The fundamental question revolves around whether a single network interface card (NIC) can simultaneously participate in multiple VLANs by hosting IP addresses from different subnets. This becomes particularly relevant in scenarios where physical port density is limited or cable management is a concern.

Yes, this configuration is absolutely possible through several approaches:

# Linux example (Debian/Ubuntu)
auto eth0
iface eth0 inet static
    address 192.168.1.1
    netmask 255.255.255.0
    up ip addr add 10.0.0.1/24 dev eth0

# Windows equivalent (PowerShell):
New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 192.168.1.1 -PrefixLength 24
New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 10.0.0.1 -PrefixLength 24

The switch port connecting to your server must be configured as a trunk port that allows both VLANs:

# Cisco IOS example
interface GigabitEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 100,200

When implementing this setup for your DRAC management network:

• Ensure proper VLAN tagging is supported by your NIC driver
• Consider using 802.1Q VLAN interfaces for cleaner separation
• Test routing behavior between the subnets

For more complex scenarios, you might consider:

# Creating VLAN subinterfaces in Linux
ip link add link eth0 name eth0.100 type vlan id 100
ip addr add 192.168.1.1/24 dev eth0.100
ip link add link eth0 name eth0.200 type vlan id 200
ip addr add 10.0.0.1/24 dev eth0.200

Common issues to watch for:

1. Verify VLAN tagging is enabled on both ends
2. Check for IP conflicts in both subnets
3. Confirm switch port configuration matches your VLAN requirements

In modern network architectures, the need to segment traffic while minimizing physical infrastructure is common. The scenario involves:

• A server with one physical network interface card (NIC)
• Two distinct VLANs (192.168.1.0/24 and 10.0.0.0/24)
• Requirement for the server to communicate on both networks without additional hardware

The solution lies in VLAN trunking using 802.1Q tagging. Here's how it works:

# On Linux using iproute2:
sudo ip link add link eth0 name eth0.100 type vlan id 100
sudo ip addr add 192.168.1.1/24 dev eth0.100
sudo ip link set dev eth0.100 up

sudo ip link add link eth0 name eth0.200 type vlan id 200
sudo ip addr add 10.0.0.1/24 dev eth0.200
sudo ip link set dev eth0.200 up

The connected switch port must be configured as a trunk port:

# Cisco IOS example
interface GigabitEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 100,200
!

Windows Server administrators can achieve this through:

:: PowerShell commands
New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 192.168.1.1 -PrefixLength 24
New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 10.0.0.1 -PrefixLength 24

Key factors to remember:

• MTU size may need adjustment (typically 1504 bytes for tagged frames)
• Firewall rules must be configured for each VLAN interface
• Performance impact is minimal (1-2% CPU overhead per VLAN)

For Dell DRAC devices as mentioned:

# Example routing table
192.168.1.0/24 dev eth0.100 proto kernel scope link src 192.168.1.1
10.0.0.0/24 dev eth0.200 proto kernel scope link src 10.0.0.1

Common issues and solutions:

# Verify VLAN tagging
tcpdump -i eth0 -nn -e vlan

# Check interface status
ip -d link show