09-Security Command Reference

HomeSupportResource CenterReference GuidesCommand ReferencesH3C S12500X-AF & S12500-X & S9800 Switch Series Command References(R27xx)-6W10509-Security Command Reference
15-uRPF commands
Title Size Download
15-uRPF commands 49.26 KB

IPv4 uRPF commands

display ip urpf

Use display ip urpf to display uRPF configuration.

Syntax

In standalone mode:

display ip urpf [ interface interface-type interface-number ] [ slot slot-number ]

In IRF mode:

display ip urpf [ interface interface-type interface-number ] [ chassis chassis-number slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays uRPF configuration for all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays uRPF configuration for all cards. (In IRF mode.)

Examples

# (In standalone mode.) Display uRPF configuration for the specified slot.

<Sysname> display ip urpf slot 1

Global uRPF configuration information(failed):

   Check type: strict

# (In standalone mode.) Display uRPF configuration on the specified interface.

<Sysname> display ip urpf interface vlan-interface 10 slot 1

uRPF configuration information of interface Vlan-interface10(failed):

   Check type: loose

Table 1 Command output

Field

Description

(failed)

The system failed to deliver the uRPF configuration to the forwarding chip because of insufficient chip resources.

This field is not displayed if the delivery is successful.

Check type

uRPF check mode: loose or strict.

 

ip urpf

Use ip urpf to enable uRPF.

Use undo ip urpf to disable uRPF.

Syntax

ip urpf { loose | strict }

undo ip urpf

Default

uRPF is disabled.

Views

System view

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

loose: Enables loose uRPF check. To pass loose uRPF check, the source address of a packet must match the destination address of a FIB entry.

strict: Enables strict uRPF check. To pass strict uRPF check, the source address and receiving interface of a packet must match the destination address and output interface of a FIB entry. You can enable strict uRPF check only in VLAN interface view.

Usage guidelines

uRPF can be deployed on a PE connected to a CE or an ISP, or on a CE.

Configure strict uRPF check for traffic that uses symmetric path and configure loose uRPF check for traffic that uses asymmetric path. A symmetric path exists for a session if the PE uses the same interface to receive upstream traffic and send downstream traffic. The path is asymmetric if the PE uses different interfaces to receive upstream traffic and send downstream traffic.

·     Typically, symmetric path applies to traffic that goes through an ISP's PE interface connected to the CE. You can configure strict uRPF check on the PE interface.

·     Asymmetric path might exist for traffic that goes through a PE interface connected to another ISP. In this case, configure loose uRPF check on the PE interface.

Examples

# Enable strict uRPF check globally.

<Sysname> system-view

[Sysname] ip urpf strict

# Configure loose uRPF check on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ip urpf loose

Related commands

display ip urpf

 

 

  • Cloud & AI
  • InterConnect
  • Intelligent Computing
  • Security
  • SMB Products
  • Intelligent Terminal Products
  • Product Support Services
  • Technical Service Solutions
All Services
  • Resource Center
  • Policy
  • Online Help
All Support
  • Become a Partner
  • Partner Resources
  • Partner Business Management
All Partners
  • Profile
  • News & Events
  • Online Exhibition Center
  • Contact Us
All About Us
新华三官网