The question is, What your service provider suggest? Do they provide multiple eBGP sessions for CE, if yes they might want you to use it instead of static route and you might end with load balancing, route filtering so and so....Well If you are going to use redundant eBGP you need to make it sure that you are getting correct next-hop interface while running with ISDN backup and vice versa...
The easiest way you use static route for backup interface if it is being supported :) Yea You can use Dialer watch as well as IPSLA or dialer watch along with IPSLA... Regards, Masood Ahmad Shah -----Original Message----- From: Ali, Rijas: BB UAE (IT) [mailto:[EMAIL PROTECTED] Sent: Thursday, January 31, 2008 7:17 PM To: Masood Ahmad Shah; Zitouni Rachid; cisco-nsp@puck.nether.net Subject: RE: [c-nsp] ISDN backup for MPLS CE Router Friend, My CE has e-BGP with service provider PE. If the MPLS link is down or some routing issue with in MPLS cloud, my CE will dial in to my ISDN 3845 aggregator in my HO. If the link comes back / BGP is UP with PE , my CE should disconnect ISDN and work normally . I am not planning for ISDN redundancy with MPLS service provider. should I go with Dialer watch / IPSLA ? ALI RIJAS Network - Consultant Barclays Bank PLC 1st Floor, Building 4, Emaar Business Park, Sheikh Zayed Road, PO Box. 1891, Dubai, UAE (Dir): +971 4 3626703 (Mob): +971 50 6525497 (Fax): +971 4 3663133 (Email): [EMAIL PROTECTED] Weekend: Friday & Saturday Registered Office in England: Registered No. 1026167, Registered Office: 1 Churchill Place London E145HP -----Original Message----- From: Masood Ahmad Shah [mailto:[EMAIL PROTECTED] Sent: Thursday, January 31, 2008 5:41 PM To: 'Zitouni Rachid'; Ali, Rijas: BB UAE (IT); cisco-nsp@puck.nether.net Subject: RE: [c-nsp] ISDN backup for MPLS CE Router I believe that you side is CE ---> PE. One thing is very important to know that you must reach your PE in appropriate manners while connecting using ISDN circuit.. If you want to use automatic failover and just can't run routing protocols..you can use IPSLA monitor If you can't use routing protocol your choice is IP SLA monitor. How to IPSLA: ip sla monitor 1 type echo protocol ipIcmpEcho primary-link-reachable-ip source-ipaddr switch-source-ip timeout 1500 threshold 2000 frequency 3 Start Monitring: ip sla monitor schedule 1 life forever start-time now Tracking: track 1 rtr 1 reachability Secondary Route: ip route 0.0.0.0 0.0.0.0 secondary-gateway track 1 Regards, Masood Ahmad Shah -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Zitouni Rachid Sent: Tuesday, January 22, 2008 8:45 PM To: Ali, Rijas: BB UAE (IT); cisco-nsp@puck.nether.net Subject: Re: [c-nsp] ISDN backup for MPLS CE Router Hi, Use dialer watch: http://www.cisco.com/en/US/tech/tk801/tk379/technologies_configuration_examp le09186a0080094143.shtml On CE : you will need your default route to PE to be suppressed when CE-PE link fail somewhere => dynamic routing is the easier way to do it Obviously, your Head Office CE will need to know that the link between branch office CE and PE went down.... HiH Rachid ________________________________ De : Ali, Rijas: BB UAE (IT) [mailto:[EMAIL PROTECTED] Envoyé : mardi 22 janvier 2008 14:34 À : Zitouni Rachid; cisco-nsp@puck.nether.net Objet : RE: [c-nsp] ISDN backup for MPLS CE Router The CE will have ISDN WIC and it should dial out to my Head Office ISDN Aggregator (Cisco 3845) when the default route from ISP is missing. After this if at all there is a problem in MPLS cloud ( either ETH going down / route missing )from service provider data will flow Via ISDN . ALI RIJAS -----Original Message----- From: Zitouni Rachid [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 22, 2008 5:19 PM To: Ali, Rijas: BB UAE (IT); cisco-nsp@puck.nether.net Subject: RE: [c-nsp] ISDN backup for MPLS CE Router Just to make sure I understand your topology : ISDN will be CE-PE or CE-CE ? -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Ali, Rijas: BB UAE (IT) Envoyé : mardi 22 janvier 2008 14:05 À : cisco-nsp@puck.nether.net Objet : [c-nsp] ISDN backup for MPLS CE Router Hi Friends, Most of my branches connect to MPLS service provider using a ETH port on my CE. I am thinking of having a ISDN Backup for the MPLS VPN Link. Since ETH its very rare that the interface go down, So I have to look for the default route that ISP gives to my CE and if not available I will have to start ISDN. Please help me with some of your experience or documentation. ALI RIJAS This e-mail and any attachments are confidential and intended solely for the addressee and may also be privileged or exempt from disclosure under applicable law. If you are not the addressee, or have received this e-mail in error, please notify the sender immediately, delete it from your system and do not copy, disclose or otherwise act upon any part of this e-mail or its attachments. Internet communications are not guaranteed to be secure or virus-free. The Barclays Group does not accept responsibility for any loss arising from unauthorised access to, or interference with, any Internet communications by any third party, or from the transmission of any viruses. Replies to this e-mail may be monitored by the Barclays Group for operational or business reasons. Any opinion or other information in this e-mail or its attachments that does not relate to the business of the Barclays Group is personal to the sender and is not given or endorsed by the Barclays Group. Barclays Bank PLC.Registered in England and Wales (registered no. 1026167). Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom. Barclays Bank PLC is authorised and regulated by the Financial Services Authority. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ This e-mail and any attachments are confidential and intended solely for the addressee and may also be privileged or exempt from disclosure under applicable law. If you are not the addressee, or have received this e-mail in error, please notify the sender immediately, delete it from your system and do not copy, disclose or otherwise act upon any part of this e-mail or its attachments. Internet communications are not guaranteed to be secure or virus-free. The Barclays Group does not accept responsibility for any loss arising from unauthorised access to, or interference with, any Internet communications by any third party, or from the transmission of any viruses. Replies to this e-mail may be monitored by the Barclays Group for operational or business reasons. Any opinion or other information in this e-mail or its attachments that does not relate to the business of the Barclays Group is personal to the sender and is not given or endorsed by the Barclays Group. Barclays Bank PLC.Registered in England and Wales (registered no. 1026167). Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom. Barclays Bank PLC is authorised and regulated by the Financial Services Authority. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ This e-mail and any attachments are confidential and intended solely for the addressee and may also be privileged or exempt from disclosure under applicable law. If you are not the addressee, or have received this e-mail in error, please notify the sender immediately, delete it from your system and do not copy, disclose or otherwise act upon any part of this e-mail or its attachments. Internet communications are not guaranteed to be secure or virus-free. The Barclays Group does not accept responsibility for any loss arising from unauthorised access to, or interference with, any Internet communications by any third party, or from the transmission of any viruses. Replies to this e-mail may be monitored by the Barclays Group for operational or business reasons. Any opinion or other information in this e-mail or its attachments that does not relate to the business of the Barclays Group is personal to the sender and is not given or endorsed by the Barclays Group. Barclays Bank PLC.Registered in England and Wales (registered no. 1026167). Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom. Barclays Bank PLC is authorised and regulated by the Financial Services Authority. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/