I've had a PPTP VPN running between two datacenters for a long ruime using RB1100AHx2 (Last version to run was 6.22)
We recently upgraded one site to CCR1009 running 6.35.1
Its a identical setup of bridges, pptp's etc. But we are seeing problems with file copies that dont work and SQL replication that doesn't work. If I swap over to its backup router (another RB1100AHx2), everythign goes back to normal.
If I inspect the traffic of a pcap, it looks like a mess compared to the RB1100.
1MByte packet capture while running on the CCR has 20x TCP RSTs, 55 ooo segments, 400 duplicate ACKs
running via RB1100AHx2 I get no RST, no ooo segments, and 12 duplicate ACKs. Its like night and day.
If I change the pptp to an SSTP, everything works, but with a lot more CPU overhead and increased latency, but the applications actually work.
I then upgraded the backup RB1100AHx2 from 6.22 to 6.35.1.
When it uses PPTP, then no problems, but CCR = bad packet loss issue.
I'm also logging a support request, but thought other may have input.