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

CLI-based Configuration Guide - Security

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the network management feature supported by the device.
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).
Service Is Abnormal Because the Upstream Interface Is Not Configured as a Trusted Interface

Service Is Abnormal Because the Upstream Interface Is Not Configured as a Trusted Interface

Fault Description

After IPSG is enabled in a VLAN, the hosts in the VLAN cannot access the Internet. Service on the hosts is abnormal.

Procedure

  1. Check whether the upstream interface belongs to the VLAN with IPSG enabled.

    If the upstream interface belongs to the VLAN, configure this interface as the trusted interface; otherwise, the return packets are discarded because they do not match the binding entries. As a result, user service is interrupted.

    As shown in Figure 14-15, Host_1 and Host_2 belong to VLAN 10. IF3 allows the packets of VLAN 10 to pass. The static binding entries are configured on the router for Host_1 and Host_2, and IPSG is enabled in VLAN 10. The hosts can communicate with each other, but cannot access the Internet. Host_1 is used as an example here to describe the fault symptom:
    • Host_1 sends a packet to the Internet. When the packet reaches IF1 of the router, the router detects that the packet matches a binding entry, and forwards it.
    • The Internet returns a packet to Host_1. When the packet reaches IF3, which belongs to VLAN 10, the router detects that the packet does not match any binding entry, and discards the packet.
    Figure 14-15  Service is abnormal because the upstream interface is not configured as a trusted interface

  2. Procedure.
    1. Run the system-view command to enter the system view.
    2. Run the dhcp enable command to enable DHCP globally.
    3. Run the dhcp snooping enable command to enable DHCP snooping globally.
    4. Run the interface interface-type interface-number command to enter the IF3 interface view.
    5. Run the dhcp snooping trusted command to configure IF3 as a trusted interface.
Translation
Download
Updated: 2019-05-20

Document ID: EDOC1100034077

Views: 112985

Downloads: 208

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