Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 87
Loopback interfaces, Port-channel interfaces
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After you upgrade OS10 from an earlier version with configured VLANs, if you configure the VLAN scale profile and enable L3 routing on VLANs, save the configuration and reload the switch to apply the scale profile settings. Apply VLAN scale profile OS10(config)# scale-profile vlan OS10(config)# interface vlan 10 OS10(conf-if-vl-10)# mode L3 Loopback interfaces A loopback interface is a virtual interface in which the software emulates an interface. Because a loopback interface is not associated to physical hardware entities, the loopback interface status is not affected by hardware status changes. Packets routed to a loopback interface are processed locally to the OS10 device. Because this interface is not a physical interface, you can configure routing protocols on this interface to provide protocol stability. You can place loopback interfaces in default L3 mode. • Enter the loopback interface number in CONFIGURATION mode (0 to 16383). interface loopback number • Enter the loopback interface number to view the configuration in EXEC mode. show interface loopback number • Enter the loopback interface number to delete a loopback interface in CONFIGURATION mode. no interface loopback number View loopback interface OS10# show interface loopback 4 Loopback 4 is up, line protocol is up Hardware is unknown. Interface index is 102863300 Internet address is 120.120.120.120/24 Mode of IPv4 Address Assignment : MANUAL MTU 1532 bytes Flowcontrol rx false tx false ARP type: ARPA, ARP Timeout: 240 Last clearing of "show interface" counters : 00:00:11 Queuing strategy : fifo Input 0 packets, 0 bytes, 0 multicast Received 0 errors, 0 discarded Output 0 packets, 0 bytes, 0 multicast Output 0 errors, Output 0 invalid protocol Time since last interface status change : 00:00:11 Port-channel interfaces Port-channels are not configured by default. Link aggregation is a method of grouping multiple physical interfaces into a single logical interface - a link aggregation group (LAG) or port -channel. A port-channel aggregates the bandwidth of member links, provides redundancy, and load balances traffic. If a member port fails, the OS10 device redirects traffic to the remaining ports. A physical interface can belong to only one port-channel at a time, and a port-channel must contain interfaces of the same interface type and speed. OS10 supports up to 128 port-channels, with up to 32 ports per channel. To configure a port-channel, use the same configuration commands as for Ethernet port interfaces. Port-channels are transparent to network configurations and managed as a single interface. For example, configure one IP address for the group, and use the IP address for all routed traffic on the port-channel. By configuring port channels, you can create larger capacity interfaces by aggregating a group of lower speed links. For example, you can build a 40G interface by aggregating four 10G Ethernet interfaces together - if one of the four interfaces fails, traffic is redistributed across the three remaining interfaces. Interfaces 87