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Beginner

Powered down computers periodically connecting and disconnecting

Hello everybody,

 

our campus network is completely based on Cisco technology, access switches are mostly c2960x-48ts, firmware

c2960x-universalk9-mz.152-4.E7.bin. Small number of computers (10-20 out of more than 1000) generates lots of LINEPROTO-5-UPDOWN and LINK-3-UPDOWN log records. While these computers are up (both Windows and Linux) they work fine with no records in logs. But when users shut their computer down, the machine starts connecting and disconnecting periodically, the log looks like this:

 

2019-10-17T02:58:42.991297+02:00 192.168.100.50 807987: Oct 17 02:58:41.986 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T02:58:43.988613+02:00 192.168.100.50 807988: Oct 17 02:58:42.985 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T02:58:46.790825+02:00 192.168.100.50 807989: Oct 17 02:58:45.782 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T02:58:46.791444+02:00 192.168.100.50 807990: Oct 17 02:58:46.785 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T02:59:08.110791+02:00 192.168.100.50 807991: Oct 17 02:59:07.104 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T02:59:09.113926+02:00 192.168.100.50 807992: Oct 17 02:59:08.111 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T02:59:11.908974+02:00 192.168.100.50 807993: Oct 17 02:59:10.900 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T02:59:11.909666+02:00 192.168.100.50 807994: Oct 17 02:59:11.903 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T03:00:18.797493+02:00 192.168.100.50 807995: Oct 17 03:00:17.789 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T03:00:18.798133+02:00 192.168.100.50 807996: Oct 17 03:00:18.792 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T03:00:22.790847+02:00 192.168.100.50 807997: Oct 17 03:00:21.543 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T03:00:22.791508+02:00 192.168.100.50 807998: Oct 17 03:00:22.780 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T03:00:39.441522+02:00 192.168.100.50 808003: Oct 17 03:00:38.433 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T03:00:39.442177+02:00 192.168.100.50 808004: Oct 17 03:00:39.436 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to down

2019-10-17T03:00:43.238024+02:00 192.168.100.50 808005: Oct 17 03:00:42.229 CEST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/10, changed state to up

2019-10-17T03:00:43.238692+02:00 192.168.100.50 808006: Oct 17 03:00:43.232 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/10, changed state to up

 

Several thousand times per night. They are different computers, new and old, different motherboards and different NIC manufacturers. But its only small pctg of computers in the campus. We tried replacing patch cords, connecting to different switch port, disabled speed auto negotiation and set port speed manually (tried both 1000Mbit and 100Mbit), nothing helped. Computers seem to be powered down, LED on eth card is off. Only thing that helped was disabling the onboard LAN card and installing PCIe LAN card.

 

Did anyone face such thing? Thanks for any ideas.

1 ACCEPTED SOLUTION

Accepted Solutions
Beginner

Re: Powered down computers periodically connecting and disconnecting

We eventually realized that our problems are related to the (still unresolved) Cisco bug CSCus35889:

 

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCus35889/

 

Disabling power efficient-ethernet solved our problem.

View solution in original post

5 REPLIES 5
VIP Advisor

Re: Powered down computers periodically connecting and disconnecting

Hello
Sounds like your hosts have WoL or WoWLAN feature enabled in their bios settings and they are receiving a broadcast message to turn on from the network , be it either by a  wired on wfi connection.

Have you tried disabling the Wol or WoWLAN feature on these hosts?
Do you have a port security applied to you network if not apply some especially for broadcast?
Do you have directed broadcasts enabled on you l3 interfaces if so disable it?

 

 



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Beginner

Re: Powered down computers periodically connecting and disconnecting

Thank you. No, we verified BIOS settings and WoL is disabled on those machines.IMG_1784.jpg

Hall of Fame Community Legend

Re: Powered down computers periodically connecting and disconnecting

Wake on LAN.
Beginner

Re: Powered down computers periodically connecting and disconnecting

WoL was one of our initial thoughts but it is not the case. It is disabled in BIOS.
Beginner

Re: Powered down computers periodically connecting and disconnecting

We eventually realized that our problems are related to the (still unresolved) Cisco bug CSCus35889:

 

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCus35889/

 

Disabling power efficient-ethernet solved our problem.

View solution in original post

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