I don't think MTU would be the issue.  If the endpoint has a 1500 byte MTU then it will send IP packets up to 1500 bytes long.  IPv6 header is a little longer, but that means the data portion will just have to be a little shorter.  So if you had an MTU issue with v6 you'd have an MTU issue with v4 also.

On 2/14/2021 5:27 PM, Steve Jones wrote:
The ip6 traffic is encapsulated in the vlan? Ip6 headers I'm assuming are larger because the number itself is longer, mtu. But I'm just now learning to use vlans and I lick the tasty windows so I dont know a lot

On Sun, Feb 14, 2021, 3:00 PM Adam Moffett <dmmoff...@gmail.com <mailto:dmmoff...@gmail.com>> wrote:

    Unless you've defined it as a protocol based VLAN then no it
    shouldn't
    matter.


    On 2/14/2021 3:12 PM, Nate Burke wrote:
    > I have a P2P circuit plugged into a CRS317-1G-16S+ and setting
    > PVID3000 on that bridge interface.  A Mikrotik CCR1009 is plugged
    > into another port on the CRS317 set for trunked VLan3000.  I can
    move
    > IPv4 traffic on Vlan3000 and to the other end of the P2P circuit
    just
    > fine, but I cannot move any IPv6 traffic on Vlan3000.
    >
    > The Vlan shouldn't care about IP4 vs IP6 traffic, right? I just
    want
    > to make sure I'm not causing my own problem before pointing my
    finger
    > at the Circuit.
    >
    > The IPv6 package is not installed on the CRS317, because it's just
    > acting as a switch, it's not doing any routing.  That shouldn't
    > matter, right?
    >

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