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brodie7838
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Joined: Thu Oct 20, 2011 5:10 pm

SSTP Tunnel suddenly slow and losing packets

Mon Jan 02, 2023 1:11 am

I have CHR set up on AWS as a SSTP server for several branch offices to tunnel back to for management & monitoring. Each branch office has a RB450Gx4 and everything including the CHR are running 7.6 Stable. This has operated flawlessly without any problem for months until today when one of the SSTP tunnels started acting slow and I noticed latency is jittery and in the hundreds of ms with large bouts of 100% packet loss.

The other office routers aren't having any problems and the configs are identical with no changes made recently. I've rebooted both CHR and office RB and enabled logging for the SSTP topic but the only thing it reports are standard looking echo request/response keepalives; there are no errors before or after the bouts of packet loss, and the tunnel itself doesn't seem to actually go down. I get no loss or jitter going directly to the office RB's WAN to/from the CHR and WAN stats all look perfect on both ends as well.

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