19
votes
how to tell if NIC has multiqueue enabled?
ethtool -l <interface>
will display the status of queues associated with an interface, if that interface's driver supports such a thing. In ethtool-land, multiqueue is indicated by "channels".
...
- 988
15
votes
Multiport Server NIC ports?
These devices are typically seen in the OS as four separate network devices and they can be used just like the four separate NICs you had before.
- 99.6k
14
votes
Accepted
Hyper-V cannot ping VM from host
Long story short: remove the virtual switch from Hyper-V, recreate it, and everything worked again...
- 696
12
votes
Accepted
What fiber optic network interface card do I need for a WAN connection
You don't want to buy a "fiber card". What you want is a card (or preferably a switch) that has either SFP or SFP+ ports.
This will allow you to purchase cheap optics depending on what you need, and ...
- 110k
9
votes
e1000e Reset adapter unexpectedly / Detected Hardware Unit Hang
Disabling Enhanced C1 (C1E) in the BIOS fixed it for me.
Not sure if the lower power state of C1E is messing with the driver, or that there's an oops in the driver when the processor is in this state....
- 91
9
votes
e1000e Reset adapter unexpectedly / Detected Hardware Unit Hang
Disabling only TCP Segmentation Offload (TSO) does the trick for me.
ethtool -K eth0 tso off
Note: It does not seem to be necessary to also disable Generic Receive Offload (GRO) and Generic ...
- 285
8
votes
Accepted
Why NIC ring parameters are not pre-set at their Hardware max capabilities?
First, numbers you set aren't in bytes as many people think, they are in descriptors (and the descriptor size is hardware-dependent). So, when you increase ring length you request more memory to be ...
- 2,871
5
votes
Any 3 port NIC's made?
You can use a single port NIC and a dual-port NIC... or just use a 4-port card.
There's no real history of 3-port network add-in cards. I'm sure you can find something available in your price range. ...
- 198k
5
votes
Accepted
How do I prepare for swapping a NIC using network teaming on a Windows cluster host?
This is an important question and I'd say a more common scenario than it appears from your searching.
As you may know there are three types of teaming provided by MS Server.
1. Active / Standby
2....
- 166
5
votes
How does the host OS process frames/packets meant for VMs?
Yes.
Yes.
Yes.
It can be but doesn't by default.
When the packet arrives its destination is evaluated by its internal virtual switch to decide which VMs to send it to or if it's for its own kernel.
- 102k
5
votes
Multiport Server NIC ports?
As others have already mentioned, yes, a 4-port network card will be recognized and usable just like 4 separate network interfaces.
However, in particular with 4-port cards, you should pay attention ...
- 4,618
5
votes
Accepted
Ubuntu, two NICs but only one with internet connection
As pointed out in the above comments you have two default routes (via 192.168.1.1 and 10.0.0.1) but only the first one connects to the Internet. If the routing table remains as you posted you will ...
- 5,928
4
votes
How fast is 127.0.0.1?
As stated above, on Linux machine at least, both localhost and any other local address bypasses the NIC drivers - it is directly served by the kernel IP stack (sidenote: many ethernet hardware MAC are ...
- 50.7k
4
votes
Multiple Nics, multiple default gateways on a Server 2012R2 cluster
For every network that the cluster members have in common (having a NIC in the same subnet), the cluster will create a cluster network and enable cluster communication for that cluster network (...
- 111k
4
votes
Accepted
Choosing gateway based on Source IP in Windows
What you're looking for has two possible methods of achieving.
First is Policy-Based Routing, when a next-hop choice is made by some policy. For example this may be a route-map or simple a packet ...
- 8,756
4
votes
Accepted
Select IP's from two or more subnets
No, your gateway needs to be in the same subnet as your host address, as that's the machine you contact to get out of your subnet (it's a router).
You can have multiple subnets on the same fabric and ...
- 7,136
4
votes
Accepted
Distribute VM and force new mac address
The canonical "correct" way to distribute VM images for VMware vSphere is to distribute .ova files created using ovftool, and then use the vSphere GUI to install the .ova file. This automatically ...
- 385
4
votes
What fiber optic network interface card do I need for a WAN connection
You need to find out what standard your ISP is using before you can start shopping for hardware to connect to it.
IF it's a fiber ethernet variant then you can use a network card with a SFP/SFP+ slot ...
- 4,296
4
votes
Accepted
Hyper-V 2016 Server and NIC Teaming
Yes, IPs can be re-used.
The team will not break if you create vSwitch manually (just keep in mind to double check MAC addresses on the teamed adapter and newly created vSwitch. I had them duplicated ...
- 6,249
4
votes
Accepted
Load balancing multiple NICs on single machine presenting a virtual IP
What flavor of Linux is the server running? Do you think network teaming could work? It's the updated version of interface bonding. With teaming you can join multiple interfaces into a team in an ...
- 401
4
votes
How do I remove the VLAN ID from my NIC (Netadapter)
It's simple:
You need to write this command in PowerShell:
Set-NetAdapter -Name nic1 -VlanID 0
where nic1 is the name of your adapter.
You can check VLAN on your interfaces this command in PowerShell:...
- 41
4
votes
Debain 10 - Installing kernel 5 from backports
It's a bug in the package. The bug was already reported. The files were just missing, a patch is available in the bug report.
It works like this:
sudo su
echo deb http://deb.debian.org/debian buster-...
- 1,551
3
votes
WMI permissions for changing local IP without elevated privileges
Try making him or her a member of the local group: 'Network Configuration Operators'.
- 5,819
3
votes
Accepted
Fibre Channel Adapter as a NIC?
Is it possible to use a Fibre Channel PCIe adapter as a network
interface?
Certainly you can run IP on FC (RFC 2625) but it'll never work with your switch as that's specifically an Ethernet switch, ...
- 102k
3
votes
Accepted
Is it possible to have a link between a 10GbE NIC and 1GbE Switch with a SFP+ DAC?
I'd suggest a pair of Copper SFP adapters to connect things temporarily.
The cable you have likely isn't compatible. The PowerConnect 2824 doesn't have SFP+ ports (only SFP).
- 198k
3
votes
What is the command to flash a NIC link light?
Ethtool also works with vmware ESXi with -p parameter:
Example: ethtool -p vmnic0 15
vmnic0 will blink for 15 seconds
Here is a video that shows how it works (at 2:50 shows blink):
http://www....
3
votes
Need a script to add a second IP address to a Windows machine
Late, I know, but I think djangofan want something like that :
netsh interface ip set address "Local Area Connection" static 192.168.0.110 255.255.255.0 192.168.0.5
netsh interface ipv4 add ...
3
votes
Hyper-V cannot ping VM from host
reason is!!Firewall!!
Disable Firewall, or to be specific in the firewall settings, allow bellow app to communicate through fire wall and issue will be resolved:
File and Printer Sharing (ICMS)
- 39
3
votes
Win2012R2 NIC Teaming with LACP, but one nic has not traffic
You need multiple TCP connections over your LACP link to get aggregated performance. With only one TCP session you’ll get best NIC in the team performance and that’s it! Good wrap up and a clarifying ...
- 14.1k
3
votes
Accepted
Cobbler and PXE
You don't necessarily need to run your own DHCP/DNS server with a cobbler installation, but in order to boot properly via PXE, the DHCP server must send additional attributes to the clients (at least ...
- 99.6k
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