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Questions tagged [nic]

A Network Interface Card is a computer component which connects to a physical network in order to send and receive data.

321 questions
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15 answers

How can I get the IP address from a NIC (network interface controller) in Python?

When an error occurs in a Python script on Unix, an email is sent. I have been asked to add {Testing Environment} to the subject line of the email if the IP address is 192.168.100.37 which is the testing server. This way we can have one version of a…
Memor-X
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3 answers

docker-compose: specify which interface will connect to each network (when having multiple networks)

Inside the docker-compose.yaml I define 4 different networks: networks: vpp-nw: vpp-client: vpp-server: vpp-db: which use the following network addresses respectively: 172.20.0.x 172.21.0.x 172.22.0.x 172.23.0.x One of the containers I…
tgogos
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1 answer

descriptor concept in NIC

I am trying to understand the concept of Rx and Tx descriptors used in Network driver code. Are Descriptors in software(RAM) or hardware (NIC card). How do they get filled. EDIT: So in a Realtek card driver code. I have a following struct…
Haswell
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Docker - how to set iface name when creating a new network

After creating a new network with: docker network create test-net and running ifconfig on the host, a new interface name is being listed: br-f2b630e4e141 Link encap:Ethernet HWaddr 02:42:48:fe:cb:86 inet addr:172.18.0.1 Bcast:0.0.0.0 …
tgogos
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7 answers

Programmatically disable/enable network interface

I'm trying to come up with a solution to programmatically enable/disable the network card - I've done a ton of research and nothing seems to be a workable solution in both XP and Vista environments. What I'm talking about is if you went into the…
Mark
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1 answer

What does the meaning of "[fixed]" string in output of ethtool command

I run ethtool to query the offload features of a NIC using "ethtool -k" command, and the output is something as follows: ethtool -k eth0 scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: off **[fixed]** I am wondering what the…
leivli
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3 answers

Differentiate VMware network adapter from physical network adapters -or- Detect Virtual Network Adaptor

I have to differentiate between the real addresses and the VM addresses using any Windows API. I'm using GetAdaptersAddresses API to populate a list of IP addresses for the local machine. I need to extract only the "real" addresses apart from the…
Venkat
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2 answers

PyVmomi add NIC with unconnected dvs ('config.distributedVirtualSwitch' is Unset)

I am using the code below in order to add a NIC configured with DistributedVirtualSwitch to an existing VM (via pyVmomi): def __AddNIC(si, vmconf_dict, network_name): vm = __get_vm(si, vmconf_dict) print " Network label : " + network_name …
Vano
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6 answers

Programmatically check whether my machine has internet access or not

How can I programmatically check whether my machine has internet access or not using C/C++, is it just a matter of pinging an IP? How does NIC do it ? I mean something like: I am using Windows 7.
Aan
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3 answers

What is the relationship of DMA ring buffer and TX/RX ring for a network card?

I know that for a network card, OS must allocate tx/rx rings for it so that when OS wants to receive/transmit packets, the network card will know where the packets are and which packets are to be transmit. And when I read about DMA, I see something…
4va1anch3
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5 answers

Failed to start bean 'webServerStartStop'; Unable to start embedded Tomcat server - spring-boot-starter-web

Spring application using Maven including only Spring Web dependency gives "Unable to start embedded Tomcat serve" error. The same project runs on other computers like expected. Spring Boot Version: 2.4.3 Package Type: JAR Java Version: 11 No…
Callanbr
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4 answers

JAVA set / choose specific NIC from multiple (UDP)

I am trying to send UDP with datagram in JAVA and my machine have several NIC with different IP's. How can I set which NIC I want my packet to be sent from ?? (assuming I have more than one on the machine ??) EDIT I I am not using Socket, I am using…
user1722362
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1 answer

How to view vendor information of my NIC?

How to get the vendor information of my NIC on top of Ubuntu? I wanna get its vendor, type and things like that? Any shell commands available? Thanks in advance.
user1072898
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2 answers

ixgbe: setting the number of RX/TX queues

I want to set the number of RX/TX queues used by an Intel 10G NIC. Let me explain why: I am using an Intel 10G NIC of type X520, on a Dell R720 system. I am using ixgbe version 3.6.7-k. The kernel in Ubuntu 3.2.0-59. I am running my network…
Ofir Hermesh
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1 answer

Getting Linux interface traffic 64bit statistics in userspace

I would like to get the NIC driver 64bit statistics in userspace, in the simplest way possible. The man page of API function getifaddrs(), suggests a simple example program that does it using 32bit "struct rtnl_link_stats" (possible to see it here…
user9250533
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