[SOLVED] Windows 11 No Internet on 10GB Network Connection

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ks1

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Mar 14, 2025
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I have 2 network connections, 1 GB and 10 GB. On my 1 GB connection I can get an Internet Connection with my Windows 11 VM. When switch to my 10 GB connection on the VM, I have no internet connection. Both network connections are on the same subnet as shown in the screenshot below. I have Linux Bridge setup for 1 GB on vmbr0 and the 10 GB on vmbr1. 1 GB connection is for management and 10 GB connection want to use for the VM's. From the 10 GB switch I can ping the Internet and Proxmox Host on both IP's on Linux Bridges. From the Proxmox Host, I can also ping the Internet.
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I am using the paravirtualized drivers as shown below and have them installed on my VM. I have tried using both DHCP and Static Addressing on my VM, but still no Internet connection. Doubled checked my IP addressing when set to static on the VM and it is correct. I had my other Administrator look at it too and could not find anything wrong.
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I have tried changing the MTU on 10 GB connection but still no Internet, so I set it back to 1500. Any suggestions to try, I would appreciate it.
 

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Thank you for your response. Looked at the thread above, but removing the IP from the 10 GB Linux Bridge did not change anything. I still have no Internet connection on my Windows 11 VM on my 10 GB network connection. Any more ideas of what I can check? Thanks

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A good starting point could be, to not disconnect (link_down=1) the vNIC, no?
 
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I missed the disconnect (link down). The disconnect is no longer checked and the link is not showing down as shown below but still did not fix the issue with no Internet on the VM. Still Stumped on this one.
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Show output from the Proxmox host for:

Code: 
ip a

cat /etc/network/interfaces

cat /etc/hosts

cat /etc/resolv.conf

hostname

Please post this in the code-editor, as I have done above.
 
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Code: 
root@USEDCPRX01:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: eno5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether d4:f5:ef:a1:5e:bc brd ff:ff:ff:ff:ff:ff
    altname enp93s0f0
3: eno6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d4:f5:ef:a1:5e:bd brd ff:ff:ff:ff:ff:ff
    altname enp93s0f1
4: eno7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d4:f5:ef:a1:5e:be brd ff:ff:ff:ff:ff:ff
    altname enp93s0f2
5: eno8: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d4:f5:ef:a1:5e:bf brd ff:ff:ff:ff:ff:ff
    altname enp93s0f3
6: ens3f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master vmbr1 state DOWN group default qlen 1000
    link/ether a0:36:9f:e5:be:b8 brd ff:ff:ff:ff:ff:ff
    altname enp19s0f0
7: ens3f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9216 qdisc mq state UP group default qlen 1000
    link/ether a0:36:9f:e5:be:ba brd ff:ff:ff:ff:ff:ff
    altname enp19s0f1
    inet6 fe80::a236:9fff:fee5:beba/64 scope link
       valid_lft forever preferred_lft forever
8: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether d4:f5:ef:a1:5e:bc brd ff:ff:ff:ff:ff:ff
    inet 10.10.254.75/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::d6f5:efff:fea1:5ebc/64 scope link
       valid_lft forever preferred_lft forever
9: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a0:36:9f:e5:be:b8 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::a236:9fff:fee5:beb8/64 scope link
       valid_lft forever preferred_lft forever
10: tap101i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr1 state UNKNOWN group default qlen 1000
    link/ether 56:4a:d1:01:4c:b6 brd ff:ff:ff:ff:ff:ff



root@USEDCPRX01:~# cat /etc/network/interfaces

auto lo
iface lo inet loopback

iface eno5 inet manual

iface eno6 inet manual

iface eno7 inet manual

iface eno8 inet manual

auto ens3f0
iface ens3f0 inet manual
        mtu 1500

auto ens3f1
iface ens3f1 inet manual
        mtu 1500

auto vmbr0
iface vmbr0 inet static
        address 10.10.254.75/24
        gateway 10.10.254.254
        bridge-ports eno5
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge-ports ens3f0
        bridge-stp off
        bridge-fd 0

source /etc/network/interfaces.d/*



root@USEDCPRX01:~#cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
10.10.254.75 USEDCPRX01.company.local USEDCPRX01

# The following lines are desirable for IPv6 capable hosts

::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts



root@USEDCPRX01:~# cat /etc/resolv.conf
search company.local
nameserver 10.10.254.245



root@USEDCPRX01:~# hostname
USEDCPRX01
 
The bridge port for vmbr1 is ens3f0, but that one has NO-CARRIER; so no physical connection/link...
 
Neobin said:
The bridge port for vmbr1 is ens3f0, but that one has NO-CARRIER; so no physical connection/link...
Click to expand...
I believe the OP has already realized this, from the ip a output I requested, & he subsequently liked my post, so I surmise that he has realized that the cable (10GB) is incorrectly connected to ens3f1 (which has BROADCAST) instead of ens3f0.
 
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gfngfn256 said:
I believe the OP has already realized this, from the ip a output I requested, & he subsequently liked my post, so I surmise that he has realized that the cable (10GB) is incorrectly connected to ens3f1 (which has BROADCAST) instead of ens3f0.
Click to expand...
Thank you, I knew it was probably something simple, but was not sure what. Running the commands, rather than looking at the GUI, solved the problem.
 
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