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 To: 'Kanagaraj 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
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
On Nov 21, 2006, at 10:08 PM, Doug Marschke wrote:
I need this info to understand why a certain upstream is being more prefered than the others. Thanks.
I believe that PacketDesign's Route Explorer may be helpful in answering questions of this type: http://www.packetdesign.com ----------------------------------------------------------------------- Roland Dobbins <rdobbins@cisco.com> // 408.527.6376 voice All battles are perpetual. -- Milton Friedman
I use the FCP from internap...Optomizes the BGP routes and produces nice graphs/reports that I never look at... :) http://www.internap.com/solutions/routecontrol/page1980.html Doug Marschke <doug@ipath.net> wrote: v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} I dont 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 To: 'Kanagaraj 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 --------------------------------- Cheap Talk? Check out Yahoo! Messenger's low PC-to-Phone call rates.
Hi Doug, How about cisco? In juniper, 'show route detail' really helps. Thanks. Regards, Kana ----- Original Message ----- From: Doug Marschke To: 'Kanagaraj Krishna' Cc: nanog@merit.edu Sent: Wednesday, November 22, 2006 2:08 PM Subject: RE: BGP analyzing tool 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 To: 'Kanagaraj 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
participants (4)
-
Doug Marschke -
Jon Lyons -
Kanagaraj Krishna -
Roland Dobbins