How to adjust routing priority on an AR router

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Commands about routing priority of an AR router are as follows:
1. ip route-staticip-address nexthop-address preferencepreference
2. preference (OSPF)
For details about how to configure routing priorities and save data on a web page, see the URL: http://support.huawei.com/ecommunity/bbs/10276523.html.

Other related questions:
What are priorities of static routes and default routes of the AR router
Default routes can be statically configured or dynamically generated through dynamic routing protocols. If the default route is dynamically generated through dynamic routing protocols, its priority is the same as corresponding protocol. If the default route is statically configured, the default priority is 60, which is similar to that of the static route. Routes comply with the longest mask bit match principle. Specific routes are matched first, and then default routes are matched if the specific routes are not matched.

Priorities of policy-based routing and default routing for an AR router
Policy-based routing has a higher priority than default routing. If policy-based routing and default routing coexist, only policy-based routing takes effect. After policy-based routing loses effect, default routing takes effect.

How to dynamically adjust the CPCAR rate on an AR router
In case of a system attack, the CPCAR rate static adjustment function cannot control the rate of delivering packets to the CPU in a timely manner. As a result, the CPU is overloaded, severely affecting the running state of the CPU. The CPCAR rate dynamic adjustment function can periodically detect the CPU usage. When detecting that the current CPU usage of the system exceeds a set threshold, the function dynamically adjusts the CPCAR within a normal range to reduce the impact of the attack on the CPU. The configuration procedure is as follows: 1. Run the system-view command to access the system view. 2. Run the cpu-defend policy policy-name command to access the anti-attack policy view. 3. Run the rate-adaption enable command to enable the CPCAR rate dynamic adjustment function. By default, the CPCAR rate dynamic adjustment function is not enabled. 4. Run the rate-adaption adjust-period period-value command to configure an interval of periodically detecting the CPU usage. By default, the periodical detection interval is 30s. 5. Run the rate-adaption cpu-usage threshold low low-value high high-value command to configure a CPU load threshold for triggering the CPCAR rate dynamic adjustment function. By default, the minimum CPU load threshold for triggering CPCAR rate dynamic adjustment is 65%, and the maximum threshold is 85%. 6. Run the rate-adaption adjust-step step-value command to configure an adjustment amplitude of the CPCAR rate. By default, the adjustment amplitude of the CPCAR rate is 20%. 7. (Optional) Run the rate-adaption exception packet-type packet-type command to configure types of protocols to which the CPCAR rate dynamic adjustment function does not apply. By default, the CPCAR rate dynamic adjustment function applies to all types of protocols.

Common commands used to delete routes on AR routers
The ip address command configures an IP address for an interface. The undo ip address command deletes an IP address from an interface. The ip route-static command configures a static route. The ip route-static command deletes the configured static route. The ip ip-prefix command configures an IPv4 prefix list or one entry in the IPv4 prefix list. The undo ip ip-prefix command deletes an IPv4 prefix list or one entry in the IPv4 prefix list.

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