You can summarize at ABR's, just don't summarize your main Loopback/LDP-ID/BGP-ID range.
Robert Crowe Email: rocr...@cisco.com -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Rin Sent: Friday, October 22, 2010 8:25 AM To: cisco-nsp@puck.nether.net Subject: [c-nsp] OSPF design Hi group, We need to design a MPLS network that has around 100 nodes (7600) divided into Core, Aggregation & Access layer. OSPF and MPLS is deployed up to access layer. According to Cisco, an OSPF area should have no more than 50 nodes in order to minimize the database. With that concept, we should design our network into different areas, say Core & Aggregation in Area 0, Access nodes in area 1. However, I reckon separating the network into different OSPF areas without summarization at ABR cannot minimize OSPF database, all routers still receive routes advertises by other routers. If we do summarization at ABR, MPLS cannot work since this is a continuous MPLS domain. So my question is should we separate the network into different OSPF areas as Cisco recommendation or should we keep all routers in an OSPF area 0? Note that we intend to provide MPLS L2VPN, L3VPN on this network; we can only use OSPF, ISIS is not an option. Thanks, Rin _______________________________________________ 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/ _______________________________________________ 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/
