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SSTP accepts client MTU up to 16384 bytes
Closed, ResolvedPublicFEATURE REQUEST
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Description

[email protected]# set service sstp-server network-settings mtu 44

  Number 44 is not in the range 128-16384

  Invalid value
  Value validation failed
  Set failed

As this is a point to point link which runs over an IP network I do not know if a MTU up to 16k makes sense at all. I would expect a maximum MTU of 1500bytes minus the overhead of SSTP?

Please correct me if I'm wrong.

Details

Difficulty level
Easy (less than an hour)
Version
1.3-rolling-202001311637
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Behavior change
Issue type
Improvement (missing useful functionality)

Event Timeline

c-po assigned this task to Dmitry.Feb 1 2020, 10:01 AM
c-po triaged this task as Normal priority.
c-po created this task.
c-po changed Difficulty level from Unknown (require assessment) to Easy (less than an hour).
c-po changed Version from - to 1.3-rolling-202001311637.
c-po changed Is it a breaking change? from Unspecified (possibly destroys the router) to Behavior change.
pasik added a subscriber: pasik.Feb 1 2020, 2:02 PM
c-po changed the task status from Open to In progress.Mar 20 2020, 3:34 PM
c-po claimed this task.
c-po added a subscriber: Dmitry.
runar added a subscriber: runar.Mar 20 2020, 4:14 PM

As the mtu on an ip network could exceed 1500b it is not so strange to allow larger than 1500b frames on the tunnel. But this could be adjusted to follow the max mtu values on ethernet interfaces. As taken from my head max mtu on ethernet is about 9000b

c-po closed this task as Resolved.Mar 20 2020, 9:52 PM
c-po moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus board.Mar 22 2020, 8:52 AM
erkin set Issue type to Bug (incorrect behavior).Aug 31 2021, 5:47 PM
erkin changed Issue type from Bug (incorrect behavior) to Improvement (missing useful functionality).
syncer edited projects, added VyOS 1.3 Equuleus (1.3.0); removed VyOS 1.3 Equuleus.Aug 30 2022, 2:03 PM
syncer moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus (1.3.0) board.