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show ipv6 router-advertisement



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.



Display all IPv6 router advertisement information for all interfaces.


(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


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


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 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.


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 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 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


Displays the details of the error.

Sample Output

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

show ipv6 router-advertisement

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

(Without RA proxy)

(With RA proxy)

show ipv6 router-advertisement conflicts

show ipv6 router-advertisement prefix

show ipv6 router-advertisement (Backup Routing Engine)

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 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.