Chapter 1 Cisco SDM Express
Supplementary Help
The configuration that will be delivered to the router to enable Cisco Express Forwarding is as follows:
ip cef
Set Scheduler Interval
Cisco SDM Express configures the scheduler interval on the router whenever possible. When a router is fast-switching a large number of packets, it is possible for the router to spend so much time responding to interrupts from the network interfaces that no other work gets done. Some very fast packet floods can cause this condition, which may stop administrative access to the router, a very dangerous condition when the device is under attack. Tuning the scheduler interval ensures that management access to the router is always available by causing the router to run system processes after the specified time interval even when CPU usage is at 100%.
The configuration that will be delivered to the router to tune the scheduler interval is as follows:
scheduler interval 500
Set Scheduler Allocate
On routers that do not support the command scheduler interval,
Cisco SDM Express configures the scheduler allocate command whenever possible. When a router is fast-switching a large number of packets, it is possible for the router to spend so much time responding to interrupts from the network interfaces that no other work gets done. Some very fast packet floods can cause this condition. It may stop administrative access to the router, which is very dangerous when the device is under attack. The scheduler allocate command guarantees a percentage of the router CPU processes for activities other than network switching, such as management processes.
The configuration that will be delivered to the router to set the scheduler allocate percentage is as follows:
scheduler allocate 4000 1000
| Cisco SDM Express |
1-34 | OL-7141-04 |
