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Questions tagged [gigabit-ethernet]

Ethernet at 1000 Mb/s (1 Gb/s). Can be over copper or fiber. There are different types of fiber.

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Why do some VPN clients slow down the network connection even when they are not it use?

I work as an I.T. consultant, and I often have to install various VPN clients on my computer in order to connect to customer's networks; beginning in March 2020, I started always working from home for well known reasons. Until a couple months ago I…
Massimo
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How to enable ethernet 1 Gigabit advertising or troubleshoot the situation?

On an Debian Stretch box, I have a Gigabit ethernet network adapter, but this mode is not active (however displayed as supported). Does this depend on the peripheral condition (i.e. cable is not good enough, another one box has an older i.e. only…
J. Doe
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What is bottlenecking my SMB share?

I set up a SMB/CIFS share on my FreeNAS box (Xeon E3-1220v5, 8GB DDR4 RAM) and I noticed that transfer rates are limited to ~70 MB/s, while I can easily get around 110 MB/s via WebDAV and using iperf I can achieve the complete theoretical maximum of…
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How do I increase the ring parameters for a NIC on a Linux server

I used the ethtool utility to increase the rx and tx values for the NIC on one of our servers. I ran the following command: ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: 2040 RX Mini: 0 RX Jumbo: 8160 TX: …
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Any benefit and/or risk in enabling Jumbo Frames for the DAG replication network?

Exchange 2013 DAG, two nodes, a dedicated GBE network interface on each server for replication traffic, connected to a GBE switch, using a dedicated VLAN. Is there any benefit to Exchange replication traffic in enabling Ethernet Jumbo Frames both on…
Massimo
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Testing network connectivity on a server with Gigabit Ethernet

I have a box with Gigabit Ethernet, and I'm unable to get past about 200Mbps or 250Mbps in my download tests. I do the tests like this: % wget -6 -O /dev/null --progress=dot:mega http://proof.ovh.ca/files/1Gb.dat --2013-07-25 12:32:08-- …
cnst
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Maximum throughput on switch with different link speeds

While doing some benchmarking on a network app I discovered strange behavior that involves 100MBit and 1GBit ethernet clients connected through a switch (at-gs900/8e). I have one server (Gbit) and multiple clients, the network app uses TCP/IPv4. The…
Simon
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What could cause two devices to refuse to link?

This is a curious case where all the devices at hand will link with one another, except for two that just won't detect one another. One device is a single board computer (SBC) with a gigabit nic, the other is a fancy managed gigabit switch. If I…
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Are there any vendors making a Gigabit Fiber solution for laptops?

I'm trying to build a laptop system that can connect to just about any network you might come across in a large enterprise. I realize I can use a media converter to go from twisted pair to fiber but prefer to have a NIC instead of a converter. Is…
romandas
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Cheap gigabit switch?

Does anyone have any recommendations for a cheap gigabit switch? I'm starting to outgrow my WRT54GL router.
Anthony Giorgio
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iSCSI Transfer Rate Using Standard Gigabit Networking

We just purchased a dell storage server with (12) 7200 RPM SATA drives running RAID 10 and (4) gigabit network interface cards. Additionally it has a PERC H700 controller card with 512MB of on-board cache. We will be attaching hypervisors to the…
Justin
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Intel NIC: VMDc or VMDq?

I need to buy a nic that I want to eventually (~3 months) re-use for a VM server deployment that will need to support heavy network I/O. Server is a Xeon Gulftown/Westmere-EP. Intel has server NICs that support VMDc, VMDq, or both. Which is the…
nonot1
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Ethernet switch capacity question

We're looking at hooking up 48 small embedded systems with 10/100 Ethernet ports to an Ethernet switch and then have that switch talk to a server upstream via a faster connection. I have a couple of questions about that scenario: What kind of…
Andrew Queisser
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SAN over Ethernet

We are looking to move our infrastructure from our office to a COLO. Currently we run a rack-mount white-box server using commodity hardware, and ESXi 4 as the hypervisor to power 9 VM's for internal development/DC/Exchange etc. We are looking to…
Darbio
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Link mode on unmanaged gigabit switches

I have two RJ45 sockets connected by an inaccessible unknown-category twisted pair cable. I plug two unmanaged gigabit switches into the sockets using Cat6 cables, and they negotiate a 100Mbps link. I suppose there's nothing I can do to try and get…
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