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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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Example for Configuring URPF (CE6870EI and CE6875EI)

Example for Configuring URPF (CE6870EI and CE6875EI)

Networking Requirements

As shown in Figure 15-7, the Switch is connected to the Internet Service Provider (ISP) router through 10GE1/0/1 and connected to user networks through 10GE2/0/1. The administrator wants that the Switch can defend against source address spoofing attacks. If the Switch cannot provide this function, unauthorized users will occupy too many service resources by sending valid service requests, and authorized users cannot communicate with each other due to no response.

Figure 15-7 Networking diagram of URPF configuration

Configuration Roadmap

NOTE:

Route symmetry is ensured in this example, so the URPF strict check is used.

Procedure

  1. Configure the URPF check mode.

    <HUAWEI> system-view
    [~HUAWEI] sysname Switch
    [*HUAWEI] commit
    [~Switch] ip urpf strict

  2. Add interfaces to VLANs and assign IP addresses to the VLANIF interfaces.

    [*Switch] vlan batch 10
    [*Switch] interface 10ge 2/0/1
    [*Switch-10GE2/0/1] port link-type access
    [*Switch-10GE2/0/1] port default vlan 10
    [*Switch-10GE2/0/1] quit
    [*Switch] interface vlanif 10
    [*Switch-Vlanif10] ip address 10.164.1.1 255.255.255.0
    [*Switch-Vlanif10] quit
    

  3. Enable URPF on the interface.

    [*Switch] interface vlanif 10
    [*Switch-Vlanif10] ip urpf enable
    [*Switch-Vlanif10] commit
    [~Switch-Vlanif10] quit

  4. Verify the configuration.

    Run the display this command in the system view to check the URPF configuration.

    [~Switch] display this
    #
    ip urpf strict                                                                  
    #                                                                               
    vlan batch 10                                                    
    #   
    

Configuration Files

Switch configuration file

#
sysname Switch
#
ip urpf strict
#                                                                               
vlan batch 10                                                    
#
interface Vlanif10
 ip address 10.164.1.1 255.255.255.0  
 ip urpf enable   
#
interface 10GE2/0/1
 port default vlan 10
#
return
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Updated: 2019-04-20

Document ID: EDOC1100074765

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