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Configuration Guide - Security

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, separating the management plane from the service plane, security risks.
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Configuring Rate Limiting on ARP Packets Globally, in a VLAN, or on an Interface

Configuring Rate Limiting on ARP Packets Globally, in a VLAN, or on an Interface

Context

NOTE:

CE6870EI and CE6875EI do not support configuring rate limiting on ARP packets in an interface view.

When processing a large number of ARP packets, a device consumes many CPU resources and cannot process other services. To protect CPU resources of the device, limit the rate of ARP packets.

After rate limiting on ARP packets is enabled, set the maximum rate of ARP packets globally, in a VLAN, or on an interface. If the number of ARP packets received each second exceeds the limit, the device discards excess ARP packets.
  • Limiting the rate of ARP packets globally: limits the number of ARP packets processed on the entire device.

  • Limiting the rate of ARP packets in a VLAN: limits the number of ARP packets to be processed on all interfaces in a VLAN. The configuration in a VLAN does not affect ARP entry learning on interfaces in other VLANs.

  • Limiting the rate of ARP packets on an interface: limits the number of ARP packets processed on an interface. The configuration on an interface does not affect ARP entry learning on other interfaces.

If the maximum rate is configured in the system view, VLAN view, and interface view at the same time, the device uses the configurations in the interface view, VLAN view, and system view in order.

NOTE:

In an SVF, interface-based ARP rate limiting cannot be configured on a LI leaf switch.

Perform the following steps on the gateway.

Procedure

  1. Run system-view

    The system view is displayed.

  2. (Optional) Run interface interface-type interface-number

    The interface view is displayed.

    Or run vlan vlan-id

    The VLAN view is displayed.

    If you configure rate limiting on ARP packets in the system view, skip the preceding step.

  3. Run arp anti-attack rate-limit limit

    The maximum rate of ARP packets is set.

    By default, the CE5800 (excluding the CE5880EI) sets the global ARP rate limit to 128 pps. That is, it allows a maximum of 128 ARP packets to pass per second. The default global ARP rate limit on other models is 0. That is, they do not limit the global rate of ARP packets. The default ARP rate limit in a VLAN or on an interface of all models is 0. That is, all models do not limit the ARP rate in a VLAN or on an interface.

  4. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074765

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