Contents

IPv6 fast forwarding commands· 1

display ipv6 fast-forwarding aging-time· 1

display ipv6 fast-forwarding cache· 1

display ipv6 fast-forwarding fragcache· 3

ipv6 fast-forwarding enable· 4

ipv6 fast-forwarding load-sharing· 5

reset ipv6 fast-forwarding cache· 5

 

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

context-admin

context-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

context-admin

context-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 an IRF member device by its member ID. If you do not specify a member device, this command displays IPv6 fast forwarding entries for all member devices.

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	Input interface type and number. 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

display ipv6 fast-forwarding fragcache

Use display ipv6 fast-forwarding fragcache to display IPv6 fast forwarding entries for fragmented datagrams.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

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

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command displays IPv6 fast forwarding entries for fragmented datagrams on all member devices.

 Examples

# Display IPv6 fast forwarding entries for all fragmented datagrams.

<Sysname> display ipv6 fast-forwarding fragcache

Total number of fragment fast-forwarding entries: 2

Src IP: 18::18                   Src Port: 0

Dst IP: 14::38                   Dst Port: 0

Protocol: 58

Input interface: N/A

ID: 736

Relay flag: 0

 

Src IP: 14::38                   Src Port: 51389

Dst IP: 18::18                   Dst Port: 32768

Protocol: 58

Input interface: XGE2/5/0/29

ID: 774

Relay flag: 0

Table 3 Command output

Field	Description
Total number of fragment fast-forwarding entries	Number of IPv6 fast forwarding entries for fragmented datagrams.
Src IP	Source IPv6 address.
Src port	Source port number.
Dst IP	Destination IPv6 address.
Dst Port	Destination port number.
Protocol	Protocol number.
Input interface	Input interface type and number. 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 (-).
ID	Fragment ID.
Relay_flag	Fragment pass-through flag: ·     0—Not pass through. ·     1—Pass through.

‌

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

context-admin

Usage guidelines

The IPv6 fast forwarding feature will create fast forwarding entries for the device to speed up packet forwarding. When the traffic volume is high, the device will generate a large number of fast forwarding entries. These entries will cause high memory usage, which eventually leads to memory allocation failure for other services. In this case, you can disable this feature temporarily to free up device memory.

Do not disable IPv6 fast forwarding if the device runs session-based services. Disabling 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

context-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 the IPv6 fast forwarding table.

Syntax

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

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command clears the IPv6 fast forwarding table for all member devices.

Examples

# Clear the IPv6 fast forwarding table.

<Sysname> reset ipv6 fast-forwarding cache

Related commands

display ipv6 fast-forwarding cache