Re: vrrp Digest, Vol 81, Issue 3
Thirumavalavan Periyannan <[email protected]> Mon, 25 Feb 2013 20:37:37 +0530
| Newsgroups | gmane.ietf.vrrp |
|---|---|
| Message-ID | <617438426768D648ABBC00E677AA014902697FB19C66@INEXCHANGE.corp.extremenetworks.com> |
--===============2816706782152971379== Content-Language: en-US Content-Type: multipart/related; boundary="_004_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_"; type="multipart/alternative" --_004_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_ Content-Type: multipart/alternative; boundary="_000_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_" --_000_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Anurag, Sorry for the late response. See the inline [Thiru] Here, I have a question, 1.Do We have to configure priority Zero on Master router to do graceful fai= lover? Thanks & Regards, Thirumavalavan Periyannan Associate SQA Engineer - VRRP Module Owner [cid:[email protected]] -----Original Message----- From: Anurag Kothari (ankothar) [mailto:[email protected]] Sent: Saturday, February 23, 2013 12:57 AM To: Thirumavalavan Periyannan; [email protected] Cc: Peter Hunt Subject: RE: [VRRP] vrrp Digest, Vol 81, Issue 3 Hi Thirumavalavan Here are couple of points: 1) With something like "disable vrrp" or "shutdown vrrp" it will not be gra= ceful as the router will treat it as a shutdown event (which is a break bef= ore you make approach) and the router will "Transition to the {Initialize} = state". The backup router will wait for "Skew_Time"[Thiru]I think, it's Mas= ter_Down_interval time. before it becomes master; So we probably will have = traffic loss for a period approximately equal to "Skew_Time"[Thiru]I think,= it's Master_Down_interval time. Even with Default configuration this will = be close to 609 ms which would be a duration long enough for to impact time= sensitive applications (e.g. voice calls). For sure the actual failover ti= me will depend upon the size of the Network and the switches in between but= with the method proposed below we can try to improve that time. 2) This will also improve convergence in scenarios where we want the failov= er to trigger because of up uplink interface from the router going down (tr= acking interface and decrementing the priority). I am not sure if you saw the modified proposal which was sent out today ear= ly morning. Here is the link to it in case you need it http://www.ietf.org/= mail-archive/web/vrrp/current/msg01489.html Thanks ~Anurag ________________________________ DISCLAIMER: This e-mail and any attachments to it may contain confidential and propriet= ary material and is solely for the use of the intended recipient. Any revie= w, use, disclosure, distribution or copying of this transmittal is prohibit= ed except by or on behalf of the intended recipient. If you have received t= his transmittal in error, please notify the sender and destroy this e-mail = and any attachments and all copies, whether electronic or printed. --_000_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-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=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <!--[if !mso]><style>v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} </style><![endif]--><style><!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif";} 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.MsoPlainText, li.MsoPlainText, div.MsoPlainText {mso-style-priority:99; mso-style-link:"Plain Text Char"; margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Courier New"; color:#0606BA;} p.MsoAcetate, li.MsoAcetate, div.MsoAcetate {mso-style-priority:99; mso-style-link:"Balloon Text Char"; margin:0in; margin-bottom:.0001pt; font-size:8.0pt; font-family:"Tahoma","sans-serif";} span.PlainTextChar {mso-style-name:"Plain Text Char"; mso-style-priority:99; mso-style-link:"Plain Text"; font-family:"Courier New"; color:#0606BA;} span.BalloonTextChar {mso-style-name:"Balloon Text Char"; mso-style-priority:99; mso-style-link:"Balloon Text"; font-family:"Tahoma","sans-serif";} span.EmailStyle21 {mso-style-type:personal-reply; font-family:"Courier New"; color:black;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} 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=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E">Hi Anurag,<o:p></o:= p></span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E"><o:p> </o:p></= span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E">Sorry for the late = response.<o:p></o:p></span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E"><o:p> </o:p></= span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E">See the inline [Thi= ru]<o:p></o:p></span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E"><o:p> </o:p></= span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E">Here, I have </span= ><span style=3D"color:black">a </span><span style=3D"color:#17375E">question,<o:p></o:p></span></p> <p class=3D"MsoPlainText"><span style=3D"color:#17375E"><o:p> </o:p></= span></p> <p class=3D"MsoPlainText"><span style=3D"color:black">1</span><span style= =3D"color:#17375E">.Do We have to configure priority Zero on Master router = to do graceful failover?</span><span style=3D"color:black"><o:p></o:p></spa= n></p> <p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;color:#1F497D"><o:p>= </o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;color:#1F497D">Thank= s & Regards,<o:p></o:p></span></p> <p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;color:#1F497D">Th= irumavalavan Periyannan</span></b><span style=3D"font-size:10.0pt;color:#1F= 497D"><o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;color:#1F497D">Assoc= iate SQA Engineer - VRRP Module Owner<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;color:#1F497D"><o:p>= </o:p></span></p> <p class=3D"MsoNormal"><b><span style=3D"color:#4A442A"><img width=3D"188" = height=3D"65" id=3D"Picture_x0020_2" src=3D"cid:[email protected]= 080" alt=3D"Description: Description: Description: Description: Description= : Description: Description: Description: cid:[email protected]= "></span></b><span style=3D"color:#1F497D"><o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p> </o:p></spa= n></p> <p class=3D"MsoPlainText">-----Original Message-----<br> From: Anurag Kothari (ankothar) [mailto:[email protected]] <br> Sent: Saturday, February 23, 2013 12:57 AM<br> To: Thirumavalavan Periyannan; [email protected]<br> Cc: Peter Hunt<br> Subject: RE: [VRRP] vrrp Digest, Vol 81, Issue 3<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Hi Thirumavalavan<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Here are couple of points:<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">1) With something like "disable vrrp" o= r "shutdown vrrp" it will not be graceful as the router will trea= t it as a shutdown event (which is a break before you make approach) and th= e router will "Transition to the {Initialize} state". The backup router will wait for "Skew_Time"<b><span style=3D"col= or:red">[Thiru]I think, it’s Master_Down_interval time.</span></b> be= fore it becomes master; So we probably will have traffic loss for a period = approximately equal to "Skew_Time"<b><span style=3D"color:red">[T= hiru]I think, it’s Master_Down_interval time</span></b>. Even with Default = configuration this will be close to 609 ms which would be a duration long e= nough for to impact time sensitive applications (e.g. voice calls). For sur= e the actual failover time will depend upon the size of the Network and the switches in between but with the meth= od proposed below we can try to improve that time.<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">2) This will also improve convergence in scenario= s where we want the failover to trigger because of up uplink interface from= the router going down (tracking interface and decrementing the priority).<= o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">I am not sure if you saw the modified proposal wh= ich was sent out today early morning. Here is the link to it in case you ne= ed it <a href=3D"http://www.ietf.org/mail-archive/web/vrrp/current/msg01489.html"= ><span style=3D"color:#0606BA;text-decoration:none">http://www.ietf.org/mai= l-archive/web/vrrp/current/msg01489.html</span></a><o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Thanks<o:p></o:p></p> <p class=3D"MsoPlainText">~Anurag<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> </div> <br> <hr> <font face=3D"Arial" color=3D"Gray" size=3D"2">DISCLAIMER:<br> This e-mail and any attachments to it may contain confidential and propriet= ary material and is solely for the use of the intended recipient. Any revie= w, use, disclosure, distribution or copying of this transmittal is prohibit= ed except by or on behalf of the intended recipient. If you have received this transmittal in error, please= notify the sender and destroy this e-mail and any attachments and all copi= es, whether electronic or printed.<br> </font> </body> </html> --_000_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_-- --_004_617438426768D648ABBC00E677AA014902697FB19C66INEXCHANGEc_ Content-Type: image/jpeg; name="image001.jpg" Content-Description: image001.jpg Content-Disposition: inline; filename="image001.jpg"; size=3541; creation-date="Mon, 25 Feb 2013 15:07:38 GMT"; modification-date="Mon, 25 Feb 2013 15:07:38 GMT" Content-ID: <[email protected]> Content-Transfer-Encoding: base64 /9j/4AAQSkZJRgABAQEAeAB4AAD/2wBDAAoHBwkHBgoJCAkLCwoMDxkQDw4ODx4WFxIZJCAmJSMg IyIoLTkwKCo2KyIjMkQyNjs9QEBAJjBGS0U+Sjk/QD3/2wBDAQsLCw8NDx0QEB09KSMpPT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT3/wAARCABBALwDASIA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA 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