Hello Santosh and authors,
interesting idea to combine VxLAN and BFD - I like it.
But what I do not understand is how VxLAN is supposed to understand that the
inner frame is an IP packet (you refer to RFC7348, not VxLAN-gpe). At least
your draft reads like the packet you propose is
outer-IP, udp, VxLAN-header, inner-IP, udp, BFD
i.e. without any inner Ethernet header. Is the inner Ethernet header kind of
obvious, so you did not mention it? I would expect:
outer-IP, udp, VxLAN-header, inner-Ethernet-header, inner-IP, udp, BFD
if we talk about VxLAN RFC7348.
In section "6. Reception of BFD Packet" you refer to section 4.1 of RFC7348 -
which explicitly talks about the receiving VTEP checking VNI and the MAC of
the inner Ethernet frame. RFC 7348 is not covering the transport of IP
packets, it transports Ethernet frames.
You also the say in section "6":
Since inner IP TTL is set to 1 packet
SHOULD be consumed by VTEP and should not be forwarded further to VM.
Hmm, I would not expect the VTEP to do any such inspection of the inner
frame. If e.g. your VTEP is a switch (TOR) then it would simply forward the
inner L2 frame on some L2 interface.
But maybe I'm missing something?
Regards, Marc
On Mon, 4 May 2015 16:13:54 +0000, Santosh P K wrote:
> Hello All,
> We have submitted new BFD for VXLAN draft Please review and get back to
> us with your comments.
>
> Thanks
> Santosh P K
>
>> -----Original Message-----
>> From: [email protected] [mailto:[email protected]]
>> Sent: Monday, May 04, 2015 9:29 PM
>> To: Basil Saji; Santosh P K; Sudarsan Paragiri Mohan; Santosh P K; Basil
>> Saji;
>> Sudarsan Paragiri Mohan
>> Subject: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt
>>
>>
>> A new version of I-D, draft-spallagatti-bfd-vxlan-00.txt
>> has been successfully submitted by Santosh Pallagatti and posted to the
>> IETF
>> repository.
>>
>> Name: draft-spallagatti-bfd-vxlan
>> Revision: 00
>> Title: BFD for VXLAN
>> Document date: 2015-05-04
>> Group: Individual Submission
>> Pages: 9
>> URL:
>> https://www.ietf.org/internet-drafts/draft-spallagatti-bfd-vxlan-
>> 00.txt
>> Status:
>> https://datatracker.ietf.org/doc/draft-spallagatti-bfd-vxlan/
>> Htmlized: https://tools.ietf.org/html/draft-spallagatti-bfd-vxlan-00
>>
>>
>> Abstract:
>> This document describes use of Bidirectional Forwarding Detection
>> (BFD) protocol for VXLAN . Comments on this draft should be directed
>> to [email protected].
>>
>>
>>
>>
>>
>> Please note that it may take a couple of minutes from the time of
>> submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> The IETF Secretariat
>
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