# Overview

#### VPC

A VPC provides a logically isolated network environment for BMSs. You can configure EIPs, security groups, and VPNs in a VPC and use the VPC for communication between ECSs and BMSs.

#### View VPC NICs

You can view the network interfaces of the VPC on the NICs tab page of the BMS details page. For Linux images, you can also locate the VLAN sub-interface or bond interface in the OS based on the allocated IP address.

Take CentOS 7.4 64-bit as an example. Log in to the OS and view the NIC configuration files ifcfg-eth0, ifcfg-eth1, ifcfg-bond0, ifcfg-bond0.3030, ifcfg-bond0.2601, and ifcfg-bond0.2602 in the /etc/sysconfig/network-scripts directory. You need to use IP mapping to match the network.

Run the ifconfig command. The private IP address and MAC address of VPC NIC 1 is 192.168.0.190 and fa:16:3e:02:67:66. The private IP address and MAC address of VPC NIC 2 are 192.168.1.175 and fa:16:3e:16:45:4e. eth0 and eth1 automatically form bond0, and they have the same MAC address. In addition, it can be determined that ifcfg-eth0, ifcfg-eth1, ifcfg-bond0, and ifcfg-bond0.3030 are VPC NIC configuration files.

The following figures show the NIC and bond configuration information.

Parent topic: VPC