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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Configuring Management Interfaces

The dedicated Management interface provides management access to the system.

You can configure this interface using the CLI, but the configuration options on this interface are limited. You cannot configure Gateway addresses and IP addresses if it appears in the main routing table of Dell EMC Networking OS. In addition, proxy ARP is not supported on this interface.

To configure a management interface, use the following commands.

  • Enter the slot and the port (1) to configure a Management interface.
    CONFIGURATION mode
    interface managementethernet interface
    The slot range is 1.
    The port range is 1.
  • Configure an IP address and mask on a Management interface.
    INTERFACE mode
    ip address ip-address mask
    • ip-address mask: enter an address in dotted-decimal format (A.B.C.D). The mask must be in /prefix format (/x).

Viewing Two Global IPv6 Addresses

You can configure two global IPv6 addresses on the system in EXEC Privilege mode. To view the addresses, use the show interface managementethernet command, as shown in the following example. If you try to configure a third IPv6 address, an error message displays. If you enable auto-configuration, all IPv6 addresses on that management interface are auto-configured. The first IPv6 address that you configure on the management interface is the primary address. If deleted, you must re-add it; the secondary address is not promoted.

The following rules apply to having two IPv6 addresses on a management interface:
  • IPv6 addresses on a single management interface cannot be in the same subnet.
  • IPv6 secondary addresses on management interfaces:
    • across a platform must be in the same subnet.
    • must not match the virtual IP address and must not be in the same subnet as the virtual IP.
DellEMC#show interfaces managementethernet 1/1
ManagementEthernet 1/1 is up, line protocol is up
Hardware is DellForce10Eth, address is 00:01:e8:a0:bf:f3
    Current address is 00:01:e8:a0:bf:f3
Pluggable media not present
Interface index is 302006472
Internet address is 10.16.130.5/16
Link local IPv6 address: fe80::201:e8ff:fea0:bff3/64
Global IPv6 address: 1::1/
Global IPv6 address: 2::1/64
Virtual-IP is not set
Virtual-IP IPv6 address is not set
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed 1000 Mbit, Mode full duplex
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 00:06:14
Queueing strategy: fifo
    Input 791 packets, 62913 bytes, 775 multicast
    Received 0 errors, 0 discarded
    Output 21 packets, 3300 bytes, 20 multicast
    Output 0 errors, 0 invalid protocol
Time since last interface status change: 00:06:03

If there are two RPMs on the system, configure each Management interface with a different IP address. Unless you configure the management route command, you can only access the Management interface from the local LAN. To access the Management interface from another LAN, configure the management route command to point to the Management interface.

Alternatively, you can use the virtual-ip command to manage a system with one or two RPMs. A virtual IP is an IP address assigned to the system (not to any management interfaces) and is a CONFIGURATION mode command. When a virtual IP address is assigned to the system, the active management interface of the RPM is recognized by the virtual IP address — not by the actual interface IP address assigned to it. During an RPM failover, you do not have to remember the IP address of the new RPM’s management interface — the system still recognizes the virtual-IP address.

  • virtual-ip is a CONFIGURATION mode command.
  • When applied, the management port on the primary RPM assumes the virtual IP address. Executing the show interfaces and show ip interface brief commands on the primary RPM management interface displays the virtual IP address and not the actual IP address assigned on that interface.
  • A duplicate IP address message is printed for the management port’s virtual IP address on an RPM failover. This behavior is a harmless error that is generated due to a brief transitory moment during failover when both RPMs’ management ports own the virtual IP address, but have different MAC addresses.
  • The primary management interface uses only the virtual IP address if it is configured. The system cannot be accessed through the native IP address of the primary RPM’s management interface.
  • After the virtual IP address is removed, the system is accessible through the native IP address of the primary RPM’s management interface.
  • Primary and secondary management interface IP and virtual IP must be in the same subnet.

To view the Primary RPM Management port, use the show interface Managementethernet command in EXEC Privilege mode. If there are two RPMs, you cannot view information on that interface.

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