No internet on VM

[nodesynth]

My VM is not getting internet connectivity. I'm eager to blame the following messages:

Dec 16 11:44:38 proxmox kernel: device tap101i0d0 entered promiscuous mode
Dec 16 11:44:38 proxmox kernel: vmbr0: port 2(tap101i0d0) entering forwarding state

Lately, I'm seeing a lot of such messages which very likely correspond to the network problem with my VM

proxmox:~# cat /var/log/messages | grep -e vmbr0 -e tap
Dec 13 15:34:49 proxmox kernel: device tap101i0d0 entered promiscuous mode
Dec 13 15:34:49 proxmox kernel: vmbr0: port 2(tap101i0d0) entering forwarding state
Dec 15 11:36:36 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 15 11:36:36 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 15 11:37:43 proxmox kernel: device tap101i0d0 entered promiscuous mode
Dec 15 11:37:43 proxmox kernel: vmbr0: port 2(tap101i0d0) entering forwarding state
Dec 16 10:32:16 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 16 10:32:16 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 16 10:35:14 proxmox kernel: device tap101i0d0 entered promiscuous mode
Dec 16 10:35:14 proxmox kernel: vmbr0: port 2(tap101i0d0) entering forwarding state
Dec 16 11:09:11 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 16 11:09:11 proxmox kernel: vmbr0: port 2(tap101i0d0) entering disabled state
Dec 16 11:23:32 proxmox kernel: vmbr0: port 1(eth0) entering forwarding state
Dec 16 11:44:38 proxmox kernel: device tap101i0d0 entered promiscuous mode
Dec 16 11:44:38 proxmox kernel: vmbr0: port 2(tap101i0d0) entering forwarding state

What is the tap101i0d0 device? I know vmbr0 is a software implementation of a switch. Why is vmbr0 at times going into disabled state. What does this mean? Any help is highly appreciated. Thanks guys.