Reference Guide

If an interface is in the incorrect layer mode for a given command, an error message is displayed (shown in bold). In the
following example, the ip address command triggered an error message because the interface is in Layer 2 mode and the ip
address command is a Layer 3 command only.
Dell(conf-if)#show config
!
interface TengigabitEthernet 1/2
no ip address
switchport
no shutdown
Dell(conf-if)#ip address 10.10.1.1 /24
% Error: Port is in Layer 2 mode Te 1/2.
Dell(conf-if)#
To determine the configuration of an interface, use the show config command in INTERFACE mode or the various show
interface commands in EXEC mode.
Configuring Layer 3 (Interface) Mode
To assign an IP address, use the following commands.
● Enable the interface.
INTERFACE mode
no shutdown
● Configure a primary IP address and mask on the interface.
INTERFACE mode
ip address ip-address mask [secondary]
The ip-address must be in dotted-decimal format (A.B.C.D) and the mask must be in slash format (/xx).
Add the keyword secondary if the IP address is the interface’s backup IP address.
You can only configure one primary IP address per interface. You can configure up to 255 secondary IP addresses on a single
interface.
To view all interfaces to see with an IP address assigned, use the show ip interfaces brief command in EXEC mode as
shown in View Basic Interface Information.
To view IP information on an interface in Layer 3 mode, use the show ip interface command in EXEC Privilege mode.
Dell>show ip int vlan 58
Vlan 58 is up, line protocol is up
Internet address is 1.1.49.1/24
Broadcast address is 1.1.49.255
Address determined by config file
MTU is 1554 bytes
Inbound access list is not set
Proxy ARP is enabled
Split Horizon is enabled
Poison Reverse is disabled
ICMP redirects are not sent
ICMP unreachables are not sent
Egress Interface Selection (EIS)
EIS allows you to isolate the management and front-end port domains by preventing switch-initiated traffic routing between the
two domains. This feature provides additional security by preventing flooding attacks on front-end ports.
The following protocols support EIS: DNS, FTP, HTTP, IGMP, NTP, RADIUS, SNMP, SSH, Syslog, TACACS, Telnet, and TFTP.
When you enable this feature, all management routes (connected, static, and default) are copied to the management EIS routing
table. Use the management route command to add new management routes to the default and EIS routing tables. Use the
show ip management-eis-route command to view the EIS routes.
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Interfaces