Difference between revisions of "IPv6 Router Advertisements"

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= Receiving Router Advertisements =
 
= Receiving Router Advertisements =
  
To receive and accept RAs on an interface, you need to enable it via sysctl with the following command:
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To receive and accept RAs on an interface, you need to enable it via sysctl with the following command (as root):
  
 
<pre>
 
<pre>
 
sysctl -w net.ipv6.conf.eth0.accept_ra=2
 
sysctl -w net.ipv6.conf.eth0.accept_ra=2
 
</pre>
 
</pre>
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 +
The change is not reboot-persistent, so it either needs to be redone every time or added to rc.d.
  
 
[[ Category:User_documentation ]]
 
[[ Category:User_documentation ]]

Revision as of 00:29, 28 March 2017

Router Advertisements

Router advertisements are described in https://tools.ietf.org/html/rfc4861#section-4.2 .

Supported interface types:

  • bonding
  • bridge
  • ethernet
  • l2tpv3
  • openvpn
  • psuedo-ethernet
  • tunnel
  • vxlan
  • wireless
  • wirelessmodem

To enable or disable, use

set interfaces <interface> ipv6 router-advert send-advert <true or false>

To set the options described in "Router Advertisement Message Format", start from

set interfaces <interface> ipv6 router-advert

With sub-options:

RFC Field VyOS Config Option
Cur Hop Limit cur-hop-limit
"Managed address configuration" flag managed-flag
"Other configuration" flag other-config-flag
Router Lifetime default-lifetime
Reachable Time reachable-time
Retrans Timer retrans-timer
MTU link-mtu
Prefix Information See below

Prefix Information

Prefix information is described in https://tools.ietf.org/html/rfc4861#section-4.6.2

To set the fields described, start from

set interfaces <interface> ipv6 router-advert prefix <h:h:h:h:h:h:h:h/x>

With sub-options:

RFC Field VyOS Config Option
Prefix Length 'x' in <h:h:h:h:h:h:h:h/x>
on-link flag on-link-flag
autonomous address-configuration flag autonomous-flag
Valid Lifetime valid-lifetime
Preferred Lifetime preferred-lifetime


Miscellaneous Options

Starting from

set interfaces <interface> ipv6 router-advert

There are the following additional options:

Receiving Router Advertisements

To receive and accept RAs on an interface, you need to enable it via sysctl with the following command (as root):

sysctl -w net.ipv6.conf.eth0.accept_ra=2

The change is not reboot-persistent, so it either needs to be redone every time or added to rc.d.