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Questions tagged [sfp]

Small form-factor pluggables are mostly optical, modular transceivers for gigabit or 10 gigabit (SFP+) network connections.

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How to troubleshoot SFP+ connection flapping between two linux servers?

I'm trying to set up an SFP+ connection between two servers. The port keeps flapping. root@routeur:~# dmesg|tail [20266.254806] ixgbe 0000:04:00.1 eno8: NIC Link is Up 10 Gbps, Flow Control: RX/TX [20266.259946] ixgbe 0000:04:00.1 eno8: NIC Link is…
Cyrnaonyx
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Why Cisco port is not connected but other side come up

On my Cisco Catalyst 3850 there is a SFP Module which is connected to another device, the port on the Other device (vendor equipment) come up but my interface is still down. The DOM Information show me receive and transmit pegel and if I do a shut…
kockiren
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Linux optical 10Gbe networking, how to diagnose performance problems?

I have a small cluster consisting of 3 servers. Each has two 10Gbe SFP+ optical network cards. There are two separate 10Gbe switches. On all servers one NIC is connected to switch 1, second NIC is connected to switch 2 to provide fault…
Mateusz Bartczak
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CX4 Infiniband to SFP+ Converter

It may be a weird question, but I'm facing the following problem at the moment: I've got a DELL PowerConnect 6248 Switch (managed Gigabit-Ethernet) with the YY741-Stacking module in the back. The module has two ports for CX4 10GBit. However, I need…
Yannik Z.
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Direct attach sfp+ cables (passive) connection issues after power restoration

I have got two servers with SFP+ capable network cards connected to the Unifi Switch uplink ports. Each of the servers has its own UPS and the switch shares the UPS with one of the servers. The servers are connected using direct attach cables…
petr
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SFP Card compatibility

We are installing our first "professional" server configuration in the office. We will install a HP ProLiant DL120 Gen9 that will provide a hypervisor based on CentOS / KVM and should be connected to a Synology RS818+ via iSCSI to access the virtual…
rlw
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How to replace an SC-Duplex-switch with an SFP switch?

Currently I have some switches in our network, which use (besides the Fast Ethernet ports) also optical fiber with two SC-Duplex-Connectors (one in and one out). Now I want to replace these old devices by a newer model, but unfortunately modern…
user3297416
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How to Connect a Core Switch with an Edge/Client Switch using SFP+ Ports

I am not sure if this is the correct site to post this question and I am more a software type of guy that needs to get started with Networking, so please bear with me if this sounds stupid... Having said that here is my situation: I am considering…
philips
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Is it possible to have a link between a 10GbE NIC and 1GbE Switch with a SFP+ DAC?

I've just installed an Intel 82599 based NIC with 2 SFP+ ports in my server. Right now I have a PowerConnect 2824 switch, which has 2 1Gb SFP ports. I tried linking them with a 10Gb SFP+ DAC (a 10gtek, bought as compatible with Dell), but there was…
Rodrigo Gómez
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Fiber optic cable connection to switch not working

I am currently working in a project which uses a 12 core SM fiber optic cable running 40 km. Switched are connected in ring topology. Distance between two switches will be max 8 km and i am having 11 switches placed in 40 km. Now between two…
Vinay Singh
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SFP+ Cable From Uplink Port to SFP+ 10Gb NIC

I have a specific question about using a this 2m passive SFP+ cable to connect the 10Gb uplink port on a switch to a NIC in a server. Switch: Netgear GS752TXS Server NIC: HP NC522SFP I'm fairly confident that the switch and server NIC are fine, but…
John Davis
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Intel 10Gbps NIC not working within Solaris 11

I'm working within Solaris 11.1 on hardware that is on the Solaris 11 HCL. My Intel X520-DA2 is failing to initialize. Jun 14 03:11:32 ATM-Front-End-1 ixgbe: [ID 611667 kern.warning] WARNING: ixgbe1: Failed to initialize adapter Here is the…
Copy Run Start
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CISCO WS-C4948-10GE SFP+?

I have a pair of CISCO WS-C4948-10GE's that we need to connect to a new switch that has SFP+ and QSFP ports. Is there an X2 module that supports this? If so, can someone name the part number that will work? I have found some information, but want to…
Brian Lovett
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tcpdump on a capture card

I have a server with a NT20E Capture Card (2x10Gb Packet Capture Card over PCI Express). I want to be able to dump the output to a pcap format but because this isn't listed as an ethX-interface tcpdump is unable to capture data. My question now: how…
timmeyh
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meaning of 1GE/5GE SFP in Cisco Switches

What is meaning of "1GE/5GE SFP Ports" in switches. What does it stand for? I dont have much knowledge of networking, but I just wanted for information. Thanks
Meraman Karmur
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