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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.

627 questions
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What is my NIC ID?

I need to get my NIC ID for a temporarily software license to be generated for me. How should I find my NIC ID? I have found contradictory information on the web. Some suggested that I run getmac.exe: C:\Windows\System32>getmac.exe Physical Address…
Randomblue
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NIC reporting as devXXXX and not ethX

We recently noticed our 10gE NIC was reporting as devXXXXX. Does anyone know why this would be given this name as opposed to ethX? Our System: The issue occurred on two separate servers. We are running RHEL4.9 & RHEL 4.5 which are on separate…
JMeterX
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Ubuntu Ignoring packets from network A on eth0 when eth4 configured on network A

I have an Ubuntu 12.04 (final beta, up-to-date) server with two configured network interfaces: root@mac:/home/sysadm# ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:4f:28:fd:7b inet addr:172.18.8.10 Bcast:172.18.8.255 …
jamesbtate
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Using DHCP with Multi-Homed NICs

I am trying to steer away from our current manual addressing system and embrace the decades-old wonder of DHCP. In our domain and even at my home network DHCP is great - I can use address reservations to handle the need for static IP. However, in…
tacos_tacos_tacos
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NIC bonding with two uplinks

Is bonding the preferred way of implementing ISP redundancy? In the texts I've seen, bond device has a netmask, gateway of it's own. How can this be obtained if there are two different gateways from two uplinks, which one to choose? Do I need any…
Karolis T.
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dual interface NIC with hw bridging?

I'm looking for a PCI NIC with two PHYs that is capable of bridging/switching in hardware but allows the host to monitor the traffic. Does such a thing exist? This would be running on a linux host. Edit: software bridging is not feasible for this…
bstpierre
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iSCSI / SAN / Cluster / multiple NICs failover

Got a problem with NIC failover with iSCSI. Setup: A server with 3 NICs. One NIC is local network, other 2 are SAN. Using Microsoft iSCSI Initiator. A managed network switch. A QNAP SAN, connected via iSCSI to server. Dual NIC, failover mode. All…
Dami
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vSphere NIC Teaming - Any reason for Active/Standby?

We're using ESXi and I'm wondering about the "NIC Teaming" options for our vSwitches. On a particular vSwitch with 2 NICs, is there any GOOD reason for configuring a NIC as Active and the other as Standby?. I always use Active/Active scenarios…
Craconia
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NIC Active/Passive bonding with priority

I will configure a bond of three NIC's. I want to define which one will be first used and which NIC will be used as the second and third NIC when failover is done. Is this possible? Thanks
user28362
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Why NIC ring parameters are not pre-set at their Hardware max capabilities?

Check the NIC ring buffer: # ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096 Current hardware settings: RX: 256 RX Mini: 0 RX Jumbo: 0 TX: 256 One…
CrazyRabbit
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Routing issue for windows with multiple NICs

I have a routing issue on a windows box. The windows box has three NIC's with ip's: 10.87.6.27 (no gateway set) 10.87.11.27 (no gateway set) 10.87.60.51 (gateway = 10.87.60.254) When I contact a host in 10.87.11.0/24 (for example 10.87.11.212) the…
Koen Van den Maegdenbergh
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What does rx_csum_offload_errors mean?

I see too many rx_csum_offload_errors on ethtool output and it constantly increases. What is the reason of these errors and how can I fix it? # ethtool -S enp12s0f0 | grep error rx_errors: 0 tx_errors: 0 rx_over_errors: 0 …
ibrahim
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Hyper-V 2016 Server and NIC Teaming

I am setting up a new Hyper-V 2016 server. The physical machine has 6 network ports. I read that it is best practice to have one network port dedicated to remote management of the Hyper-V Host, so that leaves me with 5 ports. I have 2 subnets - a…
E C
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What do the numbers in square brackets of ethtool output mean?

I'm looking at NIC statistics and can't find any info about these numbers: [0],[1]..[7] like here: [root@machine-1 ~]# ethtool -S enp21s0f0 NIC statistics: [0]: rx_bytes: 23048043995115 [0]: rx_ucast_packets: 15462207866 [0]:…
John
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4 NICs or 4-port NIC?

I want to setup a firewall handling two ISP connections and two routers. For that I am planning to use an old Pentium 3 machine. Now, should I use four network interface cards or a 4-port NIC? Do both do the same job? Please advice.
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