Jump height different in LAN and server modes?

I've been testing the map I'm working on in LAN mode so no one can connect to it.

Everything runs fine and I can jump over walls 32 units high

When I run it normally and a server is made (not a dedicated one) the
jump height seems to be cut in half and I can just barely jump over
benches and have no chance of jumping over the 32unit high walls...
gameplay on my map is ruined because of this.

Also the physics are horrible, and when I walk into props and try to
jump over them its all jittery. I imagine this is just because its not
a dedicated server, though I would think it would perform better than
that with just me on.. it runs fine in LAN mode.

This happens to me with any map its not specific to mine.

The main thing Im worried about is the jump height because it totally
ruins gameplay not being able to jump over hardly anything. I never
changed any server settings so why is there so much difference between
LAN and server modes?? I thought 32 was the height you are
supposed to be able to jump so I dont know why I cant jump that high in
server mode.

I think the physics are worse over the internet than over LAN:s. Probably to reduce the ammount of lag.

You could enclose your whole map in a trigger_gravity brush and set the
"Gravity" to 0.9 to improve the gameplay on your map.

when can you jump a 32 unit high wall, and when cant u jump over it?

If Im running in LAN mode I can jump 32 units high. If I run hl2dm
normally so that it makes an internet server, I cant jump that high.

You should be able to duck-jump a wee bit under 64 units, test that too.

I just did some more testing. Strangely sv_gravity is always at 600.

I may have found a bug that needs to be fixed.

I have narrowed it down to specific circumstances:

• Start hl2dm with -sv_lan 1 in the command line (or type that in the console after loading the game)

• Use the map command in the console to change maps

If you click the Create Server option the bug will not happen. It only
happens if the first map you go to is with the map command, while
sv_lan 1

To see this test with dm_lockdown. In the bathroom you will be able to
easily jump over the wall between the sinks when the bug is in effect.
Otherwise you cant even jump onto a sink without doing a duck jump!