[How to] do trouble shooting with LLDP setting on Switch

Let me assume if there is a simple topology here
                              +------------------+
                      Switch  |  172.17.255.254  |
                              +-----+------------+
              +-----------------+   |
      Switch  |   172.17.4.1    |<--+
              +----------+------+
 +--------------+        |
 | Your Server: |        |
 | 172.17.2.200 |<-------+
 +--------------+

A. Make sure Switch and Switch could ping each other
  1. telnet 172.17.255.254
  2. ping 172.17.4.1
B. Make sure that every port should have "management address" checked.

C. Use snmpwalk to check 172.17.255.254 has remote ip address of 172.17.4.1
  • exp: snmpwalk -c public -v2c 172.17.255.254 1.0.8802.1.1.2.1.4.2.1.3
  • if we cannot see the result as follows, it means that the LLDP configuration setting on Switch 172.17.255.254 is wrong. 
         Result: iso.0.8802.1.1.2.1.4.2.1.3.0.4.55.1.4.172.17.4.1 = INTEGER: 2

D. Use snmpwalk to check 172.17.4.1if it has remote ip address of 172.17.255.254
  • exp: snmpwalk -c public -v2c 172.17.4.1 1.0.8802.1.1.2.1.4.2.1.3
  •  if we cannot see the result as follows, it means that the LLDP configuration setting on Switch 172.17.4.1 is wrong.

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