Copyright 2024 Fsas Technologies Inc
reference
https://www.fujitsu.com/jp/documents/products/network/router/sir/example/internet/internet_jpix_fix1-guide.pdf

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 Si-R config
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ether 1 1 vlan untag 1
ether 1 2 use off
ether 2 1-8 vlan untag 2
lan 0 ip address 192.168.1.254/24 3
lan 0 vlan 2
lan 1 ipv6 use on
lan 1 ipv6 ifid 12:3456:7890:0
lan 1 ipv6 address 0 auto 
lan 1 ipv6 ra mode recv
lan 1 ipv6 ra recv prefix-mode routers
lan 1 ipv6 dhcp service client
lan 1 ipv6 dhcp client option na off
lan 1 vlan 1
remote 0 name internet
remote 0 ap 0 datalink type ip
remote 0 ap 0 tunnel local ra@lan1 
remote 0 ap 0 tunnel remote 2001:db8::1
remote 0 ap 0 tunnel mtu 1500
remote 0 ap 0 v6plus mode enable
remote 0 ap 0 v6plus auth userid userpass
remote 0 ip route 0 default 1 1
remote 0 ip nat mode multi 203.0.113.1 1 5m
remote 0 ip msschange 1420
syslog facility 23
time auto server 0::0 dhcp
time zone 0900
proxydns domain 0 any * any dhcp lan1
consoleinfo autologout 8h
telnetinfo autologout 5m
terminal charset SJIS