No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

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.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Disabling an Interface from Learning ARP Entries

Disabling an Interface from Learning ARP Entries

Context

If a user host connected to an interface initiates an ARP attack, ARP resources of the device may be exhausted. When a large number of dynamic ARP entries have been learned by an interface, disable the interface from learning more ARP entries on the gateway to ensure device security.

After dynamic ARP entry learning is disabled on an interface, the system will not automatically delete the ARP entries that were learned previously on this interface. Delete or retain these dynamic ARP entries as required.

If dynamic ARP entry learning is disabled on an interface, traffic forwarding may fail on this interface.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run arp learning disable

    The interface is disabled from learning ARP entries.

    By default, an interface learns ARP entries dynamically.

  5. Run commit

    The configuration is committed.

Translation
Download
Updated: 2019-04-20

Document ID: EDOC1100074765

Views: 18830

Downloads: 64

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next