User manual

4-4
Analyze Network
Selecting the Test Mode
Chapter 4
Port Info
Select the PORT INFO button in the Bottom Area. The PORT INFO Screen
decodes LLDP and CDP frames which are shown on the screen in the
order they were received.
Type 1 TLVs –
Displays “Type 1 – Device ID”
Displays “LENGTH: “ followed by the actual string length in the
TLV (Displays up to 25 characters of the string in the TLV)
Type 2 TLVs–
Displays “Type 2 – n Addresses” (where n is the actual number
of addresses contained in the TLV – note this displays “1
address” if the number of addresses is 1)
Displays one line per address in the TLV as follows (n is 1
upwards indicating the position in the TLV) –
Either : “n: IPv4 xxx.xxx.xxx.xxx” where xxx.xxx.xxx.xxx is the
IPv4 address in this part of the TLV
Or : “n: IPv6”
Or : “n: IP UNKNOWN” if the length of the address field was not
4 or 16
Or : “n: NLPID UNKNOWN” if defined using NLPID but the protocol
was not the IP type (0xCC)
Or : “n: 802.2 UNKNOWN” if defined using 802.2 but the protocol
was not 8 bytes, or was not 0xAAAA030000000800
Or : “n: PROTOCOL UNKNOWN” if not defined suing either NLPID
or 802.2
Type 3 TLVs–
Displays “Type 3 – Port ID”
Displays “LENGTH: “ followed by the actual string length in the
TLV (Displays up to 25 characters of the string in the TLV
hexadecimal format, e.g. 0x00000000)
Example Port 1 Info Screen
LLDP/CDP/FDP Frames Decoded
Example Port 2 Info Screen Example Port 3 Info Screen