SWITCHlan Trouble Tickets

Transparency is very important to us. We therefore publish all trouble tickets about issues that have an impact on our customers. We show both currently open tickets as well as all closed tickets.

Ticket 20071120_1

Ticket Number: 20071120_1Ticket State: CLOSED
Ticket Opened: 2007-11-19 17:50Ticket Closed: 2007-11-23 17:25
Ticket Description: DWDM transceiver problem in Neuch√Ętel

Problem Description:

On Sunday Nov 18, 2007, 11:20, the concatenated Ethernet link channel 15/31:4 GE-EL-NE-OL-ZH went down. This incident was not considered a serious problem, as this particular channel isn't connected to router ports anywhere.

Port 4 of the DWDM quad GE transceiver mNE12-c3 located in Neuch√Ętel, which started to flap every couple of minutes at that time, is suspected to be the root of the problem.

Affected:

From 2007-11-18 11:20 until undefined
Impact: slightly reduced redundancy
Sites/Services: UNINE


Actions:


2007-11-23 17:19
The defective module has been successfully replaced. All Gigabit Ethernet channels between Geneva and Zurich are back to normal operation. Routing metrics have been reset as well.

2007-11-22 16:30
Update from Deltanet: the new transceiver has arrived. I has been tested and preconfigured already. The replacement is scheduled for Friday afternoon.

2007-11-19 17:45
Update from Deltanet: a replacement transceiver has been ordered from Sorrento Europe in Stuttgart

2007-11-19 14:30
The operational link el2 - ne2 stops working after a card restart. Traffic is flowing through alternative links both in western and eastern directions

2007-11-19 14:00
Problem escalated to Deltanet Support


For all questions about this ticket, please send mail to noc@switch.ch
or call +41 44 268 15 30.