Ben's notes

If you have a switch that supports LLDP, then you can use the lldpad to send and receive LLDP PDUs.

yum install lldpad
chkconfig lldpad on
service lldpad start

• -L = set parameters for interface
• -i = interface
• -g = bridge scope

  # enable transmission of information
  lldptool -L -i eth0 adminstatus=rxtx
  
  lldptool -i eth0 -T -V portDesc enableTx=yes
  lldptool -i eth0 -T -V sysName  enableTx=yes
  lldptool -i eth0 -T -V sysDesc enableTx=yes
  lldptool -i eth0 -T -V sysCap enableTx=yes
  lldptool -i eth0 -T -V mngAddr ipv4=192.168.42.66 enableTx=yes
  
  service lldpad restart

lldptool -t -n -i eth0

Chassis ID TLV
        MAC: 9c:8e:99:bd:b1:20
Port ID TLV
        Local: 12
Time to Live TLV
        120
Port Description TLV
        Port #12
System Name TLV
        switch1
System Description TLV
         HP ProCurve 1810G - 24 GE, P.2.12, eCos-2.0, CFE-2.1
System Capabilities TLV
        System capabilities:  Bridge
        Enabled capabilities: Bridge
Management Address TLV
        IPv4: 192.168.40.11
        Ifindex: 25
End of LLDPDU TLV

• Port and CDP Neighbor Info:

  tcpdump -v -s 1500 -c 1 '(ether[12:2]=0x88cc or ether[20:2]=0x2000)'