KVM bridged network with static IPs works great for guests, but is flaky for host
After a seemingly random amount of time I cannot access (ping/ssh/http) a KVM host but can access its guests from anywhere. Restarting the network doesn't fix it. Restarting the machine does. All machines & VMs have static IPs. The network is configured with systemd.network, not netplan, because thats how the hosting provider set it up.
On ubuntu 64 bit 18.04.2 I can set up a bridge with these files in /etc/systemd/network
br0.netdev
[NetDev]
Name=br0
Kind=bridge
br0.network
[Match]
Name=br0
[Network]
Description=network interface on public network, with default route
DHCP=no
Address=x.x.x.x/24
Gateway=x.x.x.x
IPv6AcceptRA=no
NTP=ntp.ovh.net
DNS=127.0.0.1
DNS=x.x.x.x
DNS=x.x.x.x
Gateway=x:x:x:ff:ff:ff:ff:ff
[Address]
Address=x:x:x::/64
[Route]
Destination=x:x:x:ff:ff:ff:ff:ff
Scope=link
uplink.network
[Match]
Name=eno1
[Network]
Bridge=br0
From the host I can ping out to its gateway and www.google.com but not 8.8.8.8. I can download files using apt or curl. So it has connectivity.
What should I do or check to reliably have access on the host ?
networking server dns kvm
asked 11 hours ago
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After a seemingly random amount of time I cannot access (ping/ssh/http) a KVM host but can access its guests from anywhere. Restarting the network doesn't fix it. Restarting the machine does. All machines & VMs have static IPs. The network is configured with systemd.network, not netplan, because thats how the hosting provider set it up.
On ubuntu 64 bit 18.04.2 I can set up a bridge with these files in /etc/systemd/network
br0.netdev
[NetDev]
Name=br0
Kind=bridge
br0.network
[Match]
Name=br0
[Network]
Description=network interface on public network, with default route
DHCP=no
Address=x.x.x.x/24
Gateway=x.x.x.x
IPv6AcceptRA=no
NTP=ntp.ovh.net
DNS=127.0.0.1
DNS=x.x.x.x
DNS=x.x.x.x
Gateway=x:x:x:ff:ff:ff:ff:ff
[Address]
Address=x:x:x::/64
[Route]
Destination=x:x:x:ff:ff:ff:ff:ff
Scope=link
uplink.network
[Match]
Name=eno1
[Network]
Bridge=br0
From the host I can ping out to its gateway and www.google.com but not 8.8.8.8. I can download files using apt or curl. So it has connectivity.
What should I do or check to reliably have access on the host ?
networking server dns kvm
asked 11 hours ago
padpad
11
New contributor
pad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
After a seemingly random amount of time I cannot access (ping/ssh/http) a KVM host but can access its guests from anywhere. Restarting the network doesn't fix it. Restarting the machine does. All machines & VMs have static IPs. The network is configured with systemd.network, not netplan, because thats how the hosting provider set it up.
On ubuntu 64 bit 18.04.2 I can set up a bridge with these files in /etc/systemd/network
br0.netdev
[NetDev]
Name=br0
Kind=bridge
br0.network
[Match]
Name=br0
[Network]
Description=network interface on public network, with default route
DHCP=no
Address=x.x.x.x/24
Gateway=x.x.x.x
IPv6AcceptRA=no
NTP=ntp.ovh.net
DNS=127.0.0.1
DNS=x.x.x.x
DNS=x.x.x.x
Gateway=x:x:x:ff:ff:ff:ff:ff
[Address]
Address=x:x:x::/64
[Route]
Destination=x:x:x:ff:ff:ff:ff:ff
Scope=link
uplink.network
[Match]
Name=eno1
[Network]
Bridge=br0
From the host I can ping out to its gateway and www.google.com but not 8.8.8.8. I can download files using apt or curl. So it has connectivity.
What should I do or check to reliably have access on the host ?
networking server dns kvm
asked 11 hours ago
padpad
11
New contributor
pad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
After a seemingly random amount of time I cannot access (ping/ssh/http) a KVM host but can access its guests from anywhere. Restarting the network doesn't fix it. Restarting the machine does. All machines & VMs have static IPs. The network is configured with systemd.network, not netplan, because thats how the hosting provider set it up.
On ubuntu 64 bit 18.04.2 I can set up a bridge with these files in /etc/systemd/network
br0.netdev
[NetDev]
Name=br0
Kind=bridge
br0.network
[Match]
Name=br0
[Network]
Description=network interface on public network, with default route
DHCP=no
Address=x.x.x.x/24
Gateway=x.x.x.x
IPv6AcceptRA=no
NTP=ntp.ovh.net
DNS=127.0.0.1
DNS=x.x.x.x
DNS=x.x.x.x
Gateway=x:x:x:ff:ff:ff:ff:ff
[Address]
Address=x:x:x::/64
[Route]
Destination=x:x:x:ff:ff:ff:ff:ff
Scope=link
uplink.network
[Match]
Name=eno1
[Network]
Bridge=br0
From the host I can ping out to its gateway and www.google.com but not 8.8.8.8. I can download files using apt or curl. So it has connectivity.
What should I do or check to reliably have access on the host ?
networking server dns kvm
networking server dns kvm
asked 11 hours ago
padpad
11
New contributor
pad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 11 hours ago
padpad
11
New contributor
pad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 7 hours ago
pad
asked 11 hours ago
padpad
11
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pad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 11 hours ago
padpad
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asked 11 hours ago
padpad
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