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Re: TE metric and graceful restart



Don,

> I have a question. Do you mean that a node that is restarting
> its routing view and learning from it's neighbors should mark 
> the TE metrics to local neighbors to infinity? 

That is correct.

> I think that during 
> any graceful restart the TE metrics will not have a perfect view 
> and local path selections should be blocked but setting the metrics
> artificially to infinity seems like the wrong way to do this in my
> opinion. 

Why ? And what is in your opinion the correct way to do this ?

Yakov.

> 
> Don
> 
> > -----Original Message-----
> > From: Alex Zinin [mailto:zinin@psg.com]
> > Sent: Friday, April 26, 2002 2:55 PM
> > To: Yakov Rekhter
> > Cc: ccamp@ops.ietf.org
> > Subject: Re: TE metric and graceful restart
> > 
> > 
> > Yakov,
> > 
> >   How does this improve the situation given that
> >   unreserved BW of 0 is already announced?
> > 
> > -- 
> > Alex
> > 
> > Thursday, April 25, 2002, 12:47:57 PM, you wrote:
> > > Folks,
> > 
> > > It was suggested to set the TE metric to infinity during graceful
> > > restart (both for ISIS and OSPF). 
> > 
> > > Any objections to this suggestion ???
> > 
> > > Yakov.
> > 
> > 
> > 
> 
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> <P><FONT SIZE=2>Yakov </FONT>
> </P>
> 
> <P><FONT SIZE=2>I have a question. Do you mean that a node that is restarting
</FONT>
> <BR><FONT SIZE=2>its routing view and learning from it's neighbors should mar
k </FONT>
> <BR><FONT SIZE=2>the TE metrics to local neighbors to infinity? I think that 
during </FONT>
> <BR><FONT SIZE=2>any graceful restart the TE metrics will not have a perfect 
view </FONT>
> <BR><FONT SIZE=2>and local path selections should be blocked but setting the 
metrics</FONT>
> <BR><FONT SIZE=2>artificially to infinity seems like the wrong way to do this
 in my</FONT>
> <BR><FONT SIZE=2>opinion. </FONT>
> </P>
> 
> <P><FONT SIZE=2>Don</FONT>
> </P>
> 
> <P><FONT SIZE=2>&gt; -----Original Message-----</FONT>
> <BR><FONT SIZE=2>&gt; From: Alex Zinin [<A HREF="mailto:zinin@psg.com";>mailto
:zinin@psg.com</A>]</FONT>
> <BR><FONT SIZE=2>&gt; Sent: Friday, April 26, 2002 2:55 PM</FONT>
> <BR><FONT SIZE=2>&gt; To: Yakov Rekhter</FONT>
> <BR><FONT SIZE=2>&gt; Cc: ccamp@ops.ietf.org</FONT>
> <BR><FONT SIZE=2>&gt; Subject: Re: TE metric and graceful restart</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; Yakov,</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt;&nbsp;&nbsp; How does this improve the situation given t
hat</FONT>
> <BR><FONT SIZE=2>&gt;&nbsp;&nbsp; unreserved BW of 0 is already announced?</F
ONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; -- </FONT>
> <BR><FONT SIZE=2>&gt; Alex</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; Thursday, April 25, 2002, 12:47:57 PM, you wrote:</FONT
>
> <BR><FONT SIZE=2>&gt; &gt; Folks,</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; &gt; It was suggested to set the TE metric to infinity 
during graceful</FONT>
> <BR><FONT SIZE=2>&gt; &gt; restart (both for ISIS and OSPF). </FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; &gt; Any objections to this suggestion ???</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; &gt; Yakov.</FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> <BR><FONT SIZE=2>&gt; </FONT>
> </P>
> 
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