Brocade BigIron RX Series Configuration Guide - Manual (Page 337)

BigIron RX Series Configuration Guide 259
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MIB support
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The Port ID TLV format is shown below.
FIGURE 18 Port ID TLV packet format
TTL value
The Time to Live (TTL) Value is the length of time the receiving device should maintain the
information acquired through LLDP in its MIB.
The TTL value is automatically computed based on the LLDP configuration settings. The TTL value
will appear similar to the following on the remote device, and in the CLI display output on the
Brocade device (show lldp local-info):
Time to live: 40 seconds
• If the TTL field has a value other than zero, the receiving LLDP agent is notified to completely
replace all information associated with the LLDP agent or port with the information in the
received LLDPDU.
• If the TTL field value is zero, the receiving LLDP agent is notified that all system information
associated with the LLDP agent or port is to be deleted. This TLV may be used, for example, to
signal that the sending port has initiated a port shutdown procedure.
The LLDPDU format is shown in “LLDPDU packet format” on page 256.
The TTL TLV format is shown below.
FIGURE 19 TTL TLV packet format
MIB support
Brocade devices support the following standard MIB modules:
• LLDP-MIB
• LLDP-EXT-DOT1-MIB
• LLDP-EXT-DOT3-MIB
TLV Type = 2 TLV Information
String Length
Port ID Subtype Port ID
TLV Header TLV Information String
7 bits 9 bits 1 octet 1 < n < 255 octets
TLV Type = 3 TLV Information
String Length = 2
Time to Live (TTL)
7 bits 9 bits 2 octets