HP 4108GL Management And Configuration Manual page 246

Configuring for Network Management Applications
CDP
neighbor pairs are as follows: A/1, A/2, A/3, A/B, B/C. Note that "C" and "E" are
not neighbors because the intervening CDP-disabled switch "D" does not
forward CDP packets; i.e. is not transparent to CDP traffic. (For the same
reason, switch "E" does not have any CDP neighbors.)
Switch "A"
CDP
(CDP Running)
CDP Neighbor Table
Port | Data
-------|--------------------
A1 | Host 1 data
A1 | Host 2 data
A1 | Host 3 data
A2 | Switch "B" data
Switch "B"
CDP
(CDP Running)
CDP Neighbor Table
Port | Data
-------|--------------------
B1 | Switch "A" data
B7 | Switch "C" data
No CDP data for Switch
"D" because it has dis-
abled CDP operation.
Switch "C"
CDP
(CDP Running)
CDP Neighbor Table
Port | Data
-------|--------------------
C3 | Switch "B" data
Figure 12-7. Example of Incoming CDP Packet Results
12-16
Port A1
Non-CDP Device "X"
Such as a Non-CDP
Hub or Switch
Port A2
Non-CDP Device "Y"
Such as a Non-CDP
Hub or Switch
Port B1
Port D3
Port B5
CDP-Disabled
(No CDP Neighbor Table)
This switch drops CDP packets.
Port B7
Port 3
"A", "1", "2", and "3" are CDP neighbors.
"A" and "B" are CDP neighbors.
"B" and "C" are CDP neighbors.
Because "D" is CDP-capable, but has
disabled CDP, it is not a CDP neighbor
to either "B" or "E".
Workstation "1"
CDP
(Host 1)
(CDP Running)
Workstation "2"
CDP
(Host 2)
(CDP Running)
Workstation "3"
CDP
(Host 3)
(CDP Running)
Switch "D"
CDP Neighbor Table
Port E1
Port D17
Switch "E"
CDP
(CDP Running)
Empty-No CDP
Neighbors