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<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2>If you have all three links connected as layer 2 then yes
you have a loop. There are many ways to mitigate against this, my preference is
RSTP (rapid spanning-tree) - which is easy to run and troubleshoot.
</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2>You could make the NI the root bridge and then run RSTP -
you should be able to work out which is fwding and which will be discarding. You
also need to decide if you want to run per vlan RSTP or a single instance of
STP. Looking at your network, I would run a simple single spanning tree
instance. Pm me if you want to know how to do this.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2>Umar.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=254535415-09022007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Vincent De Keyzer
[mailto:vincent@dekeyzer.net] <BR><B>Sent:</B> 09 February 2007
15:53<BR><B>To:</B> Umar Ahmed; foundry-nsp@puck.nether.net<BR><B>Subject:</B>
RE: [f-nsp] Foundry's equivalent of Cisco's Gig X/Y.Z<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Ok thanks, that what I
thought.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Now, say there is a
triangle:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">
NI400<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">
/
\<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">
/ \<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">
/
\<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">FES12GCF------
FES12GCF<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Port 1 of the NI400 is
connected to first switch, port 2 to second switch.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">I would then
do:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">vlan
100<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'"> tag port
eth 1/1 et 1/2<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'"> router-interface
ve100<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Do I then need to run
STP or MRP between the 3 boxes to avoid a layer 2 loop
?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Or is there a way to
prevent the NI from switching between eth 1/1 and eth 1/2
?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma">Vincent<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none">
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=3>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN lang=EN-US
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Umar Ahmed
[mailto:Umar.Ahmed@vanco.co.uk] <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> vendredi 9 février 2007
16:43<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Vincent De Keyzer;
foundry-nsp@puck.nether.net<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [f-nsp] Foundry's equivalent
of Cisco's Gig X/Y.Z</SPAN></FONT><SPAN lang=EN-US><o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">try</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">vlan
100</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">tag eth
(slot/port)</SPAN></FONT><o:p></o:p></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">router-interface ve100</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">!</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">int ve
100</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">ip address
x.x.x.x/y</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Umar.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=3>
</SPAN></FONT></DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma size=2><SPAN
lang=EN-US
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
foundry-nsp-bounces@puck.nether.net [mailto:foundry-nsp-bounces@puck.nether.net]
<B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Vincent De
Keyzer<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> 09 February 2007
15:18<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
foundry-nsp@puck.nether.net<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [f-nsp] Foundry's equivalent of
Cisco's Gig X/Y.Z</SPAN></FONT><SPAN lang=EN-US><o:p></o:p></SPAN></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Hello,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">question from a beginner: on a
NI400, how do I do the equivalent of Cisco’s<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">interface Gig
X/Y.Z<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> encapsulation dot1q
100<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> </SPAN></FONT><FONT
face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">ip address A.B.C.D
M.M.M.M<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Vincent<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
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