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New Member

MPSL PE and CE with ospf

Dear Expert,

please help to view this topology  and check:

MPLS-Lap.jpg

Everyone's tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Silver

MPSL PE and CE with ospf

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

3 REPLIES
Hall of Fame Super Silver

MPSL PE and CE with ospf

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

New Member

MPSL PE and CE with ospf

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

Bronze

MPSL PE and CE with ospf

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