答复: Methods to label the passiv e interfaces within ISIS
"Aijun Wang" <[email protected]> Fri, 10 Jan 2020 15:12:12 +0800
| Newsgroups | gmane.ietf.isis |
|---|---|
| Message-ID | <00bb01d5c785$483d91b0$d8b8b510$__41812.5568002992$1578640405$gmane$org@org.cn> |
This is a multi-part message in MIME format. --===============4349624153049146295== Content-Type: multipart/alternative; boundary="----=_NextPart_000_00BC_01D5C7C8.5660D1B0" Content-Language: zh-cn This is a multi-part message in MIME format. ------=_NextPart_000_00BC_01D5C7C8.5660D1B0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi, Tony: =20 Thanks for your suggestions. If the behavior of =E2=80=9Cstub link=E2=80=9D is same as that = =E2=80=9Cpassive interface=E2=80=9D, for example, not sending thing on = that interface, but can receive, we can modify the description later in = the updated version of this draft. For the link attributes that defined in RFC5029, as that stated in = https://tools.ietf.org/html/rfc5029#section-2, this sub-TLV is included = in the TLV 22(Extended IS Reachability).=20 As I read the IANA code point = https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.= xhtml#isis-tlv-codepoints-22-23-25-141-222-223, it notes this sub-TLV = can be included in all of these TLVs (22,23,25,141,222,223).=20 =20 But, when the interface is configured as passive/stub, it seems that the = above TLVs will not be advertised, because there is no IS neighbor on = this passive link. =20 TLV 141 =E2=80=9CInter-AS reachability information=E2=80=9D seems be one = appropriate TLV to include this sub-TLV, but it requires the IS-IS TE = deployment, and is not suitable for describing the passive/stub link on = edge router. =20 In summary, it seems put this attribute into the =E2=80=9CPrefix = Attribute Flags=E2=80=9D sub-TLV which can be included in TLV = 135,235,236 and 237 (Extended IP reachability, MT IP. Reach, IPv6 IP. = Reach, and MT IPv6 IP. Reach TLVs) is more applicable? =20 =20 Best Regards. =20 Aijun Wang China Telecom =20 =E5=8F=91=E4=BB=B6=E4=BA=BA: [email protected] = [mailto:[email protected]] =E4=BB=A3=E8=A1=A8 [email protected] =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2020=E5=B9=B41=E6=9C=8810=E6=97=A5 = 12:00 =E6=94=B6=E4=BB=B6=E4=BA=BA: Aijun Wang =E6=8A=84=E9=80=81: Les Ginsberg; Robert Raszuk; [email protected] =E4=B8=BB=E9=A2=98: Re: [Lsr] Methods to label the passive interfaces = within ISIS =20 =20 Hi Aijun, =20 Thank you for your draft. =20 First off, a =E2=80=98passive interface=E2=80=99 is a particular user = interface phrase used by one very particular vendor. It=E2=80=99s not a = particularly accurate description, either. For example, a = =E2=80=98passive=E2=80=99 interface implies that it might accept protocol packets, but would not be active and send things on that = interface. That might have been meaningful in the distance vector days, = but we=E2=80=99re decades past that now. The =E2=80=99stub link=E2=80=99 = designation=20 sounds more accurate. =20 But that=E2=80=99s just naming. =20 As to mechanism, it seems to me that we already have the mechanisms that = you want. Specifically, RFC 5029 already gives us a way of capturing = link attributes. It would seem to me that all you need is a code point = from that registry and you=E2=80=99d be done. I=E2=80=99d recommend you = direct your draft in that direction. =20 Regards, Tony =20 =20 =20 On Jan 9, 2020, at 6:22 PM, Aijun Wang <[email protected]> = wrote: =20 Hi, Les, Robert and other experts within LSR: =20 We have submitted the draft that related to the passive interface = attribute, please review it at = <https://tools.ietf.org/html/draft-wang-lsr-passive-interface-attribute-0= 0> = https://tools.ietf.org/html/draft-wang-lsr-passive-interface-attribute-00= =20 If you are interested, we are also welcome you as the co-author to put = forward it together. Any comments are welcome. =20 Thanks in advance. =20 =20 Best Regards. =20 Aijun Wang China Telecom =20 =E5=8F=91=E4=BB=B6=E4=BA=BA: [email protected] = [mailto:[email protected]] =E4=BB=A3=E8=A1=A8 Aijun Wang =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2020=E5=B9=B41=E6=9C=887=E6=97=A5 = 18:57 =E6=94=B6=E4=BB=B6=E4=BA=BA: Robert Raszuk =E6=8A=84=E9=80=81: Les Ginsberg (ginsberg); [email protected] =E4=B8=BB=E9=A2=98: Re: [Lsr] Methods to label the passive interfaces = within ISIS =20 Hi, Robert: There are situations that we want to distinguish the passive interfaces = from the normal interfaces. I will try to write one draft in recent days = to describe it and for further discussion. =20 Thanks in advance. Aijun Wang China Telecom On Jan 7, 2020, at 18:14, Robert Raszuk < <mailto:[email protected]> = [email protected]> wrote: =EF=BB=BF Hi Aijun, =20 Right .. I took your email as an attempt/request to actually advertise = passive links in the first place.=20 =20 May we know what difference does it make to you if reachable prefix is = part of an active vs passive interface from IGP point of view ?=20 =20 Thx, R. =20 =20 On Tue, Jan 7, 2020 at 2:08 AM Aijun Wang < = <mailto:[email protected]> [email protected]> wrote: Hi, Robert: =20 Thanks for your information. TLV-22 is used to describe the IS neighbor and the link between them. As = for the passive interfaces, there may be no neighbor.=20 It seems the sub-TLV within this TLV is not the appropriate place to put = this information? =20 P.S. I changed the thread to reflect the conversion topic. =20 Best Regards. =20 Aijun Wang China Telecom =20 =E5=8F=91=E4=BB=B6=E4=BA=BA: <mailto:[email protected]> = [email protected] [mailto: <mailto:[email protected]> = [email protected]] =E4=BB=A3=E8=A1=A8 Robert Raszuk =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2020=E5=B9=B41=E6=9C=886=E6=97=A5 = 18:58 =E6=94=B6=E4=BB=B6=E4=BA=BA: Aijun Wang =E6=8A=84=E9=80=81: Les Ginsberg (ginsberg); <mailto:[email protected]> = [email protected] =E4=B8=BB=E9=A2=98: Re: [Lsr] =E7=AD=94=E5=A4=8D: Is it necessary to = expand the IS-IS level to 8? =20 Aijun, =20 We just want to distinguish the passive interfaces from other normal = interfaces within ISIS domain. It seems that the =E2=80=9CAttribute = Flags=E2=80=9D that described in = <https://tools.ietf.org/html/rfc7794#section-2.1> = https://tools.ietf.org/html/rfc7794#section-2.1 is the most appropriate = place to extend to carry such information. =20 Really ? =20 IMO much better place is to define new sub-TLV of TLV-22 and mark it = there as passive link. =20 Ref: <https://tools.ietf.org/html/rfc5029> = https://tools..ietf.org/html/rfc5029 =20 Now more interesting perhaps is to find out how ISIS is supposed to = react to such information. Or is the intention to carry it just as an = opaque info say for show commands use only ?=20 =20 Thx, R. =20 _______________________________________________ Lsr mailing list <mailto:[email protected]> [email protected] <https://www.ietf.org/mailman/listinfo/lsr> = https://www.ietf.org/mailman/listinfo/lsr _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr =20 ------=_NextPart_000_00BC_01D5C7C8.5660D1B0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" = xmlns:o=3D"urn:schemas-microsoft-com:office:office" = xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" = xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta = http-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta = name=3DGenerator content=3D"Microsoft Word 12 (filtered = medium)"><style><!-- /* Font Definitions */ @font-face {font-family:Helvetica; panose-1:2 11 6 4 2 2 2 2 2 4;} @font-face {font-family:=E5=AE=8B=E4=BD=93; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:"\@=E5=AE=8B=E4=BD=93"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:=E5=AE=8B=E4=BD=93;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} p.MsoAcetate, li.MsoAcetate, div.MsoAcetate {mso-style-priority:99; mso-style-link:"=E6=89=B9=E6=B3=A8=E6=A1=86=E6=96=87=E6=9C=AC Char"; margin:0cm; margin-bottom:.0001pt; font-size:9.0pt; font-family:=E5=AE=8B=E4=BD=93;} span.apple-converted-space {mso-style-name:apple-converted-space;} span.EmailStyle18 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} span.Char {mso-style-name:"=E6=89=B9=E6=B3=A8=E6=A1=86=E6=96=87=E6=9C=AC Char"; mso-style-priority:99; mso-style-link:=E6=89=B9=E6=B3=A8=E6=A1=86=E6=96=87=E6=9C=AC; font-family:=E5=AE=8B=E4=BD=93;} ..MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN link=3Dblue = vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Hi, Tony:<o:p></o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Thanks for your suggestions.<o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>If the behavior of =E2=80=9Cstub link=E2=80=9D is same as that = =E2=80=9Cpassive interface=E2=80=9D, for example, not sending thing on = that interface, but can receive, we can modify the description later in = the updated version of this draft.<o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>For the link attributes that defined in RFC5029, as that stated in = </span><span lang=3DEN-US><a = href=3D"https://tools.ietf.org/html/rfc5029#section-2">https://tools.ietf= ..org/html/rfc5029#section-2</a>, </span><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>this sub-TLV is included in the TLV 22(Extended IS Reachability). = <o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>As I read the IANA code point </span><span lang=3DEN-US><a = href=3D"https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod= epoints.xhtml#isis-tlv-codepoints-22-23-25-141-222-223">https://www.iana.= org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-co= depoints-22-23-25-141-222-223</a><span style=3D'color:#1F497D'>, = </span></span><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>it notes this sub-TLV can be included in all of these TLVs = (22,23,25,141,222,223). <o:p></o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>But, when the interface is configured as passive/stub, it seems that = the above TLVs will not be advertised, because there is no IS neighbor = on this passive link.=C2=A0 <o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>TLV 141 =E2=80=9CInter-AS reachability information=E2=80=9D seems be = one appropriate TLV to include this sub-TLV, but it requires the IS-IS = TE deployment, and is not suitable for describing the passive/stub link = on edge router.<o:p></o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>In summary, it seems put this attribute into the =E2=80=9CPrefix = Attribute Flags=E2=80=9D sub-TLV which can be included in TLV = 135,235,236 and 237 (Extended IP reachability, MT IP. Reach, IPv6 IP. = Reach, and MT IPv6 IP. Reach TLVs) is more = applicable?<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Best Regards.<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Aijun Wang<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>China Telecom</span><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><div><div = style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm = 0cm 0cm'><p class=3DMsoNormal><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></span></b><span lang=3DEN-US = style=3D'font-size:10.0pt'> [email protected] = [mailto:[email protected]] </span><b><span = style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8 </span></b><span = lang=3DEN-US = style=3D'font-size:10.0pt'>[email protected]<br></span><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span = lang=3DEN-US>:</span></span></b><span lang=3DEN-US = style=3D'font-size:10.0pt'> 2020</span><span = style=3D'font-size:10.0pt'>=E5=B9=B4<span = lang=3DEN-US>1</span>=E6=9C=88<span lang=3DEN-US>10</span>=E6=97=A5<span = lang=3DEN-US> 12:00<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></b><span lang=3DEN-US> Aijun = Wang<br></span><b>=E6=8A=84=E9=80=81<span lang=3DEN-US>:</span></b><span = lang=3DEN-US> Les Ginsberg; Robert Raszuk; = [email protected]<br></span><b>=E4=B8=BB=E9=A2=98<span = lang=3DEN-US>:</span></b><span lang=3DEN-US> Re: [Lsr] Methods to label = the passive interfaces within = ISIS<o:p></o:p></span></span></p></div></div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p><div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><p = class=3DMsoNormal><span lang=3DEN-US>Hi = Aijun,<o:p></o:p></span></p><div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>Thank you for your = draft.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>First off, a =E2=80=98passive = interface=E2=80=99 is a particular user interface phrase used by one = very particular vendor. It=E2=80=99s not a particularly accurate = description, either. For example, a =E2=80=98passive=E2=80=99 interface = implies that it might<o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>accept protocol packets, but would = not be active and send things on that interface. That might have = been meaningful in the distance vector days, but we=E2=80=99re decades = past that now. The =E2=80=99stub link=E2=80=99 = designation <o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>sounds more = accurate.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>But that=E2=80=99s just = naming.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>As to mechanism, it seems to me = that we already have the mechanisms that you want. Specifically, RFC = 5029 already gives us a way of capturing link attributes. It would seem = to me that all you need is a code point from that registry and = you=E2=80=99d be done. I=E2=80=99d recommend you direct your draft = in that direction.<o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US>Regards,<o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US>Tony<o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US><br><br><o:p></o:p></span></p><div><p = class=3DMsoNormal><span lang=3DEN-US>On Jan 9, 2020, at 6:22 PM, Aijun = Wang <<a = href=3D"mailto:[email protected]">[email protected]</a>&g= t; wrote:<o:p></o:p></span></p></div><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p><div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Hi, Les, Robert and other experts within LSR:</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>We have submitted the draft that related to the passive interface = attribute, please review it at </span><span lang=3DEN-US><a = href=3D"https://tools.ietf.org/html/draft-wang-lsr-passive-interface-attr= ibute-00"><span = style=3D'color:purple'>https://tools.ietf.org/html/draft-wang-lsr-passive= -interface-attribute-00</span></a><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>If you are interested, we are also welcome you as the co-author to = put forward it together.</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Any comments are welcome.</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Thanks in advance.</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Best Regards.</span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Aijun Wang</span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>China Telecom</span><span lang=3DEN-US><o:p></o:p></span></p><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><div = style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm = 0cm 0cm'><div><p class=3DMsoNormal><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></span></b><span = class=3Dapple-converted-space><span lang=3DEN-US = style=3D'font-size:10.0pt'> </span></span><span lang=3DEN-US = style=3D'font-size:10.0pt'><a = href=3D"mailto:[email protected]">[email protected]</a> [<a = href=3D"mailto:[email protected]">mailto:[email protected]</a>]<spa= n class=3Dapple-converted-space> </span></span><b><span = style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8<span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span></span></b><span lang=3DEN-US = style=3D'font-size:10.0pt'>Aijun Wang<br></span><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span = lang=3DEN-US>:</span></span></b><span = class=3Dapple-converted-space><span lang=3DEN-US = style=3D'font-size:10.0pt'> </span></span><span lang=3DEN-US = style=3D'font-size:10.0pt'>2020</span><span = style=3D'font-size:10.0pt'>=E5=B9=B4<span = lang=3DEN-US>1</span>=E6=9C=88<span lang=3DEN-US>7</span>=E6=97=A5<span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span = lang=3DEN-US>18:57<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Robert = Raszuk<br></span><b>=E6=8A=84=E9=80=81<span = lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Les Ginsberg = (ginsberg); <a = href=3D"mailto:[email protected]">[email protected]</a><br></span><b>=E4=B8=BB=E9=A2= =98<span lang=3DEN-US>:</span></b><span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Re: [Lsr] Methods to = label the passive interfaces within ISIS</span></span><span = lang=3DEN-US><o:p></o:p></span></p></div></div></div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US>Hi, = Robert:<o:p></o:p></span></p></div><div><div><p class=3DMsoNormal><span = lang=3DEN-US>There are situations that we want to distinguish the = passive interfaces from the normal interfaces. I will try to write one = draft in recent days to describe it and for further = discussion.<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p = class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span = lang=3DEN-US>Thanks in advance.<o:p></o:p></span></p><div><div><p = class=3DMsoNormal><span lang=3DEN-US>Aijun = Wang<o:p></o:p></span></p></div><div><div><p class=3DMsoNormal><span = lang=3DEN-US>China = Telecom<o:p></o:p></span></p></div></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US><br><br><br><o:p></o:p></span></p></div><p = class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DEN-US>On = Jan 7, 2020, at 18:14, Robert Raszuk <<a = href=3D"mailto:[email protected]"><span = style=3D'color:purple'>[email protected]</span></a>> = wrote:<o:p></o:p></span></p></div><blockquote = style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p = class=3DMsoNormal><span lang=3DEN-US>=EF=BB=BF</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>Hi = Aijun,<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><p = class=3DMsoNormal><span lang=3DEN-US>Right .. I took your email as = an attempt/request to actually advertise passive links in the first = place. <o:p></o:p></span></p></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>May we know what difference does it = make to you if reachable prefix is part of an active vs passive = interface from IGP point of view = ? <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US>Thx,<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US>R.<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div></div></div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div><div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>On Tue, Jan 7, 2020 at 2:08 AM = Aijun Wang <<a href=3D"mailto:[email protected]"><span = style=3D'color:purple'>[email protected]</span></a>> = wrote:<o:p></o:p></span></p></div></div><blockquote = style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm = 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5= ..0pt'><div><div><div><p class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Hi, Robert:</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for = your information.</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>TLV-22 is used to describe the IS neighbor and the link between them. = As for the passive interfaces, there may be no neighbor.<span = class=3Dapple-converted-space> </span></span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>It seems the sub-TLV within this TLV is not the appropriate place to = put this information?</span><span = lang=3DEN-US><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>P.S. I changed the thread to reflect the conversion = topic.</span><span lang=3DEN-US><o:p></o:p></span></p></div><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Best Regards.</span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Aijun Wang</span><span lang=3DEN-US><o:p></o:p></span></p><p = class=3DMsoNormal = style=3D'text-align:justify;text-justify:inter-ideograph'><span = lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'>China Telecom</span><span lang=3DEN-US><o:p></o:p></span></p><div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497= D'> </span><span lang=3DEN-US><o:p></o:p></span></p></div><div = style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm = 0cm 0cm'><div><p class=3DMsoNormal><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></span></b><span = class=3Dapple-converted-space><span lang=3DEN-US = style=3D'font-size:10.0pt'> </span></span><span lang=3DEN-US = style=3D'font-size:10.0pt'><a href=3D"mailto:[email protected]" = target=3D"_blank"><span = style=3D'color:purple'>[email protected]</span></a><span = class=3Dapple-converted-space> </span>[mailto:<a = href=3D"mailto:[email protected]" target=3D"_blank"><span = style=3D'color:purple'>[email protected]</span></a>]<span = class=3Dapple-converted-space> </span></span><b><span = style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8<span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span></span></b><span lang=3DEN-US = style=3D'font-size:10.0pt'>Robert Raszuk<br></span><b><span = style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span = lang=3DEN-US>:</span></span></b><span = class=3Dapple-converted-space><span lang=3DEN-US = style=3D'font-size:10.0pt'> </span></span><span lang=3DEN-US = style=3D'font-size:10.0pt'>2020</span><span = style=3D'font-size:10.0pt'>=E5=B9=B4<span = lang=3DEN-US>1</span>=E6=9C=88<span lang=3DEN-US>6</span>=E6=97=A5<span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span = lang=3DEN-US>18:58<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span = lang=3DEN-US>:</span></b><span class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Aijun = Wang<br></span><b>=E6=8A=84=E9=80=81<span lang=3DEN-US>:</span></b><span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Les Ginsberg = (ginsberg);<span class=3Dapple-converted-space> </span><a = href=3D"mailto:[email protected]" target=3D"_blank"><span = style=3D'color:purple'>[email protected]</span></a><br></span><b>=E4=B8=BB=E9=A2= =98<span lang=3DEN-US>:</span></b><span = class=3Dapple-converted-space><span = lang=3DEN-US> </span></span><span lang=3DEN-US>Re: [Lsr]<span = class=3Dapple-converted-space> </span></span>=E7=AD=94=E5=A4=8D<span= lang=3DEN-US>: Is it necessary to expand the IS-IS level to = 8?</span></span><span = lang=3DEN-US><o:p></o:p></span></p></div></div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div><div><div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US>Aijun,<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><blockquote = style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm = 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5= ..0pt'><div><div><p class=3DMsoNormal><span lang=3DEN-US = style=3D'color:#1F497D'>We just want to distinguish the passive = interfaces from other normal interfaces within ISIS domain. It = seems that the </span><span style=3D'color:#1F497D'>=E2=80=9C<span = lang=3DEN-US>Attribute Flags</span>=E2=80=9D<span lang=3DEN-US> that = described in<span = class=3Dapple-converted-space> </span></span></span><span = lang=3DEN-US><a href=3D"https://tools.ietf.org/html/rfc7794#section-2.1" = target=3D"_blank"><span = style=3D'color:purple'>https://tools.ietf.org/html/rfc7794#section-2.1</s= pan></a><span class=3Dapple-converted-space><span = style=3D'color:#1F497D'> </span></span><span = style=3D'color:#1F497D'>is the most appropriate place to extend to carry = such = information.</span><o:p></o:p></span></p></div></div></blockquote><div><d= iv><p class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>Really = ?<o:p></o:p></span></p></div></div><div><div><p class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>IMO much better place is to define = new sub-TLV of TLV-22 and mark it there as passive = link.<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>Ref: <a = href=3D"https://tools.ietf.org/html/rfc5029" target=3D"_blank"><span = style=3D'color:purple'>https://tools..ietf.org/html/rfc5029</span></a><o:= p></o:p></span></p></div></div><div><div><p class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span lang=3DEN-US>Now more interesting perhaps is to = find out how ISIS is supposed to react to such information. Or is the = intention to carry it just as an opaque info say for show commands use = only ? <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US>Thx,<br>R.<o:p></o:p></span></p></div></div><div><div><p = class=3DMsoNormal><span = lang=3DEN-US> <o:p></o:p></span></p></div></div></div></div></div></= div></blockquote></div><div><p class=3DMsoNormal><span = lang=3DEN-US>_______________________________________________<br>Lsr = mailing list<br><a href=3D"mailto:[email protected]"><span = style=3D'color:purple'>[email protected]</span></a><br><a = href=3D"https://www.ietf.org/mailman/listinfo/lsr"><span = style=3D'color:purple'>https://www.ietf.org/mailman/listinfo/lsr</span></= a><o:p></o:p></span></p></div></div></blockquote></div><p = class=3DMsoNormal><span lang=3DEN-US = style=3D'font-size:10.5pt;font-family:"Helvetica","sans-serif"'>_________= ______________________________________<br>Lsr mailing list<br><a = href=3D"mailto:[email protected]">[email protected]</a><br><a = href=3D"https://www.ietf.org/mailman/listinfo/lsr">https://www.ietf.org/m= ailman/listinfo/lsr</a></span><span = lang=3DEN-US><o:p></o:p></span></p></div></div><p = class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div></div></body></html> ------=_NextPart_000_00BC_01D5C7C8.5660D1B0-- --===============4349624153049146295== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr --===============4349624153049146295==--