From RFC 793:
To be sure that a TCP does not create a segment that carries a
sequence number which may be duplicated by an old segment remaining in
the network, the TCP must keep quiet for a maximum ...
loop(220.127.116.11) - routerA (192.168.1.2)--------- (192.168.1.1) routerB - loop(18.104.22.168)
I have eBGP peering configured with a Multihop of 2 on both sides and static routes to reach loopbacks.