A quick check returns the following subnets being both BGP and Tunnel routed:
44.135.193.0/24
44.136.227.0/24
44.137.0.0/16
44.161.230.0/24
44.161.252.0/22
44.188.128.0/20
44.208.0.0/16
44.48.16.0/24
There are more networks within 44.161.0.0/16 which are reachable via IPIP and BGP, but for
BGP we aggregate networks where possible so that the more specific networks are announced
via RIPv2 and IPIP tunnels.
The idea here is to support IPIP and BGP concurrently while preferring IPIP. Additionally
we also run BGP over other tunnel protocols ( GRE, SSTP, etc) with more specific
preferences depending on the agreement between the Ops. AFAICT this setup is the only way
wich allows both the IPIP-only and the BGP-only sites to reach our networks.
vy 73 de Marc, LX1DUC