[OPSAWG]PW Operational Status in RFC 9251
Alexander Vainshtein <Alexander.Vainshtein=40rbbn.com-Tr9gZwTxerDR74oF6e/[email protected]> Sun, 10 Aug 2025 11:26:13 +0000
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Dear authors of RFC 9291<https://datatracker.ietf.org/doc/html/rfc9291>,
I have looked up the standard and found that it presumably mentions Operati=
onal Status of a pseudowire as oper-status without any clarifications and/o=
r references, and, specifically, without any association with various indic=
ators in the PW Status TLV.
This is quite different from RFC 5601<https://datatracker.ietf.org/doc/html=
/rfc5601>, which explicitly provides such linkage as can be seen from the =
quoted text below:
pwOperStatus OBJECT-TYPE
SYNTAX PwOperStatusTC
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the operational status of the PW; it
does not reflect the status of the Customer Edge (CE) bound
interface. It is set to down only if pwNotForwarding,
psnFacingPwRxFault, or psnFacingPwTxFault indications are
set in pwLocalStatus or pwRemoteStatus.
It indicates 'lowerLayerDown' if the only reason for
not being in the 'up' state is that either the outer tunnel
or physical layer of the network side is in the 'down'
state.
All other states are declared based on the description
of the PwOperStatusTC.
"
I wonder whether, from your POV, the quoted definition of the PW Operatonal=
Status is still applicable or not.
Regards, and lots of thanks in advance,
Sasha
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Dear authors of <a =
href=3D"https://datatracker.ietf.org/doc/html/rfc9291">
RFC 9291</a>,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I have looked up th=
e standard and found that it presumably mentions Operational Status of a ps=
eudowire as
</span><span style=3D"font-size:10.0pt;font-family:"Courier New""=
>oper-status</span><span style=3D"font-size:11.0pt"> without any clarificat=
ions and/or references, and, specifically, without any association with var=
ious indicators in the PW Status TLV.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This is quite diffe=
rent from <a href=3D"https://datatracker.ietf.org/doc/html/rfc5601">
RFC 5601</a>, which explicitly provides such linkage as can be seen f=
rom the quoted text below:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> pwOperStatus OBJECT-TYPE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> SYNTAX =
PwOperStatusTC<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> MAX-ACCESS read-only<o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> STATUS =
current<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> DESCRIPTION<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> "This object =
indicates the operational status of the PW; it<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> does not ref=
lect the status of the Customer Edge (CE) bound<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> interface.&n=
bsp; It is set to down only if pwNotForwarding,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> psnFacingPwR=
xFault, or psnFacingPwTxFault indications are<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> set in pwLoc=
alStatus or pwRemoteStatus.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> It indicates=
'lowerLayerDown' if the only reason for<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> not being in=
the 'up' state is that either the outer tunnel<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> or physical =
layer of the network side is in the 'down'<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> state.<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> All other st=
ates are declared based on the description<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> of the PwOpe=
rStatusTC.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
10.0pt;font-family:"Courier New";color:#212529;mso-ligatures:none=
"> "<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I wonder whether, f=
rom your POV, the quoted definition of the PW Operatonal Status is still ap=
plicable or not.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-ligatures:none">=
Regards, and lots of thanks in advance,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-ligatures:none">=
Sasha<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
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<br><br><p style=3D"font-family: Verdana; font-size:10pt; color:#666666;"><=
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#666666;">This e-mail together with any attachments may contain information=
of Ribbon Communications Inc. and its Affiliates that is confidential and/=
or proprietary for the sole use of the intended recipient. Any review, disc=
losure, reliance or distribution by others or forwarding without express pe=
rmission is strictly prohibited. If you are not the intended recipient, ple=
ase notify the sender immediately and then delete all copies, including any=
attachments.
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