13.9. Smart-Link Commands

Command Purpose

Use this command to create a smart-link group and enter smart-link group configuration mode. To destroy the smart-link group, used no form of this command.

Prerequisites

Command Syntax

smart-link group GROUP-ID

no smart-link group (GROUP-ID|all)

Command Mode

Global Config

Default

There is no any smart-link group

Usage

Up to 16 smart-link groups can be created.

Examples

Create a smart-link group with ID 1:

Switch# configure terminal
Switch(config)# smart-link group 1

Related Commands

show smart-link group

Command Purpose

Use this command to enable the switch to relay the smart-link flush packet. To disable relaying the packets, use no form of this command.

Prerequisites

Command Syntax

smart-link relay enable

no smart-link relay enable

Command Mode

Global Config

Default

Relaying the smart-link flush packet is enabled.

Usage

By default, the smart-link flush packet could be flooded. Use the command, “no smart-link relay enable”, to disable the packet flooding to other switches.

Examples

The example shows how to enable smart-link relay:

Switch# configure terminal
Switch(config)# smart-link relay enable

The example shows how to disable smart-link relay:

Switch# configure terminal
Switch(config)# no smart-link relay enable

Related Commands

None

Command Purpose

Use this command to set master or slave member interface of the smart-link group. To unset the member, uses the no form of this command.

Prerequisites

Command Syntax

interface (IFPHYSICAL|IFAGG) (master|slave)

no interface (master|slave|all)

Command Mode

Smart-link Configuration

Default

There is no any interface member in the smart-link group by default.

Usage

Every smart-link group has two member interfaces, master and slave. The interfaces should be physical (i.e. eth-0-1) or aggregator (i.e. gg1) switch interface.

STP must be disabled in the smart-link interfaces first.

Examples

This example shows how to set interfaces eth-0-9 and eth-0-13 as the member interfaces of smart-link group 1:

Switch# configure terminal
Switch(config)# interface eth-0-9
Switch(config-if)# spanning-tree port disable
Switch(config-if)# exit
Switch(config)# interface eth-0-13
Switch(config-if)# spanning-tree port disable
Switch(config-if)# exit
Switch(config)# smart-link group 1
Switch(config-smlk-group)# interface eth-0-9 master
Switch(config-smlk-group)# interface eth-0-13 slave
Switch(config-smlk-group)# end

Display the smart link group just created:

Switch# show smart-link group 1
Smart-link group 1 information:
The smart-link group was disabled.
 ============================================================
Auto-restore:
state time count Last-time
disabled 60 0 N/A
 ============================================================
Protected instance:
Load balance instance:
 ============================================================
INTERFACE:
Role Member DownCount Last-Down-Time FlushCount Last-Flush-Time
MASTER eth-0-9 0 N/A 0 N/A
SLAVE eth-0-13 0 N/A 0 N/A

Related Commands

show smart-link group

Command Purpose

Use this command to set protected MSTP instance to the smart-link group.

Use the no form of this command to unset protected MSTP instance.

Prerequisites

Command Syntax

protected mstp instance INSTANCE-ID

no protected mstp instance (all|INSTANCE-ID)

Command Mode

Smart-link Configuration

Default

There is no protected MSTP instance in the smart-link group by default.

Usage

The smart-link groups only protect these VLANs in the protected MSTP instances. The smart-link group can’t be enabled if no protected instance is configured. To protect those VLANs which are not bound with MSTP instance, use the command “protected MSTP instance 0”.

NOTE: If the MTSP instance is removed, it will be removed from smart-link group at the same time.

Examples

This example shows how to set MSTP instance 0, 10 and 100 to the smart-link group 1:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# protected mstp instance 0
Switch(config-smlk-group)# protected mstp instance 10
Switch(config-smlk-group)# protected mstp instance 100
Switch(config-smlk-group)# end

Switch# show smart-link group 1
Smart-link group 1 information:
The smart-link group was disabled.
 ============================================================
Auto-restore:
state time count Last-time
disabled 60 0 N/A
 ============================================================
Protected instance: 0 100 10
Load balance instance:
 ============================================================
INTERFACE:
Role Member DownCount Last-Down-Time FlushCount Last-Flush-Time
MASTER eth-0-9 0 N/A 0 N/A
SLAVE eth-0-13 0 N/A 0 N/A

Related Commands

show smart-link group

Command Purpose

Use this command to set load-balancing instance to the smart-link group.

Use this command to unset load-balancing instance.

Prerequisites

Command Syntax

load-balance instance INSTANCE-ID

no load-balance instance (all|INSTANCE-ID)

Command Mode

Smart-link Configuration

Default

There is no load-balancing instance in the smart-link group by default.

Usage

Load-balancing instances will be active in the slave interface. If user want to configure load-balancing instances, should before the smart-group is enabled.

Examples

This example shows how to set protected instance 10 as the load-balancing instance:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# load-balance instance 10

Related Commands

show smart-link group

Command Purpose

Use this command to set restore time of the smart-link group.

Use the no form of this command to restore the default value.

Prerequisites

Command Syntax

restore time RESTORE-TIME

no restore time

Command Mode

Smart-link Configuration

Default

The default restore time is 60 seconds.

Usage

When the master interface is resumed, the links will not be immediately restored to the master interface, but will be delayed a while. The delay time is called restore time.

Examples

This example shows how to set restore time as 30 seconds in the smart-link group 1:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# restore time 30

Related Commands

show smart-link group

Command Purpose

Use this command to enable/disable restoring feature of the smart-link group.

Prerequisites

Command Syntax

restore enable

no restore enable

Command Mode

Smart-link Configuration

Default

The restoring feature of the smart-link group is disabled by default.

Usage

When master interface fails, the link will be switched to the slave interface. Then, if master interface is resumed, the link will not be switched back to keep the flow stable by default. If restoring feature is enabled, the link will be switched back.

NOTE: If load-balancing instance is configured, this feature is recommended strongly.

Examples

This example shows how to enable the restoring feature in the smart-link group 1:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# restore enable

Related Commands

show smart-link group

Command Purpose

Use this command to set/unset the flush packet sender in the smart-link group.

Prerequisites

Command Syntax

flush send control-vlan VLAN-ID (password simple PASSWORD| )

no flush send

Command Mode

Smart-link Configuration

Default

There is no flush sender in the smart-link group by default.

Usage

Mac address-table should be updated when a master (forwarding) link goes down and the slave link begins forwarding traffic. Flush packet is used for this purpose.

NOTE: If the control-vlan is not existed in the switch, sending flush packet will fail.

Examples

This example shows how to configure flush sender of the smart-link group 1, control-vlan is 4 and password is “test”:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# flush send control-vlan 4 password simple test

Related Commands

show smart-link group

smart-link flush receive

Command Purpose

Use this command to enable/disable the smart-link group.

Prerequisites

Command Syntax

group enable

no group enable

Command Mode

Smart-link Configuration

Default

Smart-link group is disabled by default.

Usage

After interface and protected instance configuration is finished, this command could be used to enable the group.

Examples

This example shows how to enable the smart-link group 1:

Switch# configure terminal
Switch(config)# smart-link group 1
Switch(config-smlk-group)# group enable

Related Commands

show smart-link group

Command Purpose

Use this command to set/unset the flush packet receiver in the switch interface.

Prerequisites

Command Syntax

smart-link flush receive control-vlan VLAN_LIST (password simple PASSWORD| ) (vpls-notify| )

no smart-link flush receive (control-vlan VLAN_LIST| )

Command Mode

Interface Configuration

Default

There is no flush receiver by default.

Usage

The received flush packet should have the same VLAN-ID and password with the sender. Otherwise, the packet will be discarded.

Examples

This example shows how to configure flush receiver in the interface eth-0-9, control-vlan is 4 and password is “test”:

Switch# configure terminal
Switch(config)# interface eth-0-9
Switch(config-if)# smart-link flush receive control-vlan 4 password simple test
Switch(config-if)# end

Switch# show smart-link
Relay smart-link flush packet is enabled
Smart-link received flush packet number:0
Smart-link processed flush packet number:0
Smart link Group Number is 1.
Group-ID State MASTER SLAVE
1 disabled N/A N/A

Related Commands

flush send

show smart-link

Command Purpose

Use this command to enable smart link TCN. To disable the smart-link TCN, used no form of this command.

Prerequisites

Command Syntax

smart-link tcn enable

no smart-link tcn enable

Command Mode

Global Config

Default

Disable

Usage

None

Examples

Switch# configure terminal
Switch(config)# no smart-link tcn enable

Switch# configure terminal
Switch(config)# smart-link tcn enable

Related Commands

show smart-link

Command Purpose

Use this command to set smart link TCN query count. To reset the smart-link TCN query count to default value, used no form of this command.

Prerequisites

Command Syntax

smart-link tcn query-count QUERY-COUNT

no smart-link tcn query-count

Command Mode

Global Config

Default

2

Usage

None

Examples

This example shows how to set smart link TCN query count to 5:

Switch# configure terminal
Switch(config)# smart-link tcn query-count 5

Related Commands

show smart-link

Command Purpose

Use this command to set smart link TCN query interval. To reset the smart-link TCN query interval to default value, used no form of this command.

Prerequisites

Command Syntax

smart-link tcn query-interval QUERY-INTERVAL

no smart-link tcn query-interval

Command Mode

Global Config

Default

10s

Usage

None

Examples

This example shows how to set smart link TCN query interval to 50:

Switch# configure terminal
Switch(config)# smart-link tcn query-interval 50

Switch# configure terminal
Switch(config)# no smart-link tcn query-interval

Related Commands

show smart-link

Command Purpose

Use this command to display information of all smart-link groups.

Prerequisites

Command Syntax

show smart-link

Command Mode

Privileged EXEC

Default

None

Usage

This command is used to display summary information of Smart-link group status, including received flush packet, processed flush packet and current Smart-link group number, etc.

Examples

Switch# show smart-link
Relay smart-link flush packet is enabled
Smart-link received flush packet number:7
Smart-link processed flush packet number:0
Smart link Group Number is 1.
Group-ID State MASTER SLAVE
1 enabled eth-0-1 eth-0-2

Related Commands

None

Command Purpose

Use this command to display detailed information of all smart-link groups or a specific group.

Prerequisites

Command Syntax

show smart-link group (GROUP-ID| )

Command Mode

Privileged EXEC

Default

None

Usage

This command is used to display detail information of a specified Smart-link group or all Smart-link groups’ status.

Examples

Switch# show smart-link group 1

Related Commands

None

Command Purpose

Use this command to clear the statistic of the smart-link groups.

Prerequisites

Command Syntax

clear smart-link statistic

Command Mode

Privileged EXEC

Default

None

Usage

This command is used to clear the statistic of the smart-link groups.

Examples

Switch# clear smart-link statistic

Related Commands

None

Command Purpose

Use this command to debug detail information of smart link.

Prerequisites

Command Syntax

debug smart-link (all|flush|instance|interface|restore)

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

Switch# debug smart-link all

Related Commands

None