Contents

IPv6 fast forwarding commands· 1

display ipv6 fast-forwarding aging-time· 1

display ipv6 fast-forwarding cache· 1

ipv6 fast-forwarding aging-time· 2

ipv6 fast-forwarding enable· 3

ipv6 fast-forwarding load-sharing· 4

reset ipv6 fast-forwarding cache· 4

 

IPv6 fast forwarding commands

display ipv6 fast-forwarding aging-time

Use display ipv6 fast-forwarding aging-time to display the aging time of IPv6 fast forwarding entries.

Syntax

display ipv6 fast-forwarding aging-time

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display the aging time of IPv6 fast forwarding entries.

<Sysname> display ipv6 fast-forwarding aging-time

Aging time: 30s

Table 1 Command output

Field	Description
Aging time	Aging time of IPv6 fast forwarding entries, in seconds.

 

Related commands

ipv6 fast-forwarding aging-time

display ipv6 fast-forwarding cache

Use display ipv6 fast-forwarding cache to display IPv6 fast forwarding entries.

Syntax

display ipv6 fast-forwarding cache [ ipv6-address ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ipv6-address: Specifies an IPv6 address. If you do not specify an IPv6 address, this command displays all IPv6 fast forwarding entries.

slot slot-number: Specifies a card by the slot number. If you do not specify a card, this command displays IPv6 fast forwarding entries for all cards.

Examples

# Display all IPv6 fast forwarding entries.

<Sysname> display ipv6 fast-forwarding cache

Total number of IPv6 fast-forwarding items: 2

Src IP: 2002::1                                        Src port: 129

Dst IP: 2001::1                                        Dst port: 65535

Protocol: 58

VPN instance: N/A

Input interface: GE1/0/2

Output interface: GE1/0/1

 

Src IP: 2001::1                                        Src port: 128

Dst IP: 2002::1                                        Dst port: 0

Protocol: 58

VPN instance: N/A

Input interface: GE1/0/1

Output interface: GE1/0/2

Table 2 Command output

Field	Description
Total number of IPv6 fast-forwarding items	Number of IPv6 fast forwarding entries.
Src IP	Source IPv6 address.
Src port	Source port number.
Dst IP	Destination IPv6 address.
Dst Port	Destination port number.
Protocol	Protocol number.
VPN instance	VPN instance. If the entry does not belong to any VPN instance, this field displays N/A.
Input interface	Interface type and number of the input interface that received the first packet of the data flow. If no interface is involved in fast forwarding, this field displays N/A. If the input interface does not exist, this field displays a hyphen (-).
Output interface	Output interface type and number. If no interface is involved in fast forwarding, this field displays N/A. If the output interface does not exist, this field displays a hyphen (-).

 

Related commands

reset ipv6 fast-forwarding cache

ipv6 fast-forwarding aging-time

Use ipv6 fast-forwarding aging-time to set the aging time for IPv6 fast forwarding entries.

Use undo ipv6 fast-forwarding aging-time to restore the default.

Syntax

ipv6 fast-forwarding aging-time aging-time

undo ipv6 fast-forwarding aging-time

Default

The aging time is 30 seconds.

Views

System view

Predefined user roles

network-admin

Parameters

aging-time: Sets the aging time in the range of 10 to 300 seconds.

Examples

# Set the aging time to 20 seconds for IPv6 fast forwarding entries.

<Sysname> system-view

[Sysname] ipv6 fast-forwarding aging-time 20

Related commands

display ipv6 fast-forwarding aging-time

ipv6 fast-forwarding enable

Use ipv6 fast-forwarding enable to enable IPv6 fast forwarding.

Use undo ipv6 fast-forwarding enable to disable IPv6 fast forwarding.

Syntax

ipv6 fast-forwarding enable

undo ipv6 fast-forwarding enable

Default

IPv6 fast forwarding is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

By default, IPv6 fast forwarding is enabled. The device will generate a large number of IPv6 fast forwarding entries when the traffic volume is high. Excessive fast forwarding entries will cause high memory usage, which eventually leads to memory allocation failure for other services. In this case, you can disable fast forwarding temporarily to release the device memory.

Do not disable IPv6 fast forwarding if the device runs session-based services. Disabling IPv6 fast forwarding will make these services become ineffective:

·     NAT.

·     ASPF.

·     Attack detection and prevention.

Examples

# Disable IPv6 fast forwarding.

<Sysname> system-view

[Sysname] undo ipv6 fast-forwarding enable

Related commands

display ipv6 fast-forwarding cache

reset ipv6 fast-forwarding cache

ipv6 fast-forwarding load-sharing

Use ipv6 fast-forwarding load-sharing to enable IPv6 fast forwarding load sharing.

Use undo ipv6 fast-forwarding load-sharing to disable IPv6 fast forwarding load sharing.

Syntax

ipv6 fast-forwarding load-sharing

undo ipv6 fast-forwarding load-sharing

Default

IPv6 fast forwarding load sharing is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

IPv6 fast forwarding load sharing enables the device to load share packets of the same flow. This feature identifies a data flow by using the packet information.

If IPv6 fast forwarding load sharing is disabled, the device identifies a data flow by the packet information and the input interface. No load sharing is implemented.

Examples

# Enable IPv6 fast forwarding load sharing.

<Sysname> system-Views

[Sysname] ipv6 fast-forwarding load-sharing

reset ipv6 fast-forwarding cache

Use reset ipv6 fast-forwarding cache to clear IPv6 fast forwarding entries.

Syntax

reset ipv6 fast-forwarding cache [ slot slot-number ]

Views

User view

Predefined user roles

network-admin

Parameters

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command clears IPv6 fast forwarding entries for all cards.

Examples

# Clear IPv6 fast forwarding entries.

<Sysname> reset ipv6 fast-forwarding cache

Related commands

display ipv6 fast-forwarding cache