I've been beating my head against this for a while since I've only
encountered this issue with our Extreme switches and none of our other brands.
For the life of me, I cannot get traffic to move through on the default vlan from our other switches.
I can trunk vlan 1 across on any other switch between them using the standard trunk mode (tagged), but on the Extremes (We have a Black Diamond X8 and numerous x670v, x670g2 and x770s) vlan 1 is blocked.
I've tried leaving the vlan in untagged mode on both sides, tagged mode, and every iteration inbetween.
I can see the default vlan grab an IP address from the DHCP server on that vlan, but it won't push the traffic through beyond that.
Is there some step I'm missing in getting the default vlan to work like any other 802.1q vlan?