[PVE-User] link down for network interface

Leandro Roggerone leandro at tecnetmza.com.ar
Wed Apr 7 17:25:16 CEST 2021


Hi guys ...
Yesterday was working on my datacenter cabling my new proxmox network
interfaces.
I connected a network port to my mikrotik router.
Before coming home I checked network linked condition and physically was ok
, both leds blinking on both side , router and server nic. (eno1)
Now , working remotely can see that server interface has no link.
Very strange since interface at router is up.
Any idea ? I never seen something similar (one side  link ok  and the other
is down).
Here can I share some outputs:
root at pve2:~# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens2f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0
state UP mode DEFAULT group default qlen 1000
    link/ether a0:d3:c1:f5:37:08 brd ff:ff:ff:ff:ff:ff
3: ens2f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr1
state UP mode DEFAULT group default qlen 1000
    link/ether a0:d3:c1:f5:37:09 brd ff:ff:ff:ff:ff:ff
4: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master vmbr2
state DOWN mode DEFAULT group default qlen 1000
    link/ether 40:a8:f0:2a:18:80 brd ff:ff:ff:ff:ff:ff
5: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master vmbr3
state DOWN mode DEFAULT group default qlen 1000

as you can see eno1 is down ... while can see link up on the other
connected side.
I will change cable tomorrow, but wanted to share this experience with you.
BTW , already tryed autonegociation , and fixed 100, 1000Mb.
Regards.
Leandro.

<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
Libre
de virus. www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>


More information about the pve-user mailing list