about <strong>the</strong> sender. The five types are described in Table 23.<br />

fnC0047mp<br />

284 Link Layer Discovery Protocol

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