Dell PowerConnect J-8216 Software Guide for JUNOS version 10.3 - Page 936

Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS Table 117: Network Interface Types and Purposes (continued) Type LAN access interfaces Purpose Use these J-EX Series switch interfaces to connect a personal computer, laptop, file server, or printer to the network. When you power on a J-EX Series switch and use the factory-default configuration, the software automatically configures interfaces in access mode for each of the network ports. The default configuration also enables autonegotiation for both speed and link mode. Power over Ethernet (PoE) interfaces J-EX Series switches provide PoE network ports with various switch models. These ports can be used to connect voice over IP (VoIP) telephones, wireless access points, video cameras, and point-of-sale devices to safely receive power from the same access ports that are used to connect personal computers to the network. PoE interfaces are enabled by default in the factory configuration. Trunk interfaces J-EX Series access switches can be connected to a distribution switch or customer-edge (CE) switches or routers. To use a port for this type of connection, you must explicitly configure the port interface for trunk mode. The interfaces from the distribution switch or CE switch to the access switches must also be configured for trunk mode. Special Interfaces Table 118 on page 864 lists the types of special interfaces supported on J-EX Series switches. Table 118: Special Interface Types and Purposes Type Console port Purpose Each J-EX Series switch has a serial port, labeled CON or CONSOLE, for connecting tty-type terminals to the switch using standard PC-type tty cables. The console port does not have a physical address or IP address associated with it. However, it is an interface in the sense that it provides access to the switch. On J-EX4200 switches that are configured as a Virtual Chassis, you can access the master and configure all members of the Virtual Chassis through any member's console port. For more information on the console port in a Virtual Chassis, see "Understanding Global Management of a Virtual Chassis Configuration" on page 699. Loopback All J-EX Series switches have this software-only virtual interface that is always up. The loopback interface provides a stable and consistent interface and IP address on the switch. Management interface The Junos OS for J-EX Series switches automatically creates the switch's management Ethernet interface, me0. The management Ethernet interface provides an out-of-band method for connecting to the switch. To use me0 as a management port, you must configure its logical port, me0.0, with a valid IP address. You can connect to the management interface over the network using utilities such as SSH or Telnet. SNMP can use the management interface to gather statistics from the switch. (The management interface me0 is analogous to the fxp0 interfaces on routers running the Junos OS.) Routed VLAN Interface (RVI) J-EX Series switches use a Layer 3 routed VLAN interface (RVI) named vlan to route traffic from one broadcast domain to another and to perform other Layer 3 functions such as traffic engineering. These functions are typically performed by a router interface in a traditional network. The RVI functions as a logical router, eliminating the need for having both a switch and a router. The RVI (the vlan interface) must be configured as part of a broadcast domain or virtual private LAN service (VPLS) routing instance for Layer 3 traffic to be routed out of it. 864