Campus Switching and Routing

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WB
New Contributor

2930f interface is not stable

Hi,

I am new to Aruba world so please help me with this crazy issue. When I do show logging. I noticed that the port I connected to PC  keep dropping. Doesn't matter what port on the switch, the switchport keep show online and offline every 5-10 seconds. However, when I connected same cable, same port from the switch to my Macbook via Thunderbolt port and ping PVID with no issue at all.  I don't know if something wrong with Duplex issue, but I'm sure that I set Auto duplex on both devices. Please check my config.

 

Status and Counters - Custom Port Status


Speed Config-mode VLAN Status
------- ------------ ----- ------
1000FDx Auto 100 Up

 

 

show logging -r

 

I 11/14/17 10:48:08 00076 ports: port 5 is now on-line
I 11/14/17 10:48:05 00077 ports: port 5 is now off-line
I 11/14/17 10:47:41 00076 ports: port 5 is now on-line
I 11/14/17 10:47:38 00077 ports: port 5 is now off-line
I 11/14/17 10:47:14 00076 ports: port 5 is now on-line
I 11/14/17 10:47:11 00077 ports: port 5 is now off-line
I 11/14/17 10:46:10 00076 ports: port 5 is now on-line
I 11/14/17 10:46:07 00077 ports: port 5 is now off-line
I 11/14/17 10:45:43 00076 ports: port 5 is now on-line
I 11/14/17 10:45:40 00077 ports: port 5 is now off-line
I 11/14/17 10:45:33 00076 ports: port 5 is now on-line
I 11/14/17 10:45:30 00077 ports: port 5 is now off-line
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Contributor II

Re: 2930f interface is not stable

Please provide details of the PC's NIC which is experiencing the issue (if the same port&patch cable were used on a Apple MacBook host without issues...the culprit is not the port and/or cable...but the NIC of your PC host). Sometime there are problematic NIC and/or NIC Device Drivers (depending on OS used)...so you should diagnose those too.

The title should be changed to better reflect the fact that the issue is not on Aruba 2930F but on a PC...since, you wrote, the same test with another host (Apple) gives totally reasonable results (links are OK on all ports).

Can you share the Switch port details too?

WB
New Contributor

Re: 2930f interface is not stable

Thanks parnassus. I just found that Npcap Loopback Adapter that causes the issue. Once I disabled it, it went back to normal. Thanks again.

Contributor II

Re: 2930f interface is not stable

Well done!

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