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Home Documentation Junos OS Junos CLI Reference CLI Reference S

Junos CLI Reference

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show ipv6 router-advertisement

date_range 19-Nov-23
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Syntax

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show ipv6 router-advertisement 
<conflicts>
<interface interface>
<logical-system (all | logical-system-name)>
<prefix prefix/prefix length>

Description

Display information about IPv6 router advertisements, including statistics about messages sent and received on interfaces, and information received from advertisements from other routers.

The router advertisement module does not function in the backup Routing Engine as the Routing Engine does not send an acknowledgment message after receiving the packets. Starting in Junos OS Release 22.2R1, you can view the router advertisement module information using the show ipv6 router-advertisement operational command.

Options

none

Display all IPv6 router advertisement information for all interfaces.

conflicts

(Optional) Display only the IPv6 router advertisement information that is conflicting.

interface interface

(Optional) Display IPv6 router advertisement information for the specified interface.

logical-system (all | logical-system-name)

(Optional) Perform this operation on all logical systems or on a particular logical system.

prefix prefix/prefix length

(Optional) Display IPv6 router advertisement information for the specified prefix.

Additional Information

The display identifies conflicting information by enclosing the value the router is advertising in brackets.

Required Privilege Level

view

Output Fields

Table 1 describes the output fields for the show ipv6 router-advertisement command. Output fields are listed in the approximate order in which they appear.

Table 1: show ipv6 router-advertisement Output Fields

Field Name

Field Description

Interface

Name of the interface.

Advertisements sent

Number of router advertisements sent and the elapsed time since they were sent.

Solicits received

Number of solicitation messages received.

Advertisements received

Number of router advertisements received.

Advertisements from

Names of interfaces from which router advertisements have been received and the elapsed time since the last one was received.

Managed

Managed address configuration flag: 0 (stateless) or 1 (stateful).

Other configuration

Other stateful configuration flag: 0 (stateless) or 1 (stateful).

Reachable time

Time that a node identifies a neighbor as reachable after receiving a reachability confirmation, in milliseconds.

Default lifetime

Default lifetime, in seconds: from 0 seconds to 18.2 hours. A setting of 0 indicates that the router is not a default router.

Retransmit timer

Time between retransmitted Neighbor Solicitation messages, in milliseconds.

Current hop limit

Configured current hop limit.

Prefix

Name and length of the prefix.

Valid lifetime

How long the prefix remains valid for onlink determination.

Preferred lifetime

How long the prefix generated by stateless autoconfiguration remains preferred.

On link

Onlink flag: 0 (not onlink) or 1 (onlink).

Autonomous

Autonomous address configuration flag: 0 (not autonomous) or 1  (autonomous).

Upstream Mode

Configured interface as upstream interface for RA proxy

Downstream Mode

Configured interface as downstream interface for RA proxy.

Downstream

Downstream interface for RA proxy.

Passive Mode

RA receive only mode is enabled.

Proxy Blackout Timer

Proxy blackout timer interval is the time interval for which the interface must not be used as a proxy interface. Proxy functionality is disabled on that interface.

Parameter Preference

Preference to select configured or proxied parameters for downstream interface

error

Displays the details of the error.

Sample Output

show ipv6 router-advertisement (with RA and NAT64 IPv6 address prefix) (cSRX Container Firewall, MX Series, SRX Series, vMX, and vSRX Virtual Firewall)

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user@host> show ipv6 router-advertisement    
Interface: ge-0/0/0.0
  Advertisements sent: 3, last sent 00:00:05 ago
  Solicits sent: 1, last sent 00:00:37 ago
  Solicits received: 0
  Advertisements received: 0
  Solicited router advertisement unicast: Disable
  IPv6 RA Preference: DEFAULT/MEDIUM
  Passive mode: Disable
  Upstream mode: Disable
  Downstream mode: Disable
  Proxy blackout timer: Not Running
  NAT prefix: 6000::/96 Lifetime: 8192 sec

show ipv6 router-advertisement

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user@host> show ipv6 router-advertisement    
Interface: fe-0/1/1.0
  Advertisements sent: 0
  Solicits received: 0
  Advertisements received: 0
Interface: fxp0.0
  Advertisements sent: 0
  Solicits received: 0
  Advertisements received: 1
  Advertisement from fe80::2d0:b7ff:fe1e:7b0e, heard 00:00:13 ago
    Managed: 0
    Other configuration: 0 [1]
      Reachable time: 0 ms
      Default lifetime: 1800 sec
      Retransmit timer: 0 ms
      Current hop limit: 64

show ipv6 router-advertisement (Without RA proxy) (SRX Series and vSRX Virtual Firewall 3.0)

(Without RA proxy)

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user@host> show ipv6 router-advertisement    
Interface: ge-0/0/1.0
  Advertisements sent: 7, last sent 00:00:11 ago
  Solicits sent: 1, last sent 00:00:41 ago
  Solicits received: 0
  Advertisements received: 0
  Solicited router advertisement unicast: Disable
  IPv6 RA Preference: DEFAULT/MEDIUM
  Passive mode: Enable
  Upstream mode: Disable
  Downstream mode: Disable
  Proxy blackout timer: Not Running

(With RA proxy)

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Interface: ge-0/0/2.0
  Advertisements sent: 2, last sent 00:00:49 ago
  Solicits sent: 1, last sent 00:01:21 ago
  Solicits received: 0
  Advertisements received: 18
  Solicited router advertisement unicast: Disable
  IPv6 RA Preference: DEFAULT/MEDIUM
  Passive mode: Enable
  Upstream mode: Enable
  Downstream mode: Disable
  Proxy parameter preference: Proxied
  Proxy blackout timer: Not Running
  Downstream: ge-0/0/0.0
  Downstream: ge-0/0/1.0
  Advertisement from fe80::5668:adff:fed8:101b, heard 00:00:00 ago
  Managed: 0
  Other configuration: 1 [0]
  Link MTU: 1500 bytes
  Reachable time: 5555 ms
  Default lifetime: 1799 sec [1800 sec]
  Retransmit timer: 4444 ms
  Current hop limit: 50 [64]
  RDNSS address: abcd:1::1
  Lifetime: 3333 sec
  Prefix: 2002:2:0:2000::/64
  Valid lifetime: 3600 sec
  Preferred lifetime: 2400 sec
  On link: 1
  Autonomous: 1
  Route Information: 2002:2:0:2000::/64
  IPv6 RA Preference: LOW
  Route lifetime: 1111 sec
  DNSSL suffix: juniper.net
  Lifetime: 6666 sec

show ipv6 router-advertisement conflicts

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user@host> show ipv6 router-advertisement conflicts    
Interface: fxp0.0
  Advertisement from fe80::2d0:b7ff:fe1e:7b0e, heard 00:01:08 ago
    Other configuration: 0 [1]

show ipv6 router-advertisement prefix

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user@host> show ipv6 router-advertisement prefix 2001:db8:8040::/16    
Interface: fe-0/1/3.0
  Advertisements sent: 3, last sent 00:04:11 ago
  Solicits received: 0
  Advertisements received: 3
  Advertisement from fe80::290:69ff:fe9a:5403, heard 00:00:05 ago
    Managed: 0
    Other configuration: 0
    Reachable time: 0 ms
    Default lifetime: 180 sec [1800 sec]
    Retransmit timer: 0 ms
    Current hop limit: 64
    Prefix: 2001:db8:8040:1::/64                  
      Valid lifetime: 2592000 sec      
      Preferred lifetime: 604800 sec   
      On link: 1                       
      Autonomous: 1

show ipv6 router-advertisement (Backup Routing Engine)

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user@host> show ipv6 router-advertisement   
error: Module not running (routing)

Release Information

Command introduced before Junos OS Release 7.4.

Starting in Junos OS Release 22.1, we support RA proxy on SRX Series and vSRX Virtual Firewall 3.0 . This command output is modified to display the configured upstream interfaces, downstream interfaces, the proxy flag, the proxy blackout timer, and the passive mode information.

Related Documentation

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