Re: Methods to label the passive interfaces within ISIS
Jeff Tantsura <[email protected]> Mon, 13 Jan 2020 10:32:14 -0800
| Newsgroups | gmane.ietf.isis |
|---|---|
| Message-ID | <52685ed7-f7e8-4828-82b1-234f78a8fc39__25362.9147818842$1578940577$gmane$org@Spark> |
--===============5867919710322516015== Content-Type: multipart/alternative; boundary="5e1cb7b3_28677b7c_496" --5e1cb7b3_28677b7c_496 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Agree with Acee and Les Cheers, Jeff On Jan 13, 2020, 9:29 AM -0800, Les Ginsberg (ginsberg) <ginsberg=40cisco= ..com>, wrote: > I agree with Acee that there is no requirement to identify an interface= as passive =E2=80=93 or (as suggested in this thread) as loopback or tun= nel or stub=E2=80=A6 > > Before debating the best encoding for information, it would be sensible= to define the use case/requirements. > Simply having an advertisement that identifies an interface type isn=E2= =80=99t sufficient to do anything useful IMO. > > =C2=A0=C2=A0 Les > > =46rom: Acee Lindem (acee) <acee=40cisco.com> > Sent: Monday, January 13, 2020 8:03 AM > To: tony.li=40tony.li; Aijun Wang <wangaijun=40tsinghua.org.cn> > Cc: Les Ginsberg (ginsberg) <ginsberg=40cisco.com>; Robert Raszuk <robe= rt=40raszuk.net>; lsr=40ietf.org > Subject: Re: =5BLsr=5D Methods to label the passive interfaces within I= SIS > > Hi Aijun, > I guess the external use case for this is advertisement in BGP-LS for N= etwork Management purposes=3F=3F There really isn=E2=80=99t IS-IS require= ment to know whether or not an interface is a passive interface. > Thanks, > Acee > > =46rom: Lsr <lsr-bounces=40ietf.org> on behalf of Tony Li <tony.li=40to= ny.li> > Date: Monday, January 13, 2020 at 11:00 AM > To: Aijun Wang <wangaijun=40tsinghua.org.cn> > Cc: =22Les Ginsberg (ginsberg)=22 <ginsberg=40cisco.com>, Robert Raszuk= <robert=40raszuk.net>, =22lsr=40ietf.org=22 <lsr=40ietf.org> > Subject: Re: =5BLsr=5D Methods to label the passive interfaces within I= SIS > > > Hi Anjun, > > > > Is it reasonable to put the link attribute information into the =E2=80= =9CIP Reachability TLV=E2=80=9D=3F > > IMHO, such stub link is not the normal links within IGP domain.=C2=A0= Label the related prefix is coming from the passive/stub link seems also= acceptable=3F > > > Well, a passive interface is really configured so that you advertise th= e interface=E2=80=99s prefix. =C2=A0Attaching the data that you want to t= he associated data seems reasonable to me. > > There=E2=80=99s no good IS Neighbor advertisement to attach the sub-TLV= to because there is no neighbor. > > Tony > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > Lsr mailing list > Lsr=40ietf.org > https://www.ietf.org/mailman/listinfo/lsr --5e1cb7b3_28677b7c_496 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline <html xmlns=3D=22http://www.w3.org/1999/xhtml=22> <head> <title></title> </head> <body> <div name=3D=22messageBodySection=22> <div dir=3D=22auto=22>Agree with Acee and Les</div> </div> <div name=3D=22messageSignatureSection=22><br /> <div class=3D=22match=46ont=22>Cheers, <div>Jeff</div> </div> </div> <div name=3D=22messageReplySection=22>On Jan 13, 2020, 9:29 AM -0800, Les= Ginsberg (ginsberg) <ginsberg=40cisco.com>, wrote:<br /> <blockquote type=3D=22cite=22 class=3D=22spark=5Fquote=22 style=3D=22marg= in: 5px 5px; padding-left: 10px; border-left: thin solid =231abc9c;=22> <div class=3D=22WordSection1=22> <p class=3D=22MsoNormal=22>I agree with Acee that there is no requirement= to identify an interface as passive =E2=80=93 or (as suggested in this t= hread) as loopback or tunnel or stub=E2=80=A6</p> <p class=3D=22MsoNormal=22>&=23160;</p> <p class=3D=22MsoNormal=22>Before debating the best encoding for informat= ion, it would be sensible to define the use case/requirements.</p> <p class=3D=22MsoNormal=22>Simply having an advertisement that identifies= an interface type isn=E2=80=99t sufficient to do anything useful IMO.</p= > <p class=3D=22MsoNormal=22>&=23160;</p> <p class=3D=22MsoNormal=22>&=23160;&=23160; Les</p> <p class=3D=22MsoNormal=22></p> <p class=3D=22MsoNormal=22>&=23160;</p> <div style=3D=22border:none;border-left:solid blue 1.5pt;padding:0in 0in = 0in 4.0pt=22> <div> <div style=3D=22border:none;border-top:solid =23E1E1E1 1.0pt;padding:3.0p= t 0in 0in 0in=22> <p class=3D=22MsoNormal=22><b>=46rom:</b> Acee Lindem (acee) <acee=40c= isco.com><br /> <b>Sent:</b> Monday, January 13, 2020 8:03 AM<br /> <b>To:</b> tony.li=40tony.li; Aijun Wang <wangaijun=40tsinghua.org.cn&= gt;<br /> <b>Cc:</b> Les Ginsberg (ginsberg) <ginsberg=40cisco.com>; Robert R= aszuk <robert=40raszuk.net>; lsr=40ietf.org<br /> <b>Subject:</b> Re: =5BLsr=5D Methods to label the passive interfaces wit= hin ISIS</p> </div> </div> <p class=3D=22MsoNormal=22>&=23160;</p> <p class=3D=22MsoNormal=22>Hi Aijun,</p> <p class=3D=22MsoNormal=22>I guess the external use case for this is adve= rtisement in BGP-LS for Network Management purposes=3F=3F There really is= n=E2=80=99t IS-IS requirement to know whether or not an interface is a pa= ssive interface.</p> <p class=3D=22MsoNormal=22>Thanks,</p> <p class=3D=22MsoNormal=22>Acee</p> <p class=3D=22MsoNormal=22>&=23160;</p> <div style=3D=22border:none;border-top:solid =23B5C4D=46 1.0pt;padding:3.= 0pt 0in 0in 0in=22> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22><b><span style=3D= =22font-size:12.0pt;color:black=22>=46rom:</span></b> <span style=3D=22fo= nt-size:12.0pt;color:black=22>Lsr <<a href=3D=22mailto:lsr-bounces=40i= etf.org=22>lsr-bounces=40ietf.org</a>> on behalf of Tony Li <<a hre= f=3D=22mailto:tony.li=40tony.li=22>tony.li=40tony.li</a>><br /> <b>Date:</b> Monday, January 13, 2020 at 11:00 AM<br /> <b>To:</b> Aijun Wang <<a href=3D=22mailto:wangaijun=40tsinghua.org.cn= =22>wangaijun=40tsinghua.org.cn</a>><br /> <b>Cc:</b> =22Les Ginsberg (ginsberg)=22 <<a href=3D=22mailto:ginsberg= =40cisco.com=22>ginsberg=40cisco.com</a>>, Robert Raszuk <<a href=3D= =22mailto:robert=40raszuk.net=22>robert=40raszuk.net</a>>, =22<a href=3D= =22mailto:lsr=40ietf.org=22>lsr=40ietf.org</a>=22 <<a href=3D=22mailto= :lsr=40ietf.org=22>lsr=40ietf.org</a>><br /> <b>Subject:</b> Re: =5BLsr=5D Methods to label the passive interfaces wit= hin ISIS</span></p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>Hi Anjun,</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22mso-margin-top-alt:0in;margin-right= :0in;margin-bottom:12.0pt;margin-left:.5in=22>&=23160;</p> <blockquote style=3D=22margin: 5px 5px; padding-left: 10px; border-left: = thin solid =23e67e22;=22 class=3D=22spark=5Fquote=22> <div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22><span style=3D=22= font-size:10.5pt;color:=231=46497D=22>Is it reasonable to put the link at= tribute information into the =E2=80=9CIP Reachability TLV=E2=80=9D=3F</sp= an><span style=3D=22font-size:12.0pt;font-family:SimSun=22></span></p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22><span style=3D=22= font-size:10.5pt;color:=231=46497D=22>IMHO, such stub link is not the nor= mal links within IGP domain.&=23160; Label the related prefix is coming f= rom the passive/stub link seems also acceptable=3F</span><span style=3D=22= font-size:12.0pt;font-family:SimSun=22></span></p> </div> </div> </blockquote> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>Well, a passive= interface is really configured so that you advertise the interface=E2=80= =99s prefix. &=23160;Attaching the data that you want to the associated d= ata seems reasonable to me.</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>There=E2=80=99s= no good IS Neighbor advertisement to attach the sub-TLV to because there= is no neighbor.</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>Tony</p> </div> <div> <p class=3D=22MsoNormal=22 style=3D=22margin-left:.5in=22>&=23160;</p> </div> <p class=3D=22MsoNormal=22 style=3D=22mso-margin-top-alt:0in;margin-right= :0in;margin-bottom:12.0pt;margin-left:.5in=22>&=23160;</p> </div> </div> =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F<br /> Lsr mailing list<br /> Lsr=40ietf.org<br /> https://www.ietf.org/mailman/listinfo/lsr<br /></blockquote> </div> </body> </html> --5e1cb7b3_28677b7c_496-- --===============5867919710322516015== Content-Type: text/plain; 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