Table of Contents

Chapter 1 Auto Detect Configuration Commands. 1-1

1.1 Auto Detect Configuration Commands. 1-1

1.1.1 detect-group. 1-1

1.1.2 detect-list 1-1

1.1.3 display detect-group. 1-2

1.1.4 option. 1-4

1.1.5 retry. 1-5

1.1.6 timer loop. 1-5

1.1.7 timer wait 1-6

Chapter 2 Commands for Auto Detect Implementation. 2-1

2.1 Commands for Auto Detect Implementation. 2-1

2.1.1 ip route-static. 2-1

2.1.2 standby detect-group. 2-2

2.1.3 vrrp vrid track detect-group. 2-3

 

Chapter 1  Auto Detect Configuration Commands

1.1  Auto Detect Configuration Commands

1.1.1  detect-group

Syntax

detect-group group-number

undo detect-group group-number

View

System view

Parameter

group-number: Detecting group number ranging from 1 to 25.

Description

Use the detect-group command to create a detecting group and enter detecting group view.

Use the undo detect-group command to remove a detecting group.

Example

# Create detecting group 10.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10]

1.1.2  detect-list

Syntax

detect-list list-number ip address ip-address [ nexthop ip-address ]

undo detect-list list-number

View

Detecting group view

Parameter

list-number: Sequence number of the IP address to be added to the detecting group. This argument ranges from 1 to 10.

ip address ip-address: Specifies the IP address (in dotted decimal notation) to be detected.

nexthop ip-address: Specifies the next hop IP address.

Description

Use the detect-list command to add an IP address to a detecting group. This command also specifies the order in which the IP addresses in a detecting group are detected.

Use the undo detect-list command to specify to skip a specified IP address when performing auto detect operations.

When performing auto detect operations, a switch detects the IP addresses by their list-number values in an ascending order. Up to 100 IP addresses can be configured in a detecting group. You can specify how the detecting result is generated using the option command.

Related command: option.

Example

# Add the IP address of 202.13.1.55 to detecting group 10, with list-number set to 1, the next hop IP address set to 1.2.3.4.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] detect-list 1 ip address 202.13.1.55 nexthop 1.2.3.4

1.1.3  display detect-group

Syntax

display detect-group [ group-number ]

View

Any view

Parameter

group-number: Detecting group number ranging from 1 to 25.

Description

Use the display detect-group command to display the configuration of a specified detecting group or all detecting groups.

Example

# Display the configuration of detecting group 1.

<H3C> display detect-group 1

detect-group 1 :

 detect loop time(s) : 15

   ping wait time(s) : 2

  detect retry times : 2

    detect ip option : and

         group state : not detecting

 register module num : 0

     detect ip count : 1

detect-list  ip address       next hop

1            202.13.1.55      1.2.3.4

Table 1-1 Description on the fields of the display detect-group command

 

1.1.4  option

Syntax

option [ and | or ]

undo option

View

Detecting group view

Parameter

and: Specifies the detecting result is reachable only when all the IP addresses contained in the detecting group are reachable.

or: Specifies the detecting result is reachable if one of the IP addresses contained in the detecting group is reachable.

Description

Use the option command to specify the way to generate detecting results.

Use the undo option command to restore the default way to generate detecting results.

By default, the and keyword is specified.

When a detecting operation is being carried out, the switch detects each IP address contained in the detecting group in an ascending order by the list-number values of the IP addresses.

l           If you specify the and keyword, the switch returns unreachable as the detecting result when the switch fails to ping an IP address contained in the detecting group and stops detecting.

l           If you specify the or keyword, the switch returns reachable as the detecting result if the switch succeeds in pinging an IP address contained in the detecting group and stops detecting.

Example

# Specify the or keyword for detecting group 10.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] option or

1.1.5  retry

Syntax

retry retry-times

undo retry

View

Detecting group view

Parameter

retry-times: Retry times during a detect operation. This argument ranges from 0 to 10 and defaults to 2.

Description

Use the retry command to set the maximum retry times during a detect operation.

Use the undo retry command to restore the default.

Example

# Specify the maximum number of retires to 3 for detecting group 10.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] retry 3

1.1.6  timer loop

Syntax

timer loop seconds

undo timer loop

View

Detecting group view

Parameter

seconds: Detecting interval. This argument ranges form 1 to 86,400 (in seconds) and defaults to 15.

Description

Use the timer loop command to set the detecting interval, that is, the frequency to perform auto detect operations.

Use the undo timer loop command to restore the default.

Example

# Set the detecting interval to 60 seconds for detecting group 10.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] timer loop 60

1.1.7  timer wait

Syntax

timer wait seconds

undo timer wait

View

Detecting group view

Parameter

seconds: Timeout time of detect operations. This argument ranges from 1 to 30 (in seconds) and defaults to 2.

Description

Use the timer wait command to set the timeout time for detect operations.

Use the undo timer wait command to restore the default.

Example

# Set the timeout time to 3 seconds for detecting group 10.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] timer wait 3

 

Chapter 2  Commands for Auto Detect Implementation

 

 

2.1  Commands for Auto Detect Implementation

2.1.1  ip route-static

Syntax

ip route-static ip-address { mask | mask-length } { interface-type interface-number | next-hop } [ preference preference-value ] [ reject | blackhole ] detect-group group-number

undo ip route-static ip-address { mask | mask-length } [ interface-type interface-number | next-hop ] [ preference preference-value ]

View

System view

Parameter

ip-address: IP address in dotted decimal notation.

mask: Subnet mask.

mask-length: Length of the subnet mask, that is, the number of successive bits in the subnet mask whose values are 1.

interface-type: Type of the next hop egress interface.

interface-number: Number of the next hop egress interface.

next-hop: Next hop IP address in dotted decimal notation.

preference-value: Priority of the route. This argument ranges from 1 to 255.

reject: Specifies the route to be unreachable. If you specify this keyword when executing this command, any packet destined for the specified IP address is discarded, and the system informs the source that the destination is unreachable.

blackhole: Specifies the route to be a blackhole route. If you specify this keyword when executing this command, all outbound interfaces of the static route are the Null 0 interfaces regardless of the next hop. In addition, the system discards any packet transmitted along this route without informing the source.

group-number: Detecting group number ranging from 1 to 25.

Description

Use the ip route-static command to configure a static route, whose validity depends on detecting results as follows:

l           The route is valid when the detecting result is reachable.

l           The route is invalid when the detecting result is unreachable.

Use the undo ip route-static command to remove an existing static route.

Example

# Configure a static route to 192.168.0.5/24 with 192.168.0.2 as the next hop. The route is to be enabled when the result of detecting group 10 is reachable.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] ip route-static 192.168.0.5 24 192.168.0.2 detect-group 10

2.1.2  standby detect-group

Syntax

standby detect-group group-number

undo standby detect-group

View

VLAN interface view

Parameter

group-number: Detecting group number ranging from 1 to 25.

Description

Use the standby detect-group command to enable the VLAN interface backup function by using the auto detect function.

Use the undo standby detect-group command to disable the VLAN interface backup function.

You can enable VLAN interface backup function according to auto detecting results in the following ways:

l           Enable the primary interface when the result of the detecting group is reachable.

l           Enable the secondary interface when the result of the detecting group is unreachable.

l           When the link between the primary VLAN interface and the destination comes back up, that is, the result of the detecting group is reachable again, the system enables the primary VLAN interface and shuts down the secondary.

Example

# Specify to enable VLAN interface 2 when the result of detecting group 10 is unreachable.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface vlan-interface 2

[H3C-Vlan-interface2] standby detect-group 10

2.1.3  vrrp vrid track detect-group

Syntax

vrrp vrid virtual-router-id track detect-group group-number [ reduced value-reduced ]

undo vrrp vrid virtual-router-id track detect-group [ group-number ]

View

VLAN interface view

Parameter

virtual-router-id: Virtual router ID ranging from 1 to 255.

group-number: Detecting group number ranging from 1 to 25.

value-reduced: Value by which the priority is to be reduced. This argument ranges from 1 to 255 and defaults to 10.

Description

Use the vrrp vrid command to enable the track function for a VRRP backup group.

Use the undo vrrp vrid command to disable the track function when employing VRRP.

You can control the priority of a VRRP backup group according to the result of a detecting group to enable automatic switch between the primary switch and the secondary switch. That is,

l           Decrease the priority of a backup group when the result of the detecting group is unreachable.

l           Restore the priority of a backup group when the result of the detecting group is reachable.

 

 

Example

# Create detecting group 10 and specify to detect the IP address of 202.12.1.55.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] detect-group 10

[H3C-detect-group-10] detect-list 1 ip address 202.12.1.55

[H3C-detect-group-10] quit

# Specify to decrease the priority of backup group 1 by 20 when the result of detecting group 10 is unreachable.

[H3C] interface vlan-interface 2

[H3C-Vlan-interface2] vrrp vrid 1 track detect-group 10 reduced 20