To specify how often the Cisco IOS software sends CDP updates, use the cdp timer global configuration command. Use the no form of this command to revert to the default setting.
cdp timer seconds
no cdp timer
seconds Specifies how often the Cisco IOS software sends CDP updates.
60 seconds
Global configuration
| Release | Modification | 10.3 | This command was introduced. |
|---|
The trade-off with sending more frequent transmissions is providing up-to-date information versus using bandwidth more often.
The cdp enable, cdp timer , andcdp run commands affect the operation of the IP on demand routing feature (that is, the router odr global configuration command). For more information on the router odr command, see the "On-Demand Routing Commands" chapter in the Network Protocols Command Reference, Part 1 .
In the following example, CDP updates are sent every 80 seconds, less frequently than the default setting of 60 seconds. You might want to make this change if you are concerned about preserving bandwidth.
cdp timer 80
| Command | Description |
|---|---|
| cdp holdtime | Specifies the amount of time the receiving device should hold a CDP packet from your router before discarding it. |
| show cdp | Displays global CDP information, including timer and hold-time information. |
Printed for apswan@ctr.ap.nic.in on Wed Mar 5 22:32:57 PST 2003
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