We have newly deployed an environment based on Prometheus and node_exporter, and some abnormal situations have been discovered. On the physical machine nodes, there are tap devices with packet loss. When observing the tap devices on the physical machine, it was found that TX has some packet loss. I hope to get some help to solve this problem. Thank you!
ip -s link show tap143i0
14: tap143i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr143i0 state UNKNOWN mode DEFAULT group default qlen 8000
link/ether 5e:a2:d9:87:fc:02 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped missed mcast
20566609867859 18542221755 0 0 0 0
TX: bytes packets errors dropped carrier collsns
24355720707783 19829179600 0 229244231 0 0
time:2025-07-14 02:17:08.868 +0000 UTC,message:Node 10.156.95.21:9100 experiences packet drop > 50 packet/s on interface tap143i0.
pve 8.4.0
root@kvm-pve-010156095021:~# uname -r
6.8.12-9-pve
vm config
boot: order=scsi0;ide2;net0
cores: 16
cpu: host
hostpci0: 0000:51:00
ide2: none,media=cdrom
memory: 131072
meta: creation-qemu=9.2.0,ctime=1749628041
name: lxzj-95-61
net0: virtio=BC:24:11
6:0A:13,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: local:143/vm-143-disk-0.qcow2,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=ca0e51f8-5c82-4f00-87c5-ca28421d8991
sockets: 2
tags: middle
vmgenid: 3911b250-6afe-471f-ad1d-b1715f2ac54e
phy network config
uto lo
iface lo inet loopback
iface ens16f0 inet manual
iface ens16f1 inet manual
iface ens16f2 inet manual
iface ens16f3 inet manual
auto ens1f0
iface ens1f0 inet manual
auto ens1f1
iface ens1f1 inet manual
auto bond0
iface bond0 inet static
bond-slaves ens1f0 ens1f1
bond-miimon 100
bond-mode 802.3ad
bond-xmit-hash-policy layer2+3
auto vmbr0
iface vmbr0 inet static
address 10.156.95.21
gateway 10.156.80.1
netmask 255.255.240.0
bridge-ports bond0
bridge-stp off
bridge-fd 0
ip -s link show tap143i0
14: tap143i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr143i0 state UNKNOWN mode DEFAULT group default qlen 8000
link/ether 5e:a2:d9:87:fc:02 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped missed mcast
20566609867859 18542221755 0 0 0 0
TX: bytes packets errors dropped carrier collsns
24355720707783 19829179600 0 229244231 0 0
time:2025-07-14 02:17:08.868 +0000 UTC,message:Node 10.156.95.21:9100 experiences packet drop > 50 packet/s on interface tap143i0.
pve 8.4.0
root@kvm-pve-010156095021:~# uname -r
6.8.12-9-pve
vm config
boot: order=scsi0;ide2;net0
cores: 16
cpu: host
hostpci0: 0000:51:00
ide2: none,media=cdrom
memory: 131072
meta: creation-qemu=9.2.0,ctime=1749628041
name: lxzj-95-61
net0: virtio=BC:24:11
6:0A:13,bridge=vmbr0,firewall=1numa: 0
ostype: l26
scsi0: local:143/vm-143-disk-0.qcow2,iothread=1,size=100G
scsihw: virtio-scsi-single
smbios1: uuid=ca0e51f8-5c82-4f00-87c5-ca28421d8991
sockets: 2
tags: middle
vmgenid: 3911b250-6afe-471f-ad1d-b1715f2ac54e
phy network config
uto lo
iface lo inet loopback
iface ens16f0 inet manual
iface ens16f1 inet manual
iface ens16f2 inet manual
iface ens16f3 inet manual
auto ens1f0
iface ens1f0 inet manual
auto ens1f1
iface ens1f1 inet manual
auto bond0
iface bond0 inet static
bond-slaves ens1f0 ens1f1
bond-miimon 100
bond-mode 802.3ad
bond-xmit-hash-policy layer2+3
auto vmbr0
iface vmbr0 inet static
address 10.156.95.21
gateway 10.156.80.1
netmask 255.255.240.0
bridge-ports bond0
bridge-stp off
bridge-fd 0