Prerequisites for Ethernet Management Ports
When connecting a PC to the Ethernet management port, you must first assign an IP address.
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When connecting a PC to the Ethernet management port, you must first assign an IP address.
The Ethernet management port, also referred to as the Gi0/0 or GigabitEthernet0/0 port, is a VRF (VPN routing/forwarding) interface to which you can connect a PC. You can use the Ethernet management port instead of the device console port for network management. When managing a device stack, connect the PC to the Ethernet management port on a stack member.
In a stack with only stack devices, all the Ethernet management ports on the stack members are connected to a hub to which the PC is connected. The active link is from the Ethernet management port on the active switchthrough the hub, to the PC. If the activedevice fails and a new active device is elected, the active link is now from the Ethernet management port on the new active device to the PC.
1 | Switch stack | 3 | Hub |
2 | Management port | 4 | PC |
By default, the Ethernet management port is enabled. The device cannot route packets from the Ethernet management port to a network port, and the reverse. Even though the Ethernet management port does not support routing, you may need to enable routing protocols on the port.
In the above figure , if the Ethernet management port and the network ports are associated with the same routing process, the routes are propagated as follows:
The routes from the Ethernet management port are propagated through the network ports to the network.
The routes from the network ports are propagated through the Ethernet management port to the network.
Because routing is not supported between the Ethernet management port and the network ports, traffic between these ports cannot be sent or received. If this happens, data packet loops occur between the ports, which disrupt the device and network operation. To prevent the loops, configure route filters to avoid routes between the Ethernet management port and the network ports.
The Ethernet management port supports these features:
Express Setup (only in switch stacks)
Network Assistant
Telnet with passwords
TFTP
Secure Shell (SSH)
DHCP-based autoconfiguration
SMNP (only the ENTITY-MIB and the IF-MIB)
IP ping
Speed—10 Mb/s, 100 Mb/s, and autonegotiation
Duplex mode—Full, half, and autonegotiation
Loopback detection
Cisco Discovery Protocol (CDP)
DHCP relay agent
IPv4 and IPv6 access control lists (ACLs)
Routing protocols
![]() Caution |
Before enabling a feature on the Ethernet management port, make sure that the feature is supported. If you try to configure an unsupported feature on the Ethernet Management port, the feature might not work properly, and the device might fail. |
Command or Action | Purpose | |
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Step 1 |
configure terminal Example:
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Enters global configuration mode. |
Step 2 |
interface gigabitethernet0/0 Example:
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Specifies the Ethernet management port in the CLI. |
Step 3 |
shutdown Example:
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Disables the Ethernet management port. |
Step 4 |
no shutdown Example:
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Enables the Ethernet management port. |
Step 5 |
exit Example:
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Exits interface configuration mode. |
Step 6 |
show interfaces gigabitethernet0/0 Example:
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Displays the link status. To find out the link status to the PC, you can monitor the LED for the Ethernet management port. The LED is green (on) when the link is active, and the LED is off when the link is down. The LED is amber when there is a POST failure. |
Proceed to manage or configure your switch using the Ethernet management port. Refer to the Network Management Configuration Guide (Catalyst 3650 Switches).
Related Topic | Document Title |
---|---|
Bootloader configuration |
System Management Configuration Guide (Catalyst 3650 Switches) |
Bootloader commands |
System Management Command Reference (Catalyst 3650 Switches) |
MIB | MIBs Link |
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All the supported MIBs for this release. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
Description | Link |
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Release |
Modification |
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Cisco IOS XE 3.3SECisco IOS XE 3.3SE |
This feature was introduced. |