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[Idr] Questions to RFC5512: Encapsulation sub-TLV and Opaque extended community to indicate the Encapsulation protocol?

Linda Dunbar <linda.dunbar@huawei.com> Tue, 26 June 2018 17:56 UTC

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From: Linda Dunbar <linda.dunbar@huawei.com>
To: "idr@ietf.org" <idr@ietf.org>, "pmohapat@cisco.com" <pmohapat@cisco.com>, "erosen@cisco.com" <erosen@cisco.com>
Thread-Topic: Questions to RFC5512: Encapsulation sub-TLV and Opaque extended community to indicate the Encapsulation protocol?
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Date: Tue, 26 Jun 2018 17:56:29 +0000
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Subject: [Idr] Questions to RFC5512: Encapsulation sub-TLV and Opaque extended community to indicate the Encapsulation protocol?
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BGP experts:

If the RFC5512 has "distinguished SAFI value" and "the Encapsulation SAFI". Do those two terms have the same meaning?
The Section 3 of RFC5512 has SAFI value of 7 to represent Encapsulation SAFI.

Does it mean that the "distinguished SAFI value" is just "7" for speaker to advertise its supported Tunnel information?


The Section 4 goes on defining the Tunnel Encapsulation Type (such as L2TPv3 with Type =1; etc), and a list of sub-TLVs, one of the SubTLV is Protocol Type (section 4.2) which can be used to represent the Encapsulation Protocol (i.e. protocol type of data frames carried by the tunnel)

Why need the Opaque extended community to indicate the Encapsulation protocol?

[cid:image001.png@01D40D41.33ACE070]

[cid:image002.png@01D40D41.33ACE070]


Thank you very much.

Linda Dunbar

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