Summary:
When connecting a HP Proliant Microserver gen8 running a fresh install of Linux Mint 22.1, using a ethernet cable previously used by a HP laptop with proven internet connectivity, it gets a new IP using DHCP but is unable to ping gateway or access the internet.
Connection information:
IP Address 192.168.150.50
Broadcast Address 192.168.150.255
Subnet mask 255.255.255.0
Default Route 192.168.150.1
Primary DNS 192.168.150.1
IP address is bound in router DHCP server (Mikrotik):
I can ping myself but not gateway:
ping 127.0.0.1 ✅
ping 192.168.150.50 ✅
ping 192.168.150.1 (destination host unreachable)🔴
Command ip -a
eno2: <BROADCAST,MULTICAST,UP,LOWER UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 94:18:82:38:dc:11 brd ff:ff:ff:ff:ff:ff
altname enp3s0f1
inet 192.168.150.50/24 brd 192.168.150.255 scope global dynamic noprefixroute eno2
valid_lft 169893sec preferred_lft 169893sec
inet6 fe80:8ca6:e580:9fb9:3f36/64 scope link noprefixroute
valid_lft forever preferred_lft forever
Command ip r
default via 192.168.150.1 dev eno2 proto dhcp src 192.168.150.50 metric 20100
192.168.150.0/24 dev eno2 proto kernel link src 192.168.150.50 metric 100
Command route -n
| Destination | Gateway | Genmask | Flags | Metric | Ref | Use | Iface |
|---|---|---|---|---|---|---|---|
| 0.0.0.0 | 192.168.150.1 | 0.0.0.0 | UG | 20100 | 0 | 0 | eno2 |
| 192.168.150.0 | 0.0.0.0 | 255.255.255.255 | U | 100 | 0 | 0 | eno2 |
Command arp -a
_gateway (192.168.150.1) at <**incomplete**> on eno2 🔴
Command sudo arping 192.168.150.1
ARPING 192.168.150.1
Timeout
Timeout
...
Command sudo tcpdump -i eno2 arp or icmp
Request who-has _gateway tell <david-Proliant-MicroServer-Gen8>, length 28
Reply _gateway is-at 74:4d:28:a0:7a:a7 (oui Unknown), length 42
So it seems that the server receives information from the DHCP-server, but just ignores it, since arp a shows the route as incomplete! 🔴
I have no more ideas to try to get my server connected.
The server and network is my private network at home. I tried to ping the hp-server from the router(gateway) and that failed as well.
I do not understand how DHCP can work but not not ping. I am a programmer so please excuse me if I missed to include important information.
