User manual D-LINK DGS-3308TG

[. . . ] DGS-3308 Series 8-Port Gigabit Layer 3 Switch User's Guide First Edition (December 2001) 651FG3308015 Printed In Taiwan RECYCLABLE Wichtige Sicherheitshinweise 1. Bitte lesen Sie sich diese Hinweise sorgfältig durch. Heben Sie diese Anleitung für den spätern Gebrauch auf. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. [. . . ] The Switch P must be configured to use IP interfaces before it is capable of IP routing. (See the section titled Setting up IP Interfaces below. ) The Switch can operate in one of two modes: 1. Layer 2 Only with IEEE 802. 1Q VLAN support: the switching process is based upon the source and destination MAC addresses only. 802. 1Q VLANs are supported and the Switch is considered as a VLAN-tag aware device. IP Routing with IEEE 802. 1Q VLAN support: the switching process is based upon the IP source and destination addresses, if present. If the IP addresses are not present, the switching process is based upon the MAC addresses (as in Layer 2 above). 802. 1Q VLANs are supported and the Switch is considered as a VLAN-tag aware device. 2. The Switch must be rebooted when changing the operation mode before the new operation mode can take effect. Changing the Switch Operation Mode To change the Switch's operating mode: Highlight Switch Settings on the Main Menu and press Enter. Figure 6-18. Switch Settings screen 72 8-port Gigabit Ethernet Switch User's Guide Highlight Switch Operation Mode on the Switch Settings menu and press Enter. Figure 6-19. Switch Mode Selection screen The field Select switch operation mode:< > can be toggled using the space bar to one of the two switch operation modes: Layer 2 Only, Support IEEE 802. 1Q VLANs and IP Routing, Support IEEE 802. 1Q VLANs. To make a change in the operation mode of the Switch effective, highlight APPLY and press Enter. Figure 6-20. Change Mode Confirmation screen 73 8-port Gigabit Ethernet Switch User's Guide Type y and press Enter. The Switch will then save the changes made during the current session and reboot. The Switch must be rebooted to change the operation mode. Switch Settings ­ IP Routing Mode Once the Switch is configured for IP Routing (Layer 3 Switching), and rebooted, the Main Menu adds some functions compared to the Layer 2 Only mode. Figure 6-21. Main Menu ­ Layer 3 IP Routing Mode 74 8-port Gigabit Ethernet Switch User's Guide Figure 6-22. Main Menu ­ Layer 2 Switching Mode Layer 2 Switch Settings Note: Layer 2 Switch functions and settings are also available when the Switch is configured to operate in the IP Routing (Layer 3) mode. To access the Layer 2 Switch Settings menu, highlight Layer 2 Switch Settings on the Switch Settings menu and press Enter: 75 8-port Gigabit Ethernet Switch User's Guide Figure 6-23. Layer 2 Switch Settings screen The following fields can then be set: · · Switch GVRP: <Disabled> ­ Group VLAN Registration Protocol is a protocol that allows members to dynamically join VLANs. Switch GMRP: Disabled ­ Group Multicast Registration Protocol is a protocol that allows members to dynamically join Multicast groups. This function is not supported in the current version of the Switch software. Broadcast/Multicast Storm Control: · Upper Threshold: [ 255]Kpps ­ This is the number of thousands Broadcast/Multicast packets per second received by the Switch ­ on one of the base ports ­ that will trigger the Switch's reaction to a Broadcast/Multicast storm. Broadcast Storm Mode:<Disabled> ­ This field can be toggled between Enabled and Disabled using the space bar. This enables or disables, globally, the Switch's reaction to Broadcast storms, triggered at the threshold set above. Multicast Storm Mode:<Disabled> ­ This field can be toggled between Enabled and Disabled using the space bar. [. . . ] This gives only a single blocked port per VLAN and allows the removal of all redundant links by removing switch A or B from the network. The IP routing operational mode of the DGS-3308FG/DGS-3308TG Layer 3 switch can accomplish the following: · · Building a forwarding table, and exchanging information with its peers using routing protocols. Receiving packets and forwarding them to the correct interface based upon their destination address With layer 3 switching, there is no performance penalty to introducing a routing hop and creating an additional segment of the network. 221 8-port Gigabit Ethernet Switch User's Guide Using layer 3 switches and IP routing eliminates the need for STP port blocking because the packets are routed by destination addresses. The link redundancy remains, and relying on the routing protocols gives a faster convergence than with STP. [. . . ]