ZyXEL XGS-4728F User Guide - Page 466
Table 172
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Chapter 56 Product Specifications Table 172 Firmware Specifications FEATURE DESCRIPTION Multicast VLAN Registration (MVR) Multicast VLAN Registration (MVR) is designed for applications (such as Media-on-Demand (MoD)) using multicast traffic across a network. MVR allows one single multicast VLAN to be shared among different subscriber VLANs on the network. IP Multicast RIP OSPF DVMRP VRRP STP (Spanning Tree Protocol) / RSTP (Rapid STP)/MSTP (Multiple Spanning Tree Protocol) Loop Guard IP Source Guard Link Aggregation Port Authentication and Security Authentication, Authorization and Accounting This improves bandwidth utilization by reducing multicast traffic in the subscriber VLANs and simplifies multicast group management. With IP multicast, the Switch delivers IP packets to a group of hosts on the network - not everybody. In addition, the Switch can send packets to Ethernet devices that are not VLAN-aware by untagging (removing the VLAN tags) IP multicast packets. RIP (Routing Information Protocol) allows a routing device to exchange routing information with other routers. OSPF (Open Shortest Path First) is a link-state protocol designed to distribute routing information within an autonomous system (AS). An autonomous system is a collection of networks using a common routing protocol to exchange routing information. OSPF is best suited for large networks. DVMRP (Distance Vector Multicast Routing Protocol) is a protocol used for routing multicast data within an autonomous system (AS). DVMRP provides multicast forwarding capability to a layer 3 switch that runs both the IPv4 protocol (with IP Multicast support) and the IGMP protocol. Virtual Router Redundancy Protocol (VRRP), defined in RFC 2338, allows you to create redundant backup gateways to ensure that the default gateway of a host is always available. (M)(R)STP detects and breaks network loops and provides backup links between switches, bridges or routers. It allows a Switch to interact with other (M)(R)STP-compliant switches in your network to ensure that only one path exists between any two stations on the network. Use the loop guard feature to protect against network loops on the edge of your network. Use IP source guard to filter unauthorized DHCP and ARP packets in your network. Link aggregation (trunking) is the grouping of physical ports into one logical higher-capacity link. You may want to trunk ports if for example, it is cheaper to use multiple lower-speed links than to under-utilize a high-speed, but more costly, single-port link. For security, the Switch allows authentication using IEEE 802.1x with an external RADIUS server and port security that allows only packets with dynamically learned MAC addresses and/or configured static MAC addresses to pass through a port on the Switch. The Switch supports authentication, authorization and accounting services via RADIUS and TACACS+ AAA servers. 466 XGS-4526/4528F/4728F User's Guide