Contents

WLAN IP snooping commands· 1

client ip-snooping http-learning enable· 1

client ipv4-snooping arp-learning enable· 1

client ipv4-snooping dhcp-learning enable· 2

client ipv4-snooping dhcp-learning timeout 2

client ipv6-snooping dhcpv6-learning enable· 3

client ipv6-snooping nd-learning enable· 4

wlan client ip-conflict-detection enable· 4

 

WLAN IP snooping commands

client ip-snooping http-learning enable

Use client ip-snooping http-learning enable to enable snooping HTTP and HTTPS requests redirected to the portal server.

Use undo client ip-snooping http-learning enable to disable snooping HTTP and HTTPS requests redirected to the portal server.

Syntax

client ip-snooping http-learning enable

undo client ip-snooping http-learning enable

Default

Snooping HTTP and HTTPS requests is disabled.

Views

Service template view

Predefined user roles

network-admin

Usage guidelines

An AC can use this method to learn IP addresses of clients performing portal authentication. For more information about portal authentication, see User Access and Authentication Configuration Guide.

The priorities for learning IP addresses through snooping DHCP packets, ARP packets, and HTTP/HTTPS requests are in descending order.

Make sure the service template is disabled when you execute this command.

Examples

# Enable snooping HTTP and HTTPS requests.

<Sysname> system-view

[Sysname] wlan service-template service1

[Sysname-wlan-st-service1] client ip-snooping http-learning enable

client ipv4-snooping arp-learning enable

Use client ipv4-snooping arp-learning enable to enable snooping ARP packets.

Use undo client ipv4-snooping arp-learning enable to disable snooping ARP packets.

Syntax

client ipv4-snooping arp-learning enable

undo client ipv4-snooping arp-learning enable

Default

Snooping ARP packets is enabled.

Views

Service template view

Predefined user roles

network-admin

Examples

# Disable snooping ARP packets.

<Sysname> system-view

[Sysname] wlan service-template service1

[Sysname-wlan-st-service1] undo client ipv4-snooping arp-learning enable

client ipv4-snooping dhcp-learning enable

Use client ipv4-snooping dhcp-learning enable to enable snooping DHCPv4 packets.

Use undo client ipv4-snooping dhcp-learning enable to disable snooping DHCPv4 packets.

Syntax

client ipv4-snooping dhcp-learning enable

undo client ipv4-snooping dhcp-learning enable

Default

Snooping DHCPv4 packets is enabled.

Views

Service template view

Predefined user roles

network-admin

Examples

# Disable snooping DHCPv4 packets.

<Sysname> system-view

[Sysname] wlan service-template service1

[Sysname-wlan-st-service1] undo client ipv4-snooping dhcp-learning enable

client ipv4-snooping dhcp-learning timeout

Use client ipv4-snooping dhcp-learning timeout to enable forced logoff of clients that fail to obtain an IPv4 address through DHCP within the specified timeout.

Use undo client ipv4-snooping dhcp-learning timeout to disable forced logoff of clients that fail to obtain an IPv4 address through DHCP.

Syntax

client ipv4-snooping dhcp-learning timeout value

undo client ipv4-snooping dhcp-learning timeout

Default

Forced logoff of clients that fail to obtain an IPv4 address through DHCP is disabled.

Views

Service template view

Predefined user roles

network-admin

Parameters

value: Specifies the timeout in the range of 1 to 600 seconds.

Usage guidelines

This command takes effect only on clients that come online from the AC after the command execution.

Examples

# Enable forced logoff of clients that fail to obtain an IPv4 address through DHCP and set the timeout to 180 seconds.

<Sysname> system-view

[Sysname] wlan service-template 1

[Sysname-wlan-st-1] client ipv4-snooping dhcp-learning timeout 180

client ipv6-snooping dhcpv6-learning enable

Use client ipv6-snooping dhcpv6-learning enable to enable snooping DHCPv6 packets.

Use undo client ipv6-snooping dhcpv6-learning enable to disable snooping DHCPv6 packets.

Syntax

client ipv6-snooping dhcpv6-learning enable

undo client ipv6-snooping dhcpv6-learning enable

Default

Snooping DHCPv6 packets is disabled.

Views

Service template view

Predefined user roles

network-admin

Usage guidelines

APs can learn clients' IPv6 addresses by snooping DHCPv6 packets. The APs then record client IPv6 address and MAC address as WLAN IP snooping binding entries and synchronize the entries to the AC.

The entries will be used for 802.1X and MAC authentication accounting and IP Source Guard. For more information about IP Source Guard, see Security Configuration Guide.

Examples

# Enable snooping DHCPv6 packets.

<Sysname> system-view

[Sysname] wlan service-template service1

[Sysname-wlan-st-service1] client ipv6-snooping dhcpv6-learning enable

client ipv6-snooping nd-learning enable

Use client ipv6-snooping nd-learning enable to enable snooping ND packets.

Use undo client ipv6-snooping nd-learning enable to disable snooping ND packets.

Syntax

client ipv6-snooping nd-learning enable

undo client ipv6-snooping nd-learning enable

Default

Snooping ND packets is disabled.

Views

Service template view

Predefined user roles

network-admin

Usage guidelines

APs can learn clients' IPv6 addresses by snooping ND packets. The APs then record client IPv6 address and MAC address as WLAN IP snooping binding entries and synchronize the entries to the AC.

The entries will be used for 802.1X and MAC authentication accounting and IP Source Guard. For more information about IP Source Guard, see Security Configuration Guide.

Examples

# Disable snooping ND packets.

<Sysname> system-view

[Sysname] wlan service-template service1

[Sysname-wlan-st-service1] undo client ipv6-snooping nd-learning enable

wlan client ip-conflict-detection enable

Use wlan client ip-conflict-detection enable to enable IP address conflict detection.

Use undo wlan client ip-conflict-detection enable to disable IP address conflict detection.

Syntax

wlan client ip-conflict-detection enable

undo wlan client ip-conflict-detection enable

Default

IP address conflict detection is enabled.

Views

Service template view

Predefined user roles

network-admin

Usage guidelines

This feature enables the system to detect IP address conflicts between a client attempting to come online and online clients. The system logs off the online clients that use the same IP address as the new client and creates IP address conflict entries for the clients. The system deletes the IP address conflict entry for a client when the client cache expires or the client's IP address changes.

In an AC hierarchy network, you can disable IP address conflict detection on the central AC if portal authentication has been disabled or accounting has been disabled for 802.1X or MAC authentication clients. This allows clients from different local ACs to come online with the same IP address, simplifying DHCP configuration.

Examples

# Disable IP address conflict detection.

<Sysname> system

[Sysname] undo wlan client ip-conflict enable

Related commands

client cache aging-time (WLAN Access Command Reference)