Any good ideas about migrating a small eBGP based network to iBGP ?
The setup is:
Super core with two L3 switches running as AS 65001
About five other network areas connected via this as AS 65002, 65003 etc
Each network block has two eBGP L3 switches so everything is dual homed to the core.
They are thinking of switching from eBGP to iBGP for this in preparation for going multi-vrf with MPLS L3VPN with the core becoming just MPLS P devices and the network block eBGP routers becoming PEs. A couple of route reflectors would also be introduced. This is all on one large site over Ethernet no WAN involved. Each network block and the core has its own OSPF area 0 as an IGP.
The issue is that its a 24/7 operation and they need to keep the network running through the migration.
I know we could do MPLS L3VPNs over eBGP as well but they already have another site that was implemented as iBGP form the start so they would like to make both sites the same if possible for simplicity of support.
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