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Hi Seb, Thanks for your suggestion. Actually we need to land the /32 IPs in TG first as we have to associate this subnet with a routing table in TG. Hence a direct Tunnel from the Hub site to Palo Alto is not a favourable solution for me.
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Loopback is configured on router in at a HUB site and we want to ping the IP of an instance in VPC-1. We are advertising the loopback IP (/32) from HUB site as shown in the above diagram. Loopback will be advertised from Hub site to TG (Transit gateway in AWS) via BGP , then this will be advertised from TG to Palo Alto firewall. Again from Palo Alto firewall this loopback should be advertised back to TG and from TG to destination VPC 1. Can we advertise the loopback IP from firewall back to TG vis BGP route advertisement. If yes , then how.
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