When you have the ipv6 address enabled on a local interface, the higher preference is used for the network next-hop
In the ICMPv6 RA you can validate the preference. Here's a few examples of a pfSense firewall RT-ADV settings and validations
tcpdump output
router preference normal prf plus other goodies to include search list and DNS servers
You can not adjust basic items such as inteval default lifetines, min/max lifetimes, from the webGUI
You can use the online pfSense KB for more information & the differences in the mode ( managed, unmanged, router-only ). Also the tcpdump/tshark output will reflex the bits that are changed and raised in the Router-Advertisements.
https://doc.pfsense.org/index.php/Router_Advertisements
https://en.wikipedia.org/wiki/PfSense
It best to understand the differences of managed , unmanaged, & stateless DHCP,etc.....
Pfsense is one of the coolest opensource network firewall out.
Ken Felix
NSE ( Network Security Expert) and Route/Switching Engineer.
kfelix -----a----t---- socpuppets ---dot---com
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