[93469] in North American Network Operators' Group
RE: BGP analyzing tool
daemon@ATHENA.MIT.EDU (Doug Marschke)
Wed Nov 22 01:10:21 2006
From: "Doug Marschke" <doug@ipath.net>
To: "'Kanagaraj Krishna'" <kanagaraj@aims.com.my>
Cc: <nanog@merit.edu>
Date: Tue, 21 Nov 2006 22:08:34 -0800
In-Reply-To: <004601c70de1$d7874e40$6b86dfcb@Kana2>
Errors-To: owner-nanog@merit.edu
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I don't know of any tool, but it seems like you should be able to get a show
route detail about, write a script to choose inactive reasons and sort based
off that.
Doug
_____
From: Kanagaraj Krishna [mailto:kanagaraj@aims.com.my]
Sent: Tuesday, November 21, 2006 6:57 PM
To: Doug Marschke
Cc: nanog@merit.edu
Subject: Re: BGP analyzing tool
Using cli like "sh ip bgp xxx.xxx.xxx.xxx"[Cisco] or "sh route protocol bgp
xxx.xxx.xxx.xxx detail" [Juniper] would be able to show me details for
specific destinations. What i need is a software to get all the data from a
routers routing table, analyze the best path and summarize the reason why
its being chosen based on the BGP algorithm (local pref, no. of hops, MED,
etc). That would show the big picture of why a certain upstream is more
prefered than the other. Thanks.
Regards,
Kana
----- Original Message -----
From: Doug Marschke <mailto:doug@ipath.net>
To: 'Kanagaraj <mailto:kanagaraj@aims.com.my> Krishna'
Sent: Wednesday, November 22, 2006 10:09 AM
Subject: RE: BGP analyzing tool
What kind of router? A juniper will show you this with a show route detail.
Doug
-----Original Message-----
From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of
Kanagaraj Krishna
Sent: Tuesday, November 21, 2006 6:27 AM
To: nanog@merit.edu
Subject: Re: BGP analyzing tool
Hi,
Are there any available BGP analyzing tool that can be used to identify
details on best chosen path based on the BGP algorithm? NTOP can capture the
traffic info, but to analyze each destination to find the reason for
selection
(local preference, no of AS hops, iBGP vs eBGP etc) would be hard. I need
this
info to understand why a certain upstream is being more prefered than the
others. Thanks.
Regards,
Kana
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I don’t know of any tool, but =
it
seems like you should be able to get a show route detail about, write a =
script
to choose inactive reasons and sort based off =
that.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Doug<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D3 width=3D"100%" align=3Dcenter tabindex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
Kanagaraj
Krishna [mailto:kanagaraj@aims.com.my] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Tuesday, November =
21, 2006
6:57 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> Doug Marschke<br>
<b><span style=3D'font-weight:bold'>Cc:</span></b> nanog@merit.edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: BGP =
analyzing tool</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Using cli like "sh ip bgp
xxx.xxx.xxx.xxx"[Cisco] or "sh route protocol bgp
xxx.xxx.xxx.xxx detail" [Juniper] would be able to show me =
details
for specific destinations. What i need is a software to get all the data =
from a
routers routing table, analyze the best path and summarize the =
reason why
its being chosen based on the BGP algorithm (local pref, no. of hops, =
MED,
etc). That would show the big picture of why a certain upstream is more
prefered than the other. Thanks.</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Regards,</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Kana</span></font> <o:p></o:p></p>
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<blockquote style=3D'border:none;border-left:solid black =
1.5pt;padding:0in 0in 0in 3.0pt;
margin-left:3.0pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>=
<div>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>----- Original Message ----- =
<o:p></o:p></span></font></p>
</div>
<div style=3D'font-color:black'>
<p class=3DMsoNormal style=3D'background:#E4E4E4'><b><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span=
></font></b><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> <a
href=3D"mailto:doug@ipath.net" title=3D"doug@ipath.net">Doug =
Marschke</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=3D2
face=3DArial><span style=3D'font-size:10.0pt;font-family:Arial'> <a
href=3D"mailto:kanagaraj@aims.com.my" =
title=3D"kanagaraj@aims.com.my">'Kanagaraj
Krishna'</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font =
size=3D2
face=3DArial><span style=3D'font-size:10.0pt;font-family:Arial'> =
Wednesday,
November 22, 2006 10:09 AM<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font =
size=3D2
face=3DArial><span style=3D'font-size:10.0pt;font-family:Arial'> RE: BGP =
analyzing
tool<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>What kind of router? A juniper will show you this with a =
show
route detail.<br>
<br>
Doug<br>
<br>
-----Original Message-----<br>
From: <a href=3D"mailto:owner-nanog@merit.edu">owner-nanog@merit.edu</a>
[mailto:owner-nanog@merit.edu] On Behalf Of<br>
Kanagaraj Krishna<br>
Sent: Tuesday, November 21, 2006 6:27 AM<br>
To: <a href=3D"mailto:nanog@merit.edu">nanog@merit.edu</a><br>
Subject: Re: BGP analyzing tool<br>
<br>
<br>
Hi,<br>
Are there any available BGP analyzing tool that can be used =
to
identify <br>
details on best chosen path based on the BGP algorithm? NTOP can capture =
the<br>
<br>
traffic info, but to analyze each destination to find the reason for<br>
selection <br>
(local preference, no of AS hops, iBGP vs eBGP etc) would be hard. I =
need<br>
this <br>
info to understand why a certain upstream is being more prefered than =
the <br>
others. Thanks.<br>
<br>
Regards,<br>
Kana<o:p></o:p></span></font></p>
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