Does VLAN tagged PAUSE frame exist at VLAN trunk port? In my opinion PAUSE is point-to-point and should not be VLAN tagged. Really appreciate if anyone can confirm this.
VLAN tagged PAUSE frame?
Nov 03, 2006
1 Replies
802.3x pause frames are generated and consumed by the MAC which doesn't know anything about VLANs. So, even on a trunked port, you wouldn't generate a Pause frame with a VLAN tag.
There may be non-standard implementations out there that use a tagged Pause frame to generate a per-priority Pause message but I'm not aware of any at this time. It's also possible that a service provider providing Ethernet service to a customer will treat the Pause frame from the customer as regular data and tag it with the same tag that it uses for all other traffic from the customer. However, in that case, when the Pause frame makes it to the customer device that is supposed to act on it, it will be untagged. This is, again, non-standard behavior as Pause frames are meant to be generated and consumed on a link by link basis.
Anoop
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