All Questions
Tagged with vmware-esxi networking
214
questions
0
votes
1
answer
56
views
Intel e810 nic RSS logic on ESXI platform
I am trying to decipher how RSS (Receive Side Scaling) logic works for Intel NIC on ESXI (Dell) machine.
] vsish -e cat /net/pNics/vmnic2/rxqueues/info
rx queues info {
# queues supported:8
# ...
- 175
0
votes
0
answers
79
views
Promiscuous Mode on VMware capturing only broadcast
I'm facing an issue with using promiscuous mode on VMware. I have 3 VMs connected to a single portgroup on which promiscuous mode has been enabled. It's changed to "Accept". I am monitoring ...
- 162
1
vote
1
answer
372
views
VLANs with ESXi over physical switch
I'm trying to setup a VLAN across my ESXi network and my physical switch network, but fail to get the VMs on the ESXi port group communicate with physical network. Specifically, my VM doesn't see ...
- 23
1
vote
0
answers
161
views
Werid ESXi host mac flapping issue
We have some standalone ESXi hosts in our company. Recently we encountered a werid issue where the mac address of the ESXi host flapping.
Issue description:
I found that the IP of some esxi hosts will ...
- 11
1
vote
1
answer
165
views
can't ping or nslookup outside the LAN
Ubuntu 18.04 cannot ping or nslookup outside the LAN.
When I do nslookup www.google.comit hangs for a while and returns ;; connection timed out; no servers could be reachedI cannot ping www.google.com ...
- 303
2
votes
1
answer
200
views
I need help to achieve (as close as possible) 40G network transfer speed (~1250 MB/s x 4)
I had a Gigabit network, which I upgraded recently to 40Gbps.
To do so, I replace my TPLINK switch with a Cisco Nexus 9396PX switch, which has a module with 12x 40G ports. The 40G network ...
- 21
0
votes
0
answers
46
views
VMWare ESXi Web Client access dies after some time
After applying IP filters on VMWare esxi's firewall settings for Web Access / Web Client rules, the allowed IPs work fine for some time like 5 hours.
Only the IP addresses I allow can access the ...
- 101
0
votes
0
answers
132
views
Connecting Unifi Controller running in Docker on ESXi to default VLAN while isolating other containers and container host from default VLAN
I have an ESXi 6.7 host with 6 physical NICs. Those NICs are configured as follows:
vSwitch0:
vSwitch1:
The NICs assigned to vSwitch0 are physically connected to a Netgear switch who's ports are ...
- 289
2
votes
1
answer
700
views
iperf3 errors and retransmissions on ESXi
When running iperf3 to test a 100G connection between a VMware ESXi box and a TrueNAS Core box, I'm seeing the following on the ESXi box:
The message "iperf3: getsockopt - Function not ...
- 451
0
votes
1
answer
93
views
FTP performance issues - VMWare, cisco etc
We are experiencing FTP performance issues. Looks like speed drops dramatically the more hops we are away from the server.
Cerberus FTP server, running on VMWare. 2 machines on the same VMWare host ...
- 21
0
votes
0
answers
923
views
Qemu - Cannot connect to Guest
I'm running Qemu on Windows and I can't connect to the ESXi guest and can't ping the host network gateway from the ESXi guest. I disabled all other network interface on Host machine except the ...
- 495
1
vote
0
answers
540
views
Can't make Vmware ESXi 6.7 LAG on top of Dell VLTi port-channel
So.
I've configured dell 5212F switches with 2x100G ports into VLTi domain. For some reason - when I run show vlt 10 mismatch it show that both of switches have no roles. But they appear as should in ...
- 41
1
vote
1
answer
421
views
Two bonded 10Gb nics on an ESXi guest OS not using full bandwidth
On an ESXi guest machine, with Ubuntu 18.04 operating system, two nics connected from two difference vswitch, each of them has a separate 10Gb uplink.
I made a bonded nic from these two links with ...
- 91
1
vote
1
answer
2k
views
Providing Guest VM to connect to Internet through Host on ESXi with only one adapter
I am new to virtualized environment. I have a bare-metal server provided by a hosting company which has ESXi 6.5 running on it. It has only one physical adapter, one Management Network and one VM ...
- 113
1
vote
1
answer
512
views
Active Backup for Business external VM
I am currently playing around with "Active Backup for Business" and an esxi Hypervisor hosted EXTERNALLY by "Hetzner", a Cloud provider.
My goal is that when one of my servers fail ...
- 11
0
votes
2
answers
533
views
Dell R530 Broadcom NetXtreme tg3 nic limited to 12 MBytes/sec
I have an older Dell R530:
Manufacturer Dell Inc.
Model PowerEdge R530
CPU 16 CPUs x Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz
Memory 63.78 GB
it has 8 NIC's, 3 of which are tg3, Broadcom ...
- 1,449
1
vote
1
answer
372
views
Make ESXi use DHCP DNS
My ESXi host is no longer getting DNS from DHCP server, it caches an IP that was set a very long time ago.
esxcli network ip interface ipv4 get
returns
Name IPv4 Address IPv4 Netmask IPv4 ...
- 161
1
vote
0
answers
2k
views
Unable to connect to ESXi NFC (902) from one particular LAN segment
I have an issue with Veeam Backup & Replication backups failing because the Veeam proxy servers cannot connect to the ESXi host over port 902 (NFC). The ESX hosts are on VLAN65 and the Veeam ...
- 243
0
votes
1
answer
259
views
Something is closing connections in my CentOS VMs - how to best troubleshoot?
I have a setup with 3 VMs (1 application server on CentOS6 and 2 database servers on CentOS7). The last 1-2 weeks we have had issues with timeouts when connecting to the database servers (and between ...
- 203
1
vote
0
answers
28
views
I created a static NAT internal -> public and internal -> internal. What did I do exactly that made this work?
I have two windows VM's on the same host with IIS and they're both connected to a cisco firewall. I gave each VM a static nat rule for internal -> public with their respective dedicated IP's and it'...
- 335
3
votes
2
answers
52
views
How to properly setup VMs for testing (personal test) [closed]
So both of my testing VMs are on the same laptop and both of them are running Windows Server 2019 and both of them are on the same SSD.
Basically, I need to test performance when the SQL database is ...
- 151
1
vote
1
answer
3k
views
VM inside an Esxi host does not have Internet access
I have installed an ESXi 6.7 host inside a VMware Workstation. That ESXi has one VM Ubuntu 20 server running. But that VM does not have internet access.
Here are the network settings:
ESXi host is ...
- 11
1
vote
0
answers
271
views
Move port-channel pair to new switch
So I have an old Nexus 3524 that is set up with a bunch of port-channel pairs connecting to three different ESXi hosts and four different NetApp nodes. I am replacing that with a pair of Nexus 9000's ...
- 1,368
2
votes
2
answers
7k
views
Slow network speed on ESXi hosts
I have been dealing with this problem for about half a year (had the luxury of time) and hadn't managed to crack it, so I finally resigned and came over here to ask for help from others not just ...
- 23
0
votes
2
answers
1k
views
How to run several ESXi VMs that must have the same MAC address?
For various reasons I have to run a few (≈6) clones of the same virtual machine at my lab ESXi server at work and unfortunately the MAC address must not be changed between the clones. Changing IP is ...
- 103
0
votes
1
answer
200
views
vCenter moving VM from ISCSI target to different ISCSI target
In my server lab, I am running a vCenter cluster with 2 ISCSI targets. Both of these are directly connected to switch using SFP+ port.
I assume, when I do such a process as cloning a VM from one ...
- 131
0
votes
1
answer
462
views
networking issue about virtual machine as gateway on vSphere esxi
I have configured ESXi environment as below. plus i use ESXi with vCenter 6.7. And the type of virtual switches is standard virtual switch.
Baremetal host - vSwitch0(uplink-ESXi nic0) - Gateway VM - ...
- 1
0
votes
1
answer
589
views
Assign IPv4 address to Ubuntu OVA on ESXi
How can I get an IPv4 address for an Ubuntu 1904 VM on ESXI 6.7, deployed from the Ubuntu OVA?
I'm deploying the OVA using govc, and I've provided the below spec file. Of note are the IPProtocol, ...
3
votes
1
answer
2k
views
Hyper-V Connecting to host to VM w/ External Switch
TL;DR - the short question:
Can a host be configured to be able connect to a VM being hosted by the host itself, when the VM is set to use an External Virtual Switch with the Allow management ...
- 145
0
votes
0
answers
201
views
Temporary network issue with LXC container
Good afternoon, colleagues. I have a network availability issue when running the LXC container on a VMware virtual machine. When I turn on the LXC container, about 10-15 minutes, there is no Internet ...
- 131
-1
votes
1
answer
3k
views
ESXI single vSwitch with 2 physical NICS
So I have read other question related to this and they do not help. Basically I have a network/vSwitch setup with a bunch of VMs. There are 2 NICS, each with a physical computer connected to them. For ...
- 113
0
votes
1
answer
213
views
link aggregation between vSwitch and physical switch?
Simple use case: one ESXi host installed on a physical server with two 1G NICs, both connected to one ToR physical L3 switch. The ESXi host has one vSwitch with both NICs as active uplinks, for ...
- 158
0
votes
0
answers
45
views
Communicating VM with a Router
I have a VM with 2 Virtual NIC, the first NIC has been assigned IP for communication in our ring network the second NIC has been assigned VLAN 809 and has
IP: 172.32.17.10/16 . The server with this ...
- 1
2
votes
1
answer
332
views
ESXi vDS multiple LAG
Currently network design is 2 Switches and each ESXi host has 4 NICs. 2 NICs are connected to Switch #1 and 2 NICs are connected to Switch #2. As this are different Switches it’s not possible to ...
- 153
0
votes
1
answer
164
views
common Network on 2 dedicated ESXi servers
I have two ESXi dedicated servers from a cloud vendor.
Each server has two nic card, one is private and one attached with public gateway.
ESXi 1
- i created a vSwitch0 from public NIC and VMkernal ...
- 117
8
votes
4
answers
5k
views
ESXi - Multiple Separate Concurrent Uplinks on vSwitch?
I currently have an ESXi server hosting a PFSense guest which is being used as an internet-facing router.
This ESXi server is set up with two vSwitches (each with an associated port group):
WAN - 1 ...
- 405
2
votes
1
answer
5k
views
ESXi VMs randomly lose network on reboot; only resolution to pull NICs and reassign new NIC driver with static MAC
We have one ESXi server (HP-ESXi-6.0.0 build-2492585) that has multiple VMs on it that have exhibited the following behavior:
When the VM is rebooted it will occasionally just lose all network ...
- 506
3
votes
2
answers
2k
views
constant packet loss in internal ESXI network
I am new to Vmware Esxi and im doing testing for an experiment with an Vmware ESXI 6.0.0 server. on the server there is two Ubuntu guest clients with one VMXNET3 each, both on the same Vswitch.
Upon ...
6
votes
1
answer
13k
views
syslog: kernel: [ 1241.147934] TCP: ens192: Driver has suspect GRO implementation, TCP performance may be compromised
in Debian 9 running into esxi 6.5 from three days ago the syslog shows this message:
kernel: [ 1241.147934] TCP: ens192: Driver has suspect GRO implementation, TCP performance may be compromised.
...
- 171
2
votes
0
answers
179
views
vCenter to vCenter transfers slow over 10Gbps 80ms link
We have two datacentres either side of the Atlantic with a 10Gb VPLS connection between sites with 80ms latency and better than 0.0000001% packet loss.
When moving VMs between datastores on either ...
- 918
0
votes
1
answer
2k
views
VMware ESXi VM bridge
I am currently creating a network inside a VMware ESXi host.
The network consists currently of two vSwitches and two port groups. Port Group A is associated with vSwitch0 and Port Group B with ...
- 3
2
votes
1
answer
2k
views
pfSense and ESXI WAN
I have a dedicated server which came with ESXI 6.5 pre-installed. There is just one IP dedicated to this, the management IP: 62.121.90.xx/27 from where I can log to ESXI. This instance had just one ...
- 59
-1
votes
2
answers
981
views
Recommended Duplex setting for physical NIC when doing Virtualization
What is the recommended Duplex setting for a physical network adapter when using virtualization? Let's assume that the physical network switch ports are configured for auto negotiation and support ...
- 153
2
votes
2
answers
783
views
VMware ESXi - assign IP to Windows vm
I have a VMware ESXi 6.0 server and I uploaded a Windows 7 vm on it.
I can't make internet working, I bought some IPs and they sent me this email (I don't even understand French very well):
Si vous ...
- 131
1
vote
0
answers
597
views
Unable to access docker container on LAN
My docker is running on a VmWare ESXi server (Ubuntu 16 x64 server). I installed and started the rancher container using this command:
docker run -d --restart=unless-stopped -p 9000:9000 -P --name ...
- 111
0
votes
1
answer
44
views
Best practice on forwarding traffic to VMs inside ESXI based on domain name requested?
Lets say I have a server with two ip addresses. There are 100 VMs on this server each that hosts a website whose domain names use one of the two IPs in their A records.
What's the best way to route a ...
- 97
-3
votes
1
answer
446
views
2 ESXI hosts, only one with WAN incoming, no physical switch: how to have pfsense in Host #1 provide LAN to Host #2?
This might be a very beginner question, but wondering if someone can point me in the right direction.
The following is a diagram of the physical servers (questions below it):
Both computers have ...
- 97
-2
votes
1
answer
198
views
Changed Network Label on VCenter Server VM now Unable to Connect to Reset it Back
I didn't think it through, in vSphere on my vCenter Server VM I changed the Network from VMNetwork to VMotion.
I did this with the intention of changing it back immediately, I sometimes do this as a ...
0
votes
0
answers
1k
views
Linux debian how to disable TCP checksum verification?
While trying to open a TCP Port to host B from A, I figure out there's a problem in the 3 way TCP handshake between the two hosts.
Client/Host A send a SYN to host B, Host B send a SYN/ACK, then host ...
- 101
0
votes
1
answer
247
views
VMkernel not listed in vsphere machine creation wizard
I Installed fresh ESXi 6 on my server. I connected to my server using vSphere client and add "VM Network" and "VMkernel" on vSwitch0.
I assigned valid IP address on VMkernel and want to attach it to ...
