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Khoa Pham's Tech Blog » 2014 » March

Archive

Archive for March, 2014

1GB SFP on Cisco Nexus 5000

March 19th, 2014 Comments off

I’m setting up a new Nexus 5000 vpc cluster. For the keep alive links, I used the old 1GB SFP modules because the links don’t send much traffic. However, it didn’t work

1 sfp

Now that’s interesting because from the Cisco Datasheet, it says

Supported Tranceiver Options:
Cisco SFP-10G-SR 10GBASE-SR SFP+ module (MMF)
Cisco SFP-10G-LR 10GBASE-LR SFP+ module (SMF)
Cisco SFP-H10GB-CU1M 10GBASE-CU SFP+ cable 1m (Twinax cable)
Cisco SFP-H10GB-CU3M 10GBASE-CU SFP+ cable 3m (Twinax cable)
Cisco SFP-H10GB-CU5M 10GBASE-CU SFP+ cable 5m (Twinax cable)
Cisco GLC-T 1000BASE-T SFP
Cisco GLC-SX-MM GE SFP, LC connector SX transceiver (MMF)
Cisco GLC-LH-SM GE SFP, LC connector LX/LH transceiver (SMF)
Cisco SFP-GE-T 1000BASE-T SFP, extended temperature range
Cisco SFP-GE-S GE SFP, LC connector SX transceiver (MMF), extended temperature range and digital optical monitoring (DOM)
Cisco-SFP-GE-L GE SFP, LC connector LX/LH transceiver (SMF), extended temperature range and DOM
Cisco DS-SFP-FC4G-SW 4-Gbps Fibre Channel SW SFP, LC (for Fibre Channel expansion module ports)
Cisco DS-SFP-FC4G-LW 4-Gbps Fibre Channel LW SFP, LC (for Fibre Channel expansion module ports)
Cisco DS-SFP-FC8G-SW 8-Gbps Fibre Channel SW SFP+, LC (for Fibre Channel expansion module ports)
Cisco DS-SFP-FC8G-LW 8-Gbps Fibre Channel LW SFP+, LC (for Fibre Channel expansion module ports)

So I spent a little bit of time playing with the config. It turned out that you have to tell the switch to run at 1Gb on the SFP

2 sfp

I’m on the newest version of Nexus, ver 7.0 N1(1). Not sure why it doesn’t auto-detect the speed. The NX-OS is still evolving, stay tuned for more tips and tricks.

Categories: Uncategorized

Cisco UCS : Tracing packet paths with a MAC address

March 14th, 2014 Comments off

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