VPN s2s PA and Mikrotik

[_slv_]

Hello

I have new tas - make VPN s2s between PA200 and Mikrotik router.

PA  (PA 200 on 6.1.4) has Advanced phase mode 1 optios set to AUTO and "anable passive mode" not checked

Mikrotik (751U-2HnD with latest 6.30 router OS) is in aggressive mode.

It's quite simple task, few policy rules on PA and on Mikrotik side. Configuration similar to PA<>Cisco.

I got strange resoults, everything seems to be OK.usually tunnel is working, hosts on both sides could ping each other, but ...

sometimes doesn't.

example 1:

I'm able to ping from A side to B, but not from B to A (packed rejected)

example 2

Side A pinging side B, ping from B to A doesnt working UNTIL I stopped ping from A to B

example 3

Mikrotik shows Installes SAs:

Is it normal that on PA side Auth is none and Enc Algoritms is none?

Has anyone any idea whats going on?

At the moment (about 5min later than I created screenshots above) Ping from B to A started working - is it kind of mystery or what?

Help me please

[_slv_]

Hello

In daily report I got:

Device SN Virtual System Rule Bytes Sessions

001606004XXX vsys1 VPN-s2s-local-networks 1021.08 M 129.84 k

It's mean that security rule that allowing traffic between A and B  transfered ~1GB and generates 130000 sessions. Thats pretty much sessions - why?

I used TotalCommander to upload and download 2,4GB ISO files, so I genereated more than 5GB traffic I think.

Second problem, using ping from A to B gateway I got aroung 10-17% loss of ping packet - is it  normal?

Regards

Slawek