Re: BGP study question
OK, Let's see if my reading serves me correctly. Using the MED attribute cannot be used here for the simple fact that there is only one connection between each pair of ASs. Yes, the MEDs is non-transitive but it's real/only use is between a pair of AS that are directly connected in more than one place. Now knowing that you would prefer that routerB to use routerC this preference can be set using your LOCAL-PREF. Of course the result is that the higher the value the more preferred the route. The point to note here is that this preference could be established through an E-BGP, IGP, or a static configuration. HTH'd, it sure helped me clear up some areas in my thought process. The CertificationZone has a 3 part paper on BGP written by Howard B.(The BGP Master) as Priscilla pointed out in an earlier post. A subscription there will only aide in your battle to master this beast as well it's the only way you'll get the luxury of being able to read all three Papers. *hint, hint* Nigel.. - CZ subscriber..! - Original Message - From: John Kaberna To: [EMAIL PROTECTED] Cc: Kristopher B. Climie Sent: Friday, September 15, 2000 8:28 AM Subject: Re: BGP study question Its pretty simple actually. Basically they both accomplish the same thing. But the local pref is exactly that. Local to the AS. MED values are carried in to the next AS. But, when an AS receives a MED value it does not propogate that value to other AS's. Maybe someone else can explain it a little better. John Kristopher B. Climie <[EMAIL PROTECTED]> wrote in message news:B5E6AFD0.28AB%kris@climiecc...> Here is a question I am just going to throw out there:> > > Look at the example below. Router B has two connections out of its network> to router D, one through router A and router C. All are running eBGP. What> is the best way to get Router B to use Router C, using the MED or the> Local_Pref? Why?> > > > -- > | |> | |> | |> ---> > **NOTE: New CCNA/CCDA List has been formed. For more information go to> http://www.groupstudy.com/list/Associates.html> _> UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html> FAQ, list archives, and subscription info: http://www.groupstudy.com> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: BGP study question
Its pretty simple actually. Basically they both accomplish the same thing. But the local pref is exactly that. Local to the AS. MED values are carried in to the next AS. But, when an AS receives a MED value it does not propogate that value to other AS's. Maybe someone else can explain it a little better. John Kristopher B. Climie <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:B5E6AFD0.28AB%kris@climiecc...> Here is a question I am just going to throw out there:> > > Look at the example below. Router B has two connections out of its network> to router D, one through router A and router C. All are running eBGP. What> is the best way to get Router B to use Router C, using the MED or the> Local_Pref? Why?> > > > -- > | |> | |> | |> ---> > **NOTE: New CCNA/CCDA List has been formed. For more information go to> http://www.groupstudy.com/list/Associates.html> _> UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html> FAQ, list archives, and subscription info: http://www.groupstudy.com> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: BGP study question
It depends on whether you want to control inbound traffic or outbound traffic. If you want to control inbound traffic, use MED, if you want to control outbound traffic, use Local Preference. Luobin Yang "Kristopher B. Climie" wrote: > Here is a question I am just going to throw out there: > > Look at the example below. Router B has two connections out of its network > to router D, one through router A and router C. All are running eBGP. What > is the best way to get Router B to use Router C, using the MED or the > Local_Pref? Why? > >-- >|| >|| >|| > --- > > **NOTE: New CCNA/CCDA List has been formed. For more information go to > http://www.groupstudy.com/list/Associates.html > _ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: BGP study question
The MED, and if they are cisco routers, the weight. If you want to prefer router C for outbound traffic, then logically, you want inbound traffic to come the same way. The local pref is not passed to the Peer, so it would only affect outbound traffic. Addittionally the MED has more "influence" than the Local Pref Original Message Follows From: "Kristopher B. Climie" <[EMAIL PROTECTED]> Reply-To: "Kristopher B. Climie" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: BGP study question Date: Thu, 14 Sep 2000 16:39:45 -0400 Here is a question I am just going to throw out there: Look at the example below. Router B has two connections out of its network to router D, one through router A and router C. All are running eBGP. What is the best way to get Router B to use Router C, using the MED or the Local_Pref? Why? -- | | | | | | --- **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
BGP study question
Here is a question I am just going to throw out there: Look at the example below. Router B has two connections out of its network to router D, one through router A and router C. All are running eBGP. What is the best way to get Router B to use Router C, using the MED or the Local_Pref? Why? -- || || || --- **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
