RE: BGP and Select path for a AS [7:36947]
Holá Alfredo, si tienes dos connexiónes a la misma destinación (CarrierA y CarrierB), me parece que lo mejor que puedes hacer es configurar el atributo 'weight'. Puedes usar listas de acceso, route maps, o el 'neighbor weight command'. Hay un ejemplo muy bien en el sitio web siguiente: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtocid2043919 Busca por 'BGP Decision Algorithm', entonces 'Weight Attribute'. Recuerdos, Jorge Hi Alfredo, if you have two different connections (CarrierA and CarrierB) to the same destination, it would be best to configure the weight attribute. You can use either access lists, route maps, or the 'neighbor weight command' to achieve this. There is a very good example on the Cisco site, go to: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtocid2043919 Look for 'BGP Decision Algorithm' and then for the 'Weight Attribute' link. Regards, Georg Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=36953t=36947 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: BGP and Select path for a AS [7:36947]
You could prepend AS numbers to the path going out to Carrier A and set local preference in IBGP to prefer the routes to Carrier B. This would force all incoming and outgoing traffic to Carrier B until an outage. Alfredo Pulido wrote in message news:[EMAIL PROTECTED]; Hello, (English) I have two connections for two diferents Carriers (Carrier A and Carrier B), at present for access to the ASx the BGP protocol route this path for Carrier A and I would like route this ASx ALWAYS for Carrier B. Is it possible ? How to configure ? (Espaqol) Yo tengo 2 conecciones a internet por 2 carriers diferentes (carrier A y carrier B), actualmente para acceder al ASx el BGP me enrouta por el carrier A pero me gustarma que me enrutara ese ASx SIEMPRE por el carrier B, es posible configurar eso? y como se hace ? Sincerely -- Alfredo Pulido [EMAIL PROTECTED] Dept. Sistemas, IdecNet S.A. Juan XXIII 44 // E-35004 Las Palmas de Gran Canaria, Las Palmas // SPAIN Tel: +34 828 111 000 Fax: +34 828 111 112 http://www.idecnet.com/ -- Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=36959t=36947 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: BGP and Select path for a AS [7:36947]
This isn't a complete solution though, as you've done nothing to influence the traffic that is coming back into your network. In addition to the steps mentioned below, you will want to AS-Path prepend your the connection that you want to use as the backup. This will get 99% of the traffic to come back to you via the preferred link. The only reason it isn't a 100% guarantee is because some AS's may implement a policy that overrides your as-path prepend. I can help you set this up if you need assistance. Ejay Hire CCNA, CCNP 434-591-4564 [EMAIL PROTECTED] -Original Message- From: Georg Pauwen [mailto:[EMAIL PROTECTED]] Sent: Friday, March 01, 2002 7:58 AM To: [EMAIL PROTECTED] Subject: RE: BGP and Select path for a AS [7:36947] Hola Alfredo, si tienes dos connexisnes a la misma destinacisn (CarrierA y CarrierB), me parece que lo mejor que puedes hacer es configurar el atributo 'weight'. Puedes usar listas de acceso, route maps, o el 'neighbor weight command'. Hay un ejemplo muy bien en el sitio web siguiente: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtocid20439 19 Busca por 'BGP Decision Algorithm', entonces 'Weight Attribute'. Recuerdos, Jorge Hi Alfredo, if you have two different connections (CarrierA and CarrierB) to the same destination, it would be best to configure the weight attribute. You can use either access lists, route maps, or the 'neighbor weight command' to achieve this. There is a very good example on the Cisco site, go to: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtocid20439 19 Look for 'BGP Decision Algorithm' and then for the 'Weight Attribute' link. Regards, Georg Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=36970t=36947 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
