B Commands

Available Languages

Download Options

  • PDF     (133.2 KB)
    View with Adobe Reader on a variety of devices
Updated:July 31, 2011

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

B Commands

Table Of Contents

B Commands

backoff

backup-bw

bandwidth (LSP attribute configuration mode)

bandwidth (TE interface configuration mode)

bfd interval

bfd slow-timer


B Commands

This chapter describes the Cisco NX-OS Multiprotocol Label Switching commands that begin with B.

backoff

To configure session setup delay parameters for the Label Distribution Protocol (LDP) backoff mechanism, use the backoff command. To return to the default setting, use the no form of this command.

backoff initial-backoff max-backoff

no backoff

Syntax Description

initial-backoff

Initial backoff value in seconds. The range is from 5 to 2147483.

max-backoff

Maximum backoff value in seconds. The range is from 5 to 2147483.


Defaults

None

Command Modes

LDP configuration mode

Supported User Roles

network-admin
vdc-admin

Command History

Release
Modification

5.2(1)

This command was introduced.


Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to setup delay parameters for the LDP backoff mechanism: 

switch(config)# mpls ldp configuration

switch(config-ldp)# backoff 30 240

switch(config-ldp)#

Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).


backup-bw

To specify whether this tunnel-te, when used as a backup tunnel, should provide bandwidth protection, and how much, use the backup-bw command. To restore the system to its default condition, use the no form of this command.

backup-bw bandwidth

no backup-bw

Syntax Description

bandwidth

Amount of allocatable backup bandwidth. The range is from 1 to 4294967295.


Defaults

None

Command Modes

TE interface configuration mode

Supported User Roles

network-admin
vdc-admin

Command History

Release
Modification

5.2(1)

This command was introduced.


Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to associate the bandwidth with a backup tunnel: 

switch# configure terminal

switch(config)# interface tunnel-te 2

switch(config-if-te)# backup-bw 1000

switch(config-if-te)#

Related Commands

Command
Description

interface tunnel-te

Configures the traffic engineering (TE) interface.


bandwidth (LSP attribute configuration mode)

To configure the label switched path (LSP) bandwidth, use the bandwidth command. To restore the system to its default condition, use the no form of this command.

bandwidth kbps

no bandwidth

Syntax Description

kbps

Number of kilobits per second set aside for the path option. The range is from 1 to 4294967295.


Defaults

None

Command Modes

LSP attribute configuration mode

Supported User Roles

network-admin
vdc-admin

Command History

Release
Modification

5.2(1)

This command was introduced.


Usage Guidelines

The following conditions apply for all tunnel engineering (TE) commands that can be specified both in "TE interface configuration mode; path-option command line, or LSP attribute configuration mode:

•If a setting is specified for a label switched path (LSP), either via the path-option command directly or by assigning an LSP attribute list to a path-option, takes this setting precedence for that specific path option.

•If no setting is specified for an LSP, then the LSP/path-option inherits any setting specified in the tunnel-te configuration mode: affinity, auto-bw, priority, record-route, protection/fast-reroute.

The bandwidth command configures the initial tunnel bandwidth, which is adjusted by the auto bandwidth mechanism.

This command requires the MPLS Services license.

Examples

This example shows how to configure the LSP bandwidth: 

switch# configure terminal

switch(config)# mpls traffic-eng configuration

switch(config-te)# lsp attributes 1

switch(config-lsp-attr)# bandwidth 5000

Related Commands

Command
Description

mpls traffic-eng configuration

Configures the Multiprotocol Label Switching (MPLS) Traffic Engineering Protocol (MPLS-TE).


bandwidth (TE interface configuration mode)

To configure the bandwidth for a Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnel, use the bandwidth command. To restore the system to its default condition, use the no form of this command.

bandwidth bandwidth

no bandwidth

Syntax Description

bandwidth

Bandwidth in kilobits per second. The range is from 1 to 4294967295.


Defaults

0

Command Modes

TE interface configuration mode

Supported User Roles

network-admin
vdc-admin

Command History

Release
Modification

5.2(1)

This command was introduced.


Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to configure the bandwidth for a MPLS TE tunnel: 

switch# configure terminal

switch(config)# interface tunnel-te 1

switch(config-if-te)# bandwidth 250

switch(config-if-te)#

Related Commands

Command
Description

interface tunnel-te

Configures the traffic engineering (TE) interface.


bfd interval

To set the Bidirectional Forwarding Detection (BFD) intervals for this interface, use the bfd interval command. To restore the system to its default condition, use the no form of this command.

bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier

no bfd interval

Syntax Description

milliseconds

TX interval in milliseconds, which is the required rate at which control packets can be received. The range is from 50 to 999 milliseconds.

min_rx

Specifies minimum RX interval, which is the desired rate for transmitting control packets. The range is from 50 to 999 milliseconds.

multiplier

Specifies the detect multiplier for BFD sessions.

interval-multiplier

Multiplier interval. The range is from 1 to 50 milliseconds.


Defaults

Interval milliseconds-50

Min_rx_50

Multiplier interval-multiplier-3

Command Modes

Interface configuration mode

Supported User Roles

network-admin
vdc-admin

Command History

Release
Modification

5.2(1)

This command was introduced.


Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to set the BFD intervals: 

switch# configure terminal

switch# configure terminal

switch(config)# interface ethernet 2/2

switch(config-if)# bfd interval 100 min_rx 100 multiplier 4

 
   
 
    
   
 
    
 
   
 
    
   
 
    
 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        

          Command 
        
 		 
        
        

          Description 
        
 		 
      
 
      
 
       
 mpls ldp configuration 
 		 
       
 Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP). 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
     
    
    
   
 bfd slow-timer 
 
    
   
 To configure the slow mode timer for sessions, use the bfd slow-timer command. To restore the system to its default condition, use the no form of this command. 
 
    
   
bfd slow-timer milliseconds 
 
    
   
no bfd slow-timer milliseconds 
 
    
   
 Syntax Description
 
   
 
    
 
      
      
      
 
       
 milliseconds 
 		 
       
 Slow rate timer in milliseconds. The range is from 1000 to 30000 milliseconds. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Defaults 
 
    
   
 None 
 
    
   
 Command Modes 
 
    
   
 Global configuration mode 
 
    
   

     Supported User Roles 
   
 
    
   
 network-admin
vdc-admin 
 
    
   
 Command History
 
   
 
    
 
      
      
      
 
        
        

          Release 
        
 		 
        
        

          Modification 
        
 		 
      
 
      
 
       
 5.2(1) 
 		 
       
 This command was introduced. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Usage Guidelines 
 
    
   
 This command requires the MPLS Services license. 
 
    
   
 Examples 
 
    
   
 This example shows how to configure the slow mode timer for sessions: 
 
    
   
 
    
switch# configure terminal

 
   
 
    
   
 
    
switch(config)# bfd slow-timer 1000

 
   
 
    
   
 
    
switch(config)#

 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        

          Command 
        
 		 
        
        

          Description 
        
 		 
      
 
      
 
       
 mpls ldp configuration 
 		 
       
 Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP). 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
  
 
  
  
 






















     

     
    
    












	

    



    


   
        
            

     
        






































    

    

        

    

    
      

     
			
            

























    
    
    
    









            

                

















  
  

  
    
    
    
    
  






            

        
            
            




















  
Was this Document Helpful?

  
    
    
  
  
      
      FeedbackFeedback
  







            

                

















  
    
  



            


            

                
















    
Contact Cisco