local and external network

aplelois · 02-23-2024, 12:43 AM

Hi,
I have colocation at a datacenter and I have two servers one would be for database and other one to host http server.
I have local ethernet connected to switch so that servers can use ips like 192.168.1.101 to connect to mysql.
I am having a little bit of an issue with servers not being able to ping each other with local ip..
What is it that I am missing here?

Code:

[(01:33 AM)][(root@atf)] [(~)] $ ip route
default via 208.117.37.129 dev eno1np0 proto static metric 100
default via 192.168.1.1 dev eno2np1 proto static metric 101
192.168.1.0/24 dev eno2np1 proto kernel scope link src 192.168.1.103 metric 101
208.117.37.129 dev eno1np0 proto static scope link metric 100 

[(01:33 AM)][(root@site)] [(~)] $ ifconfig
eno1np0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 208.117.37.10  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 fe80::3eec:efff:fec8:4b00  prefixlen 64  scopeid 0x20<link>
        ether 3c:ec:ef:c8:4b:00  txqueuelen 1000  (Ethernet)
        RX packets 15482764  bytes 20552671448 (19.1 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15477718  bytes 13958702853 (13.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eno2np1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.103  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::3eec:efff:fec8:4b01  prefixlen 64  scopeid 0x20<link>
        ether 3c:ec:ef:c8:4b:01  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 8634  dropped 0  overruns 0  frame 1930039
        TX packets 59271  bytes 9698668 (9.2 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Ser Olmy · 02-23-2024, 07:58 PM

For one thing, you have two default gateways on the first host. That makes no sense in most scenarios, including the one you describe. It shouldn't cause issues within a local network, though.

Other than that there's not much I can say, as you've provided essentially no information about how these servers are connected or configured, other than posting the output from ip route on one host and ifconfig on another.

Please provide the IP addresses and netmasks of the webservers as well as the MySQL database server, and tell us how they are connected.

___ · 02-24-2024, 02:06 AM

Quote:

RX packets 0 bytes 0 (0.0 B)
RX errors 8634 dropped 0 overruns 0 frame 1930039

looks like a cable/hardware problem.

elgrandeperro · 02-26-2024, 12:13 AM

Managed switch? Same Vlan, you should be able to see the Arp table and a mac forwarding table for those ports. If you don't have access to the switch or if it is a dumb switch:

On the systems, you can query the pinger with "arp -a" to see if you can see the mac address of the other side. If you see it, then you are being blocked most likely by a client firewall. If you don't see a arp entry, you have a connectivity problem, most likely.