HP ProCurve 6400cl Series Management And Configuration Manual page 359

CDP Enabled on both
ends of the link between
"A" and "B".
CDP disabled on port A1
of switch "A" (but
enabled on port B5 of
switch "B".
Figure 14-29. Example of Disabling CDP on an Individual Port
For example, to disable CDP on the switch:
HPswitch(config) no cdp run
When CDP is disabled:
■ show cdp neighbors
■ displays global CDP information and whether CDP is enabled
show cdp
on the switch.
Enabling or Disabling CDP Operation on Individual Ports. In the
factory-default configuration, the switch has all ports enabled and transmit­
ting CDP packets. Disabling CDP on a port prevents that port from sending
outbound CDP packets and causes it to receive inbound CDP packets without
recording their data in the CDP Neighbors Table. Suppose, for example, that
switches "A" and "B" in figure 14-29 (below) are running CDP, and that port
A1 on switch "A" is connected to port B5 on switch "B". If you disable CDP on
port A1 of switch "A", then switch "B" will no longer receive CDP packets from
switch "A" and switch "A" will simply forward the CDP packets it receives
from switch "B" without entering the switch "B" data in its CDP table.
Port A1
Switch "A"
CDP Enabled on Port A1
CDP Neighbors Table
Port | Data
------|------------------
A1 | Switch "B" data
Switch "A"
Port A1
CDP Disabled on Port A1
CDP Neighbors Table
-Empty for port A1-
(The switch "A" entry in the switch "B" CDP Neighbors Table remains until
the (time-to-live; set in switch "B") expires. Until then, the
cdp holdtime
neighbors command continues to list switch "A" on port B5 of switch "B".)
Syntax:
[no] cdp enable < port-list >
For example, to disable CDP on port A1 of a Series 5300xl switch:
HPswitch(config) no cdp enable a1
Configuring for Network Management Applications
displays an empty CDP Neighbors Table
Port B5
Port B5
CDP on the Series 5300xl Switches
Switch "B"
CDP Enabled on Port B5
CDP Neighbors Table
Port | Data
------|------------------
B5 | Switch "A" data
Switch "B"
CDP Enabled on Port B5
CDP Neighbors Table
- Empty for Port B5 -
show cdp
14-63