Hello @all,

Below is my router product - version 6.46.2 (stable):
https://mikrotik.com/product/hex_s
Fiber module in SFP port is: sercom fgs202 (optical fiber)
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Everything work/run perfectly with IPV4 (ipv4 dhcp client get a wan/public adress very quickly across a vlan over the sfp1 module).
Also all my lan devices are running like a charm behind the router.
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Now i'm trying to setup IPV6 dhcp client but it still remain in searching... status
i have activated the "ipv6" package in package list then rebooted the router.

Below is my IPV6 setup configuration trying to get a wan/ipv6 adress from my internet provider.
(i also confim that with my internet provider box i can get a wan ipv6 adress easily).


1. /ipv6 firewall filter add chain=input action=accept (ipv6 firewall IN opened for testing)
2. /ipv6 firewall filter add chain=output action=accept (ipv6 firewall OUT opened for testing)
3. /ipv6 settings set accept-router-advertisements=yes
4. /interface vlan add interface=Sfp1 loop-protect-disable-time=00:05:00 loop-protect-send-interval=00:00:05 name=VLAN123 vlan-id=123 (vlan anonymised) real work fine with ipv4.
5. /ipv6 dhcp-client option add code=16 name=class-identifier value=0x123456789abcdef (anonymised) real value work on ipv4
/ipv6 dhcp-client option add code=15 name=userclass value=0x123456789abcdef (anonymised) real value work on ipv4
6. /ipv6 dhcp-client option add code=11 name=authsend value=0x123456789abcdef (anonymised) real value work on ipv4
7. /ipv6 dhcp-client add interface=VLAN123 dhcp-options=authsend,userclass,class-identifier request=prefix pool-name=pool_FT_6 pool-prefix-length=64 add-default-route=yes

Then i check IPV6 dhcp client but it still remain in searching... status
Also it seems that no packets go out from the router IPV6 dhcp client

I also have a SFP/RJ45 module, i swaped the optical fiber module with it.
Then i directly connected a cable between the router (sfp/rj45 module installed) to my linux laptop computer running wireshark.
No traffic come to my laptop no UDP packets reached my wireshark laptop !!
(when i make similar test with IPV4 i can see the dhcp request reaching my wireshark laptop computer).

I don't know if i'm missing a main point of configuration? as no traffic go out from my IPV6 dhcp client.
Also it's why it always remain in searching... status

Any help will be appreciated.

Regards.

Can you show me your config ....

Thx
Chris

I finally succeded to get the "bound" status on the ipv6 dhcp-client and also got a prefix from my ISP.
The main issue was related to a specific dhcp config needed for "dhcp sollicit" packets sent by the router.