I know this is not a nice design, but is this the way to do it when i have to run "switchport access on the Cisco switches.
My question is? Shouldnt vlan 100 be tagged through the fabric inside i-sid 20100. Untagged?
How does this work? I work for the most with Cisco .-)
the fabric does not transport the q-header. The vlan tag is removed on the fabric border/edge in case of the elan.
What you need to choose on the fabric edge (tagged or untagged) depends on the config on the other side. In your case the cisco switch.
Other option could be elan-transparent. Then, the behavior is like a dark-fiber.