Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 289
Con Layer 3 (Network) Mode, Error Message When Trying to Add an IP Address to Layer 2 Interface
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For information on enabling and configuring Spanning Tree Protocol, see Chapter 10, Layer 2, on page 47. To view the interfaces in Layer 2 mode, use the command show interfaces switchport in the EXEC mode. Configure Layer 3 (Network) Mode When you assign an IP address to a physical interface, you place it in Layer 3 mode. Use the ip address command and no shutdown command in INTERFACE mode to enable Layer 3 mode on an individual interface. In all interface types except VLANs, the shutdown command prevents all traffic from passing through the interface. In VLANs, the shutdown command prevents Layer 3 traffic from passing through the interface. Layer 2 traffic is unaffected by the shutdown command. One of the interfaces in the system must be in Layer 3 mode before you configure or enter a Layer 3 protocol mode (for example, OSPF). Figure 15-5 shows how the show config command displays an example of a Layer 3 interface. Figure 15-5. show config Command Example of a Layer 3 Interface Force10(conf-if-gi-1/5)#show config ! interface GigabitEthernet 1/5 ip address 10.10.10.1 /24 no shutdown Force10(conf-if)# If an interface is in the incorrect layer mode for a given command, an error message is displayed to the user. For example, in Figure 15-6, the command ip address triggered an error message because the interface is in Layer 2 mode and the ip address command is a Layer 3 command only. Figure 15-6. Error Message When Trying to Add an IP Address to Layer 2 Interface Force10(conf-if)#show config ! interface GigabitEthernet 1/2 no ip address switchport no shutdown Force10(conf-if)#ip address 10.10.1.1 /24 % Error: Port is in Layer 2 mode Gi 1/2. Force10(conf-if)# Error message To determine the configuration of an interface, you can use the show config command in INTERFACE mode or the various show interface commands in EXEC mode. To assign an IP address, use both of the following commands in the INTERFACE mode: Command Syntax no shutdown Command Mode INTERFACE Purpose Enable the interface. Interfaces | 289
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