Here's my scheme:
VM > Unraid Server > Router > Internet

When I allow DHCP, there are no issues.  When I switch to static, I get full local intranet access but no internet access.  Here are some images showing the DHCP `ifconfig`, `ip a`, `ip route`, and `ip neigh`.

 

DHCP

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: ens2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:94:04:62 brd ff:ff:ff:ff:ff:ff
    altname enp0s2
    inet 192.168.1.198/24 metric 100 brd 192.168.1.255 scope global dynamic ens2
       valid_lft 43110sec preferred_lft 43110sec
    inet6 fe80::5054:ff:fe94:462/64 scope link
       valid_lft forever preferred_lft forever
  
  ens2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.198  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::5054:ff:fe94:462  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:94:04:62  txqueuelen 1000  (Ethernet)
        RX packets 114  bytes 8804 (8.8 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 20  bytes 1988 (1.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 84  bytes 6352 (6.3 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 84  bytes 6352 (6.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  
default via 192.168.1.1 dev ens2 proto dhcp src 192.168.1.198 metric 100
192.168.1.0/24 dev ens2 proto kernel scope link src 192.168.1.198 metric 100
192.168.1.1 dev ens2 proto dhcp scope link src 192.168.1.198 metric 100
  
192.168.1.1 dev ens2 lladdr 6c:99:61:d9:a6:ea STALE

 

STATIC

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: ens2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:94:04:62 brd ff:ff:ff:ff:ff:ff
    altname enp0s2
    inet 192.168.1.137/24 brd 192.168.1.255 scope global ens2
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fe94:462/64 scope link 
       valid_lft forever preferred_lft forever

ens2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.137  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::5054:ff:fe94:462  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:94:04:62  txqueuelen 1000  (Ethernet)
        RX packets 780  bytes 66973 (66.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 966  bytes 67290 (67.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 1350  bytes 104765 (104.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1350  bytes 104765 (104.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 
192.168.1.0/24 dev ens2 proto kernel scope link src 192.168.1.137 

8.8.8.8 dev ens2 FAILED 
192.168.1.136 dev ens2 lladdr 1c:98:ec:0f:c4:30 REACHABLE 
8.8.4.4 dev ens2 INCOMPLETE

 

Here is my configuration (/etc/netplan/50-cloud-init.yaml):
 

network:
  version: 2
  ethernets:
    ens2:
      dhcp4: false
      dhcp6: true
      addresses:
      - 192.168.1.137/24
      routes:
      - to: default
        via: 192.168.1.254
      nameservers:
        addresses: [8.8.8.8,8.8.4.4]

 

What am I missing here?  Everything to me seems to be the same but obviously something is preventing outside access.

 

Here is a ping to the google nameservers:

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.1.137 icmp_seq=1 Destination Host Unreachable
From 192.168.1.137 icmp_seq=2 Destination Host Unreachable
From 192.168.1.137 icmp_seq=3 Destination Host Unreachable
From 192.168.1.137 icmp_seq=4 Destination Host Unreachable

 

Here is a traceroute to the google nameservers:

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max
  1   192.168.1.137  1407.485ms !H  *  68.629ms !H

 

Edited January 27, 20251 yr by addohm

Please post the diagnostics with the static IP set.