07-03-2012 08:16 PM
07-09-2012 09:17 AM
Hello Samne,
have a look at the OSPF sham link concept to deal with backdoor links between sites like the link between R1 and R8 in your network diagram.
see
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_ospf_com_backbone.html
In order to build a working setup you need to have area 0 on PE-CE links on both sites and then you need an OSPF sham link between the PE nodes. The sham link will allow to build routes as O routes instead of O IA and this will allow to move traffic from direct link between sites.
Your current setup with non zero area connected to PE nodes with different area-id does not allow to move traffic from direct link to MPLS L3 VPN service
Hope to help
Giuseppe
07-09-2012 09:17 AM
Hello Samne,
have a look at the OSPF sham link concept to deal with backdoor links between sites like the link between R1 and R8 in your network diagram.
see
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_ospf_com_backbone.html
In order to build a working setup you need to have area 0 on PE-CE links on both sites and then you need an OSPF sham link between the PE nodes. The sham link will allow to build routes as O routes instead of O IA and this will allow to move traffic from direct link between sites.
Your current setup with non zero area connected to PE nodes with different area-id does not allow to move traffic from direct link to MPLS L3 VPN service
Hope to help
Giuseppe
07-09-2012 06:37 PM
Dear Sir,
Thank you very much for you reply, your idea very usefull for me to complete my implementation MPLS in my network.
Thanks,
Samne
07-09-2012 10:30 PM
Please look into the below post
http://www.mplsvpn.info/2008/12/what-to-ask-from-customer-if-he-demands.html
http://www.mplsvpn.info/2010/05/ospf-sham-link-in-different-area.html
regards
Shivlu Jain
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