10-23
Configuring for Network Management Applications
CDP
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 drop inbound CDP packets without
recording their data in the CDP Neighbors table. Suppose, for example, that
switches "A" and "B" in figure 10-13 (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 drop the CDP packets it receives from switch
"B".
Figure 10-13. Example of Disabling CDP on an Individual Port
(The switch "A" entry in the switch "B" CDP Neighbors table remains until the
cdp holdtime
(time-to-live; set in switch "A") expires. Until then, the
show cdp
neighbors
command continues to list switch "A" on port B5 of switch "B".)
Syntax:
[no] cdp enable <[ethernet] port-list>
For example, to disable CDP on port A1 of a Series 4100GL switch:
HPswitch(config) no cdp enable a1
Switch "A"
CDP Enabled on Port A1
CDP Neighbor Table
Port | Data
------|------------------
A1
|
Switch "B" data
Switch "B"
CDP Enabled on Port B5
CDP Neighbor Table
Port | Data
------|------------------
B5
|
Switch "A" data
CDP Enabled on both
ends of the link between
"A" and "B".
Port A1
Port B5
Switch "A"
CDP Disabled on Port A1
CDP Neighbor Table
-
Empty for port A1
-
Switch "B"
CDP Enabled on Port B5
CDP Neighbor Table
- Empty for Port B5 -
CDP disabled on port A1
of switch "A" (but
enabled on port B5 of
switch "B".
Port A1
Port B5
Summary of Contents for ProCurve 4104GL
Page 2: ......
Page 26: ...xxiv Getting Started Need Only a Quick Start ...
Page 34: ...1 8 Selecting a Management Interface Advantages of Using HP TopTools for Hubs Switches ...
Page 50: ...2 16 Using the Menu Interface Where To Go From Here ...
Page 172: ...8 24 Time Protocols SNTP Messages in the Event Log ...
Page 240: ...10 30 Configuring for Network Management Applications CDP ...
Page 288: ...11 48 Port Based Virtual LANs VLANs and GVRP GVRP ...
Page 480: ...C 38 Troubleshooting Restoring a Flash Image ...
Page 486: ...D 6 MAC Address Management Determining MAC Addresses ...
Page 490: ......
Page 502: ...12 Index ...
Page 503: ......