Wan Optimization Support

Technical => Troubleshooting => : fxadmin May 17, 2018, 04:00:07 PM

: Wanos Services incl. WebGUI become unresponsive after some time
: fxadmin May 17, 2018, 04:00:07 PM

I'm in the process of evaluating Wanos. Initial test look promising but I'm facing the problem mentioned in the title. Use-case is:
svn repo synchronization over low performance OpenVPN Site-to-Site links.

Network-Architecture: SVN Server HQ -> Wanos HQ (Tunnel-mode) -> Firewall HQ -> OpenVPN Site 2 Site Link -> Firewall BO -> Wanos BO (Tunnel-mode) -> SVN Server BO

Setup works as expected (but only without tcp-x), peers are healthy, optimization ratios look promising and during "normal use" no issues came up.
But when I try to do the initial repo sync with long-term link saturation the WebGUI times out after some time and data stops to flow/svnsync becomes unresponsive (resulting in a broken repo with tons of zombie-locks). most of the time it happens with the BO-Appliance but sometimes also on the HQ-end. Local login on the VMs is still possible and normal operation resumes after a reboot. 

Log on operational HQ-VM:
[Thu May 17 11:17:30 2018] : Info : ph All data stores ready
[Thu May 17 11:17:35 2018] : Info : comp1 clearing force stateless.
[Thu May 17 11:25:10 2018] : Info : decomp1 reset decompressor stream
[Thu May 17 12:47:04 2018] : Error : stacker_tx_peer1 attempting to send empty stacker packet.
[Thu May 17 13:13:13 2018] : Warn : rsp_peer1 maximum retransmits reached, changing mode to server. HQ-IP -> BO-IP

Log on failing BO-VM:
[Thu May 17 11:17:13 2018] : Info : comp1 clearing force stateless.
[Thu May 17 11:17:33 2018] : Info : rsp_peer1 connection reset
[Thu May 17 11:17:33 2018] : Info : comp1 hard setting force
[Thu May 17 11:17:35 2018] : Info : comp1 clearing force stateless.
[Thu May 17 11:25:17 2018] : Info : decomp1 reset decompressor stream
Can't return outside a subroutine at /tce/etc/wanos/wanos-show line 32.
Can't return outside a subroutine at /tce/etc/wanos/wanos-show line 32.
[Thu May 17 13:17:19 2018] : Info : Stopping Wanos Servic

Software Version (both ends): 4.2.1 Plus 2/20 (Trial license)

Please advice/let me know if more info is required.

: Re: Wanos Services incl. WebGUI become unresponsive after some time
: ahenning May 17, 2018, 08:27:01 PM

Recommended action:
Set WAN Tx rate to link rate on both sides.
Clear datastores on both sides manually.
Check if this resolves the issue.

Re TCP-X:
Wanos is probably not able to find the routes it needs to reach the source/destination and additional static routes may be needed.