zengguan opened a new issue #14820:
URL: https://github.com/apache/pulsar/issues/14820
**Describe the bug**
machine：tencent Cloud Virtual Machine，CVM
os: tencent os tlinux 2.6
i wanna set `loadBalancerOverrideBrokerNicSpeedGbps=9` to limit
bandwidthout, but it does not work because
`org.apache.pulsar.broker.loadbalance.impl.LinuxBrokerHostUsageImpl getNics()`
get two nics，one is physical Nic eth1，another one is virtual Nic veth51f9d919
**To Reproduce**
Steps to reproduce the behavior:
1. set broker parameter `loadBalancerOverrideBrokerNicSpeedGbps=9`
2. check nics path
```
[root@9 ~]# cd /sys/class/net
[root@9 /sys/class/net]# ls -l
total 0
lrwxrwxrwx 1 root root 0 Mar 8 21:01 cbr0 -> ../../devices/virtual/net/cbr0
lrwxrwxrwx 1 root root 0 Mar 8 21:01 dummy0 ->
../../devices/virtual/net/dummy0
lrwxrwxrwx 1 root root 0 Mar 8 20:59 eth1 ->
../../devices/pci0000:00/0000:00:05.0/virtio0/net/eth1
lrwxrwxrwx 1 root root 0 Mar 8 21:01 kube-ipvs0 ->
../../devices/virtual/net/kube-ipvs0
lrwxrwxrwx 1 root root 0 Mar 8 20:59 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 Mar 8 21:03 veth51f9d919 ->
../../devices/virtual/net/veth51f9d919
```
3. Becasue
`org.apache.pulsar.broker.loadbalance.impl.LinuxBrokerHostUsageImpl
isPhysicalNic(Path path)` path is relative path, so veth51f9d919 in
`!path.toString().contains("/virtual/")` is true, Expected false。
4. In this condition,
`org.apache.pulsar.broker.loadbalance.impl.LinuxBrokerHostUsageImpl
getTotalNicLimitKbps()` return 18874368, Expected 9437184。the limit
bandwidthout does not work
**Expected behavior**
virtual nic `veth51f9d919` in `!path.toString().contains("/virtual/")` is
false。
**Desktop (please complete the following information):**
- OS: tencent os tlinux 2.6
**Additional context**
i wanna fix this issue
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