T10000C - Constant Link Protocol State Changes (Doc ID 2075630.1)

Last updated on NOVEMBER 27, 2022

Applies to:

Goal

· In order to implement the OKM Encryption Appliances we needed to set up IP networks into which we connected the T10000C tape drives (as well as the Appliances).

· For one of these sites we used the 3COM switch that arrived with the SL8500s. This is a dumb switch which is incapable of sending messages to our SYSLOG server. We implemented two 3COM switches in that site. One for the local tape LAN and one for the remote key management and ILOM LAN.

· For the other three sites  the distance to the gateway for the management/ILOM LAN was too great. Consequently we implemented Cisco 2960S switches.

· When we plugged the Appliances into the Cisco switch all worked correctly.

· When we plugged the tape drives into the Cisco switch the error messages started being generated. All three sites were exactly the same. We disabled the 8 tape ports on each Cisco to stop the message flood.

Cisco messages:

10:15:23 NOTICE LOCAL7 Sep 10 07:15:22.521: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
10:15:25 NOTICE LOCAL7 Sep 10 07:15:24.523: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up

10:16:23 NOTICE LOCAL7 Sep 10 07:16:22.522: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
10:16:25 NOTICE LOCAL7 Sep 10 07:16:24.525: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up

10:17:23 NOTICE LOCAL7 Sep 10 07:17:22.524: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
10:17:25 NOTICE LOCAL7 Sep 10 07:17:24.527: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up

What is a little strange is that the link is dropped by each tape drive at exact one minute intervals.

Solution

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