Re: [ippm] Comment on draft-ietf-ippm-ioam-ipv6-options-00

[<[e-mail]>]

Hi Frank,






Now I understand the intention behind the text, you might need to rephrase the text, when it says "a router MUST drop packets..." it really means "an IOAM capable router MUST drop packets...".


BTW, I didn't see it as a bug from the beginning, I just raised it as an inconsistency between the two drafts for you to clarify.






Best Regards,


Xiao Min



原始邮件



发件人：FrankBrockners(fbrockne) <[e-mail]>
收件人：肖敏10093570;[e-mail] <[e-mail]>;
日 期 ：2019年11月19日 11:47
主 题 ：RE: [ippm] Comment on draft-ietf-ippm-ioam-ipv6-options-00




Hi Xiao,


 


thanks for following up. Apparently the behavior described in draft-ietf-ippm-ioam-ipv6-options-00 isn’t a bug – as we speculated in the IPPM WG meeting yesterday, but the desired behavior that we arrived at after WG discussions in 6man
 and with several IPv6 experts.  See https://github.com/inband-oam/ietf/commit/48175cf89de6369a4d01017ec80c07b34f57f17c#diff-803b63dbe26303f504708318e255d884 (“Don't forward an IOAM packet unless configured to do so.”)


This behavior for IPv6 is to ensure that packets with IOAM do not accidentally leak from a domain that employs IPv6.


This also means for IPv6, things are more constrained than what is stated in the more generic draft-ietf-ippm-ioam-data-08.


 


Cheers, Frank


 


 


 




From: ippm <[e-mail]> On Behalf Of [e-mail]
Sent: Montag, 18. November 2019 13:18
To: [e-mail]
Subject: [ippm] Comment on draft-ietf-ippm-ioam-ipv6-options-00




 

Hi Frank,

 

Repeat what I said on the mic this morning as below.

 

In section 3 of draft-ietf-ippm-ioam-ipv6-options-00 it says:

"Unless a particular interface is explicitly enabled (i.e. explicitly   configured) for IOAM, a router MUST drop packets which contain extension headers carrying IOAM data-fields."

But in section 4.4 of draft-ietf-ippm-ioam-data-08 it says:

"If not all nodes within a domain are IOAM capable, IOAM tracing information (i.e., node data, see below) will only be collected on those nodes which are IOAM capable.  Nodes which are not IOAM capable will forward the packet without any changes to the IOAM-Data-Fields."

It seems they're not in alignment.

 

Best Regards,

Xiao Min