Can not get IPv6 prefix on RB5009 only (CCR2004, RB4011 work)

RouterOS RouterOS beta
1

That is really curious and maybe some one has an idea:

Using 7.1rc2 and rc3 I can not get an IPv6 prefix using dhcpv6-client. It’s stuck at searching.
The exact same configuration (export/import) works seamless on a CCR2004 and RB4011!
I even replaced the RB5009 with another one and created a minimal firewall (accept all IPv4/IPv6 packages).

Any idea what is different on the RB5009 to the others?

2

I netinstalled a RB5009 to rc2 and rc3. The problem still exists.
Here is my minimal configuration:

/interface vlan
add interface=ether1 name=FTTH vlan-id=7
    
/interface pppoe-client
add add-default-route=yes interface=FTTH name=TELEKOM user=xxx#0001@t-online.de

/ipv6 dhcp-client
add interface=TELEKOM pool-name=GUA-pool6 request=prefix use-peer-dns=no

The dhcpv6-client stucks at “searching”. Happens only on RB5009, not on RB4011 and CCR2004 in the same environment. This also worked for years on ROS6.
Searching the forum there are reports from others having the same problem. Some gave up, one user reported a solution by changing the HW to RB4011.

v7.1rc3 [development] is released!
3

I have the same issue (http://forum.mikrotik.com/t/issue-with-rb5009-ros-v7-1rc1-dhcpv6-pd-over-pppoe-on-tagged-ethernet-link/151407/1).
It only happens when running pppoe over a tagged vlan. It works on an untagged link.

4

Hi noradtux,

very nice, thank you so much!

I created a bridge in my CRS317 that tags the traffic. It worked right away.
Now I update my support request and come back, if I receive any information.

5

Hello noradtux and dksoft,

I got my RB5009 this week and installed 7.1rc4 on it and decided to test PPPoE over tagged vlan, for my surprise it worked.

I do have a switch between the RB5009 and the Fiber ONT, but still tagged.

My config is below, (have we configured something differently?):

# sep/21/2021 19:50:42 by RouterOS 7.1rc4
# model = RB5009UG+S+
/interface bridge
add ingress-filtering=no name=bridge vlan-filtering=yes
/interface vlan
add interface=bridge mtu=1600 name=WAN_vlan vlan-id=35
/interface pppoe-client
add add-default-route=yes interface=WAN_vlan name=PPPoEv4 user=*****
add interface=WAN_vlan name=PPPoEv6 user=*****
/interface bridge port
add bridge=bridge ingress-filtering=no interface=ether8 pvid=88
/interface bridge vlan
add bridge=bridge tagged=bridge,ether8 vlan-ids=35
/ipv6 dhcp-client
add add-default-route=yes interface=PPPoEv6 pool-name=GUA-pool rapid-commit=\
    no request=prefix use-peer-dns=no