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alsid's avatar
alsid
Follower
Jul 08, 2021

Webex and RBR750 + RBS750 connectivity issues

Hi everyone,

 

My setup:

1) Netgear Orbi RBK752 - Mesh Wifi - 2 pack system;

2) Orbi connected to ISP directly (PPPoE, VLAN 6);

3) Firmware version: V3.2.18.1_1.4.14;

4) Net speed tests are OK, 500/500, MTU is set to 1492 on hosts locally and on WAN interface;

5) Other settings: NAT open, IPv6 enabled, default DMZ host is set, WMM disabled;

6) WebEx Linux client is used.

 

Problem:

Cisco WebEx client hangs for few seconds during video calls and then reconnects. It happens randomly. Cisco WebEx network tests are green. (https://mediatest.ciscospark.com/).

 

Additional observations:

1) Using ISP modem instead of ORBI solves the problem;

2) Using mikrotik router as an intermidiate between WebEx client and Orbi solves the problem.

 

I found other posts about WebEx issues using ORBI but setup is different.

 

Are there any other hiddent ORBI settings to try out?

 

Got TCP dump from ORBI debug page, during connection problems there are many [TCP ACKed unseen segment] followed by [RST] sequences. I'm not good at analyzing TCP dumps though.

 

 

 

 

 

 

 

 

 

 

 

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