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ietf-wg-masque / draft-ietf-masque-connect-ethernet

MASQUE for Ethernet
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Special considerations for VLANs #8

Closed asedeno closed 2 months ago

asedeno commented 7 months ago

Another PWE3-related topic.

https://www.rfc-editor.org/rfc/rfc4448.html#section-4 describes several modes for encapsulating Ethernet over MPLS. Among those are

https://www.rfc-editor.org/rfc/rfc4448.html#section-4.4.1 compares Raw Mode and Tagged mode.

The distinguishing feature is the handling of VLAN tags, specifically service-delimiting tags set by the service provider.

In raw mode, service-delimiting tags are stripped prior to encapsulation, and other VLAN tags are ignored and transmitted as is. In tagged mode, service-delimiting tags are not stripped, may need to be added if absent, and are processed by the endpoints.

Presently, this draft does not consider VLAN tags, and operates in something closer to raw mode, delegating any details related to VLAN tags up to the user. Do we need to provide any special consideration for VLAN tagging here, or is this delegation sufficient?

asedeno commented 5 months ago

I'm going to add text to the effect of: we'll blindly carry VLAN tags as part of Ethernet frames, but recommend avoiding carrying VLAN-tagged frames and using separate connect-ethernet connections for each VLAN.