User manual D-LINK DGS-3224SR

[. . . ] D-Link TM DGS-3224SR High-Density Stackable Gigabit Ethernet Switch User's Guide D-Link DGS-3212SR Stackable Gigabit Ethernet Switch ____________________ Information in this document is subject to change without notice. Reproduction in any manner whatsoever without the written permission of D-Link Corporation is strictly forbidden. Trademarks used in this text: D-Link, the D-LINK logo are trademarks of D-Link Computer Corporation; Microsoft and Windows are registered trademarks of Microsoft Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. [. . . ] This is the maximum amount of time in seconds allowed for a host to continue membership in a multicast group without the Switch receiving a host membership report. This is the maximum amount of time in seconds a route is kept in the forwarding table without receiving a membership report. This specifies the maximum amount of time in seconds between the Switch receiving a leave group message from a host, and the Switch issuing a group membership query. If no response to the membership query is received before the Leave Timer expires, the (multicast) forwarding entry for that host is deleted. Choose Querier to enable transmitting IGMP Query packets or NonQuerier to disable. This is Disabled by default. Max Response Time Robustness Variable Last Member Query Interval Host Timeout Route Timeout Leave Timer Querier State State Static Router Ports A static router port is a port that has a multicast router attached to it. Generally, this router would have a connection to a WAN or to the Internet. Establishing a router port will allow multicast packets coming from the router to be propagated through the network, as well as allowing multicast messages (IGMP) coming from the network to be propagated to the router. A router port has the following behavior: · · · All IGMP Report packets will be forwarded to the router port. Because routers do not send IGMP reports or implement IGMP snooping, a multicast router connected to the router port of the Layer 3 switch would not be able to receive UDP data streams unless the UDP multicast packets were all forwarded to the router port. 50 D-Link DGS-3224SR Layer 2 Gigabit Ethernet Switch A router port will be dynamically configured when IGMP query packets, RIPv2 multicast, DVMRP multicast, PIM-DM multicast packets are detected flowing into a port. Open the IGMP folder and the click on the Static Router Ports Entry link to open the Current Static Router Ports Entries page, as shown below. Figure 9-6. Current Static Router Ports Screen The Current Static Router Ports Entries page (shown above) displays all of the current entries to the Switch's static router port table. This will open the Static Router Ports Settings page, as shown below. Figure 9-7. Static Router Ports Settings Screen The following parameters can be set: Parameter VID (VLAN ID) VLAN Name Unit Member Ports Description This is the VLAN ID that, along with the VLAN name, identifies the VLAN where the multicast router is attached. This is the Unit ID of the switch in a switch stack for which you are creating an entry into the switch's static router port table. There are the ports on the switch that will have a multicast router attached to them. 51 D-Link DGS-3224SR Layer 2 Gigabit Ethernet Switch New IGMP Snooping Feature In the DGS-3224SR, the user may configure a forbidden portlist, whose members are not forced to become router ports. The CLI command will be: Config router_ports_forbidden To disp[lay the forbidden portlist, the CLI command will be: Show router_ports 52 D-Link DGS-3224SR Layer 2 Gigabit Ethernet Switch Section 10 Spanning Tree Protocol Configuration The switch supports 802. 1d Spanning Tree Protocol (STP) and 802. 1w Rapid Spanning Tree Protocol (RSTP). However since 802. 1w RSTP has been recently introduced to D-Link managed Ethernet switches, a brief introduction to the technology is provided below followed by a description of how to set up 802. 1 d STP and 802. 1w RSTP. 802. 1w Rapid Spanning Tree The Switch implements two versions of the Spanning Tree Protocol, the Rapid Spanning Tree Protocol (RSTP) as defined by the IEE 802. 1w specification and a version compatible with the IEEE 802. 1d STP. RSTP can operate with legacy equipment implementing IEEE 802. 1d, however the advantages of using RSTP will be lost. The IEEE 802. 1w Rapid Spanning Tree Protocol (RSTP) evolved from the 802. 1d STP standard. RSTP was developed in order to overcome some limitations of STP that impede the function of some recent switching innovations, in particular, certain Layer 3 function that are increasingly handled by Ethernet switches. This section introduces some new Spanning Tree concepts and illustrates the main differences between the two protocols. Port Transition States An essential difference between the two protocols is in the way ports transition to a forwarding state and the in the way this transition relates to the role of the port (forwarding or not forwarding) in the topology. [. . . ] All Hardware (or part thereof) that is replaced by D-Link, or for which the purchase price is refunded, shall become the property of D-Link upon replacement or refund. 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Except as otherwise agreed by D-Link in writing, the replacement Software is provided only to the original licensee, and is subject to the terms and conditions of the license granted by D-Link for the Software. [. . . ]