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List: ietf-vrrp
Subject: Re: [VRRP] =?gb2312?b?tPC4tDogUmU6ICB2cnJwIGZhc3RlciBiYWNrdXA=?=
From: "Stephen Nadas" <stephen.nadas () ericsson ! com>
Date: 2009-07-07 16:02:58
Message-ID: DF78BDF6956FDD4780D5DAD88A073CF4025C71B7 () eusrcmw720 ! eamcs ! ericsson ! se
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Hi,
If I understand the original question properly, the question is how, under expected \
failure scenarios, can backup take over of the master in less than 3 seconds. This \
has been discussed at some length on the mailing list (which you may wish to review) \
and please see also latest draft: draft-ietf-vrrp-unified-spec-03 which should \
appear in the repository soon. The draft discusses this issue.
Regards,
Steve
________________________________
From: vrrp-bounces@ietf.org [mailto:vrrp-bounces@ietf.org] On Behalf Of \
liu.zhiwei1@zte.com.cn Sent: Tuesday, July 07, 2009 11:16 AM
To: Arnab Bakshi
Cc: vrrp@ietf.org
Subject: [VRRP] 答复: Re: vrrp faster backup
Dear Arnab
Thanks for your feedback.
Then when the priority value isn't zero, the Backup Router should waiting the Master \
Router time out. Are they any other way when priority isn't zero?
Best Regards
Dash Liu 刘志伟 ID: 183475
Chief Engineer Office, Standard Development and Industry Relations
Product Marketing System
产品市场体系
D206, 889, Bibo Road,ZhangJiang, Pudong District, ShangHai P.R.China, 210023
Tel:+86-21-68896823/ 13701767991
Mobile:+86-13828760990
Email:liu.zhiwei1@zte.com.cn
Arnab Bakshi <arnab.bakshi@gmail.com>
2009-07-06 20:52
收件人
liu.zhiwei1@zte.com.cn, vrrp@ietf.org
抄送
主题
Re: [VRRP] vrrp faster backup
Hi Liu,
As per RFC 3768, section 5.3.4 page 12:
The priority value zero (0) has special meaning indicating that the
current Master has stopped participating in VRRP. This is used to
trigger Backup routers to quickly transition to Master without having
to wait for the current Master to timeout.
This is one way I think if the master router gracefully indicates the other routers \
in the network.
Regards
Arnab
2009/7/6 <liu.zhiwei1@zte.com.cn <mailto:liu.zhiwei1@zte.com.cn> >
Dear All
I'm a new comer in IETF.
VRRP [RFC 3768] specifies an election protocol that dynamically assigns \
responsibility for a virtual router to one of the VRRP routers on a LAN. This \
election process provides dynamic fail over in the forwarding responsibility should \
the Master become unavailable.
The router survivability capability provided by the Virtual Router Redundancy \
Protocol requirement: (3 * Master_Adver_Interval) + Skew_timer for Backup Router to \
declare Masterdown in the VRRP [RFC 3768]. It will be more than 3 second when the \
Master_Adver_Interval was 1 second. In some LAN environments, the Backup Router \
needs faster method to declare the Master Router is fail. As if (2 * \
Master_Adver_Interval) + Skew_timer or (1 * Master_Adver_Interval) + Skew_timer. \
Are there a message type which permits the Backup Router could backup faster?
Best Regards
Dash Liu 刘志伟 ID: 183475
Chief Engineer Office, Standard Development and Industry Relations
Product Marketing System
产品市场体系
D206, 889, Bibo Road,ZhangJiang, Pudong District, ShangHai P.R.China, 210023
Tel:+86-21-68896823/ 13701767991
Mobile:+86-13828760990
Email:liu.zhiwei1@zte.com.cn <mailto:Email%3Aliu.zhiwei1@zte.com.cn>
_______________________________________________
vrrp mailing list
vrrp@ietf.org <mailto:vrrp@ietf.org>
https://www.ietf.org/mailman/listinfo/vrrp \
<https://www.ietf.org/mailman/listinfo/vrrp>
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<BODY>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009>Hi, </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009>If I understand the original question properly, the
question is how, under expected failure scenarios, can backup take over of
the master in less than 3 seconds. This has been discussed at some
length on the mailing list (which you may wish to review) and please see
also latest draft: draft-ietf-vrrp-unified-spec-03 which should
appear in the repository soon. The draft discusses this issue.
</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009>Regards,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=423175715-07072009>Steve </SPAN></FONT></DIV><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> vrrp-bounces@ietf.org
[mailto:vrrp-bounces@ietf.org] <B>On Behalf Of
</B>liu.zhiwei1@zte.com.cn<BR><B>Sent:</B> Tuesday, July 07, 2009 11:16
AM<BR><B>To:</B> Arnab Bakshi<BR><B>Cc:</B> vrrp@ietf.org<BR><B>Subject:</B>
[VRRP] 答复: Re: vrrp faster backup<BR></FONT><BR></DIV>
<DIV></DIV><BR><FONT face=Arial size=1>Dear Arnab </FONT><BR><BR><FONT
face=Arial size=1>Thanks for your feedback.</FONT> <BR><FONT face=Arial
size=1>Then when the priority value isn't zero, the Backup Router should
waiting the Master Router time out. </FONT><BR><FONT face=Arial size=1>Are
they any other way when priority isn't zero? </FONT><BR><FONT face=Arial
size=1> </FONT> <BR><FONT face=Arial size=1>Best Regards </FONT><BR>
<TABLE>
<TBODY>
<TR>
<TD>
<DIV align=center><IMG src="cid:423175715@07072009-1B2D"></DIV>
<TD><FONT size=2><BR></FONT>
<TABLE width="100%">
<TBODY>
<TR>
<TD colSpan=2><FONT size=3><B>Dash Liu 刘志伟 ID: 183475
</B></FONT><BR><FONT size=1>Chief Engineer Office, Standard
Development and Industry Relations </FONT>
<TR>
<TD rowSpan=2><IMG src="cid:423175715@07072009-1B34">
<TD><FONT color=#909090 size=1><B>Product Marketing System
</B></FONT>
<TR>
<TD><FONT color=#909090 size=1><B>产品市场体系</B></FONT>
<TR>
<TD colSpan=2><FONT size=1>D206, 889, Bibo Road,ZhangJiang, Pudong
District, ShangHai P.R.China, 210023<BR>Tel:+86-21-68896823/
13701767991<BR>Mobile:+86-13828760990<BR>Email:liu.zhiwei1@zte.com.cn
</FONT></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><BR><BR><BR>
<TABLE width="100%">
<TBODY>
<TR vAlign=top>
<TD width="26%"><FONT face=sans-serif size=1><B>Arnab Bakshi
<arnab.bakshi@gmail.com></B> </FONT>
<P><FONT face=sans-serif size=1>2009-07-06 20:52</FONT> </P>
<TD width="73%">
<TABLE width="100%">
<TBODY>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>收件人</FONT></DIV>
<TD><FONT face=sans-serif size=1>liu.zhiwei1@zte.com.cn,
vrrp@ietf.org</FONT>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>抄送</FONT></DIV>
<TD>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>主题</FONT></DIV>
<TD><FONT face=sans-serif size=1>Re: [VRRP] vrrp faster
backup</FONT></TR></TBODY></TABLE><BR>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD>
<TD></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><BR><BR><FONT
face="Times New Roman" size=3>Hi Liu,</FONT> <BR><FONT face="Times New Roman"
size=3><BR> As per RFC 3768, section 5.3.4 page 12:</FONT> <BR><FONT
face="Times New Roman" size=3> The priority value zero (0)
has special meaning indicating that the<BR> current Master has
stopped participating in VRRP. This is used to<BR> trigger
Backup routers to quickly transition to Master without having<BR>
to wait for the current Master to timeout.<BR></FONT><BR><FONT face=sans-serif
size=3>This is one way I think if the master router gracefully indicates the
other routers in the network.</FONT> <BR><BR><FONT face=sans-serif
size=3>Regards</FONT> <BR><FONT face=sans-serif size=3>Arnab</FONT>
<BR><BR><FONT face=sans-serif size=3>2009/7/6 <</FONT><A
href="mailto:liu.zhiwei1@zte.com.cn"><FONT face=sans-serif color=blue
size=3><U>liu.zhiwei1@zte.com.cn</U></FONT></A><FONT face=sans-serif
size=3>></FONT> <BR><FONT face=sans-serif size=2><BR></FONT><FONT
face=sans-serif size=1><BR>Dear All</FONT><FONT face=sans-serif size=3>
<BR></FONT><FONT face=sans-serif size=1><BR>I'm a new comer in
IETF.</FONT><FONT face=sans-serif size=3> <BR></FONT><FONT face=sans-serif
size=1><BR>VRRP [RFC 3768] specifies an election protocol that dynamically
assigns responsibility for a virtual router to one of the VRRP routers on a
LAN. <BR>This election process provides dynamic fail over in the
forwarding responsibility should the Master become unavailable. <BR>
</FONT><FONT face=sans-serif size=3> </FONT><FONT face=sans-serif
size=1><BR>The router survivability capability provided by the Virtual Router
Redundancy Protocol requirement: (3 * Master_Adver_Interval) + Skew_timer for
Backup Router to declare Masterdown in the VRRP [RFC 3768].</FONT><FONT
face=sans-serif size=3> </FONT><FONT face=sans-serif size=1><BR>It will be
more than 3 second when the Master_Adver_Interval was 1 second. <BR>In some
LAN environments, the Backup Router needs faster method to declare the Master
Router is fail.</FONT><FONT face=sans-serif size=3> </FONT><FONT
face=sans-serif size=1><BR>As if (2 * Master_Adver_Interval) + Skew_timer or
(1 * Master_Adver_Interval) + Skew_timer. <BR>Are there a message type which
permits the Backup Router could backup faster?</FONT><FONT face=sans-serif
size=3> </FONT><FONT face=sans-serif size=1><BR></FONT><FONT face=sans-serif
size=3> </FONT><FONT face=sans-serif size=1><BR>Best Regards </FONT>
<TABLE width="100%">
<TBODY>
<TR>
<TD width="22%">
<DIV align=center><IMG src="cid:423175715@07072009-1B3B"></DIV>
<TD width="77%"><BR>
<TABLE width="100%">
<TBODY>
<TR>
<TD colSpan=2><FONT face=sans-serif size=3><B>Dash Liu 刘志伟 ID:
183475 </B></FONT><FONT face=sans-serif size=1><BR>Chief Engineer
Office, Standard Development and Industry Relations </FONT>
<TR>
<TD rowSpan=2><IMG src="cid:423175715@07072009-1B42">
<TD><FONT face=sans-serif color=#909090 size=1><B>Product
Marketing System </B></FONT>
<TR>
<TD><FONT face=sans-serif color=#909090
size=1><B>产品市场体系</B></FONT><FONT face=sans-serif size=3> </FONT>
<TR>
<TD colSpan=2><FONT face=sans-serif size=1>D206, 889, Bibo
Road,ZhangJiang, Pudong District, ShangHai P.R.China,
210023<BR>Tel:+86-21-68896823/
13701767991<BR>Mobile:+86-13828760990</FONT><FONT face=sans-serif
color=blue size=1><U><BR></U></FONT><A
href="mailto:Email%3Aliu.zhiwei1@zte.com.cn" target=_blank><FONT
face=sans-serif color=blue
size=1><U>Email:liu.zhiwei1@zte.com.cn</U></FONT></A><FONT
face=sans-serif size=1>
</FONT></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><FONT face=sans-serif
size=3><BR><BR>_______________________________________________<BR>vrrp mailing
list</FONT><FONT face=sans-serif color=blue size=3><U><BR></U></FONT><A
href="mailto:vrrp@ietf.org"><FONT face=sans-serif color=blue
size=3><U>vrrp@ietf.org</U></FONT></A><FONT face=sans-serif color=blue
size=3><U><BR></U></FONT><A href="https://www.ietf.org/mailman/listinfo/vrrp"
target=_blank><FONT face=sans-serif color=blue
size=3><U>https://www.ietf.org/mailman/listinfo/vrrp</U></FONT></A><FONT
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