Neighbor Discovery

nv show interface <interface-id> ip neighbor-discovery

Shows ND settings for an interface.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery
                      applied              
--------------------  ---------------------
enable                on                   
mtu                   1500                 
[dnssl]               accounting.nvidia.com
home-agent                                 
  enable              on                   
  lifetime            200                  
  preference          0                    
[prefix]              2001:db8:1::100/32   
[rdnss]               2001:db8:1::100      
router-advertisement                       
  enable              off                  
  fast-retransmit     off                  
  hop-limit           64                   
  interval            600000               
  interval-option     off                  
  lifetime            1800                 
  managed-config      off                  
  other-config        off                  
  reachable-time      0                    
  retransmit-time     0                    
  router-preference   medium

nv show interface <interface-id> ip neighbor-discovery dnssl

Shows the DNSSLdomain suffixes configured on the specified interface.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery dnssl

nv show interface <interface-id> ip neighbor-discovery dnssl <domain-name-id>

Shows configuration information for the specified DNSSLdomain suffix.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery dnssl accounting.nvidia.com
          applied 
--------  --------
lifetime  infinite

nv show interface <interface-id> ip neighbor-discovery home-agent

Shows Home Agent configuration for an interface, such as the maximum amount of time the router acts as a Home Agent and the router preference.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery home-agent
            applied
----------  -------
enable      on     
lifetime    200    
preference  0

nv show interface <interface-id> ip neighbor-discovery prefix

Shows the ND prefixes for the specified interface.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery prefix

nv show interface <interface-id> ip neighbor-discovery prefix <ipv6-prefix-id>

Shows ND prefix configuration for the specified interface, such as the amount of time the prefix is valid for on-link determination, the amount of time that addresses generated from a prefix remain preferred, and if the specified prefix is configured to use IPv6 autoconfiguration.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery prefix 2001:db8:1::100/32
                    applied   
------------------  ----------
autoconfig          on        
off-link            on        
preferred-lifetime  100000    
router-address      on        
valid-lifetime      2000000000

nv show interface <interface-id> ip neighbor-discovery rdnss

Shows the RDNSS configured on the specified interface.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery rdnss

nv show interface <interface-id> ip neighbor-discovery rdnss <ipv6-address-id>

Shows configuration for the specified RDNSS configured on the specified interface.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery rdnss 2001:db8:1::100
          applied 
--------  --------
lifetime  infinite

nv show interface <interface-id> ip neighbor-discovery router-advertisement

Shows router advertisement configuration for an interface, such as the hop limit value advertised in a router advertisement message, the maximum amount of time that router advertisement messages can exist on the route, the interval at which neighbor solicitation messages retransmit, and if fast transmit mode is on.

Command Syntax

Version History

Introduced in Cumulus Linux 5.1.0

Example

cumulus@switch:~$ nv show interface swp1 ip neighbor-discovery router-advertisement
                   applied
-----------------  -------
enable             off    
fast-retransmit    off    
hop-limit          64     
interval           600000 
interval-option    off    
lifetime           1800   
managed-config     off    
other-config       off    
reachable-time     0      
retransmit-time    0      
router-preference  medium

nv show system global nd

Shows ND settings, such as the neighbor base reachable timer and garbage collection settings.

Version History

Introduced in Cumulus Linux 5.6.0

Example

cumulus@switch:~$ nv show system global nd
                              operational  applied  
----------------------------  -----------  ------- 
base-reachable-time           50           50      
garbage-collection-threshold                               
  effective                   17920                        
  maximum                     20480                        
  minimum                     128           

nv show system global nd garbage-collection-threshold

Shows the ND garbage collection threshold settings.

Version History

Introduced in Cumulus Linux 5.6.0

Example

cumulus@switch:~$ nv show system global nd garbage-collection-threshold
           operational  applied
---------  -----------  -------
effective  35840               
maximum    40960               
minimum    128