Cisco Systems 78-11741-02 Controlling the NHRP Packet Rate

Configuring IP Addressing
Configuring Address Resolution Methods
IPC-25
Cisco IOS IP Configuration Guide
If your Cisco hardware has a Virtual Interface Processor, version 2 adapter, you must perform the
following task to change the sampling time. By default, the port adapter sends the traffic statistics to the
Route Processor every 10 seconds. If you are using NHRP in dCEF switching mode, you must change
this update rate to 5 seconds. To do so, use the following command in global configuration mode:
Applying the Rates to Specific Destinations
By default, all destinations are measured and monitored for NHRP triggering. However, you can choose
to impose the triggering and teardown rates on certain destinations. To do so, use the following
commands beginning in global configuration mode:
For an example of setting the load interval, see the section “Changing the Rate for Triggering SVCs
Example” at the end of this chapter. For an example of applying rates to destinations, see the section
“Applying NHRP Rates to Specific Destinations Example” at the end of this chapter.
Controlling the NHRP Packet Rate
By default, the maximum rate at which the software sends NHRP packets is 5 packets per 10seconds.
The software maintains a per- interface quota of NHRP packets (whether generated locally or forwarded)
that can be sent. To change this maximum rate, use the following command in interface configuration
mode:
Command Purpose
Router(config)# ip cef traffic-statistics [update-rate
seconds]
Changes the rate at which the port adapter sends
traffic statistics to the RP.
Command Purpose
Step1 Router(config)# access-list access-list-number {deny |
permit} source [source-wildcard]
or
access-list access-list-number {deny | permit}
protocol source source-wildcard destination
destination-wildcard [precedence precedence] [tos tos]
[log]
Defines a standard or extended IP access list.
Step2 Router(config)# interface type number Enters interface configuration mode.
Step3 Router(interface config)# ip nhrp interest access-list Assigns the access list created in Step 1 that
determines which destinations are included in or
excluded from the SVC triggering.
Command Purpose
Router(config-if)# ip nhrp max-send pkt-count every interval Changes the NHRP packet rate per interface.