Netgear APS1000W Product Data Sheet - Page 10

ProSAFE® LAN Access and Aggregation Chassis Switches Data Sheet M6100 series Support of Routing Information Protocol (RIPv2) as a distance vector protocol specified in RFC 2453 for IPv4 • Each route is characterized by the number of gateways, or hops, a packet must traverse to reach its intended destination • Categorized as an interior gateway protocol, RIP operates within the scope of an autonomous system Route Redistribution feature enables the exchange of routing information among different routing protocols all operating within a router • Configurable when different routing protocols use different ways of expressing the distance to a destination or different metrics and formats • For instance, when OSPF redistributes a route from RIP, and needs to know how to set each of the route's path attributes Open Shortest Path First (OSPF) link-state protocol for IPv4 and IPv6 • For IPv4 networks, OSPF version 2 is supported in accordance with RFC 2328, including compatibility mode for the RFC 1583 older specification • For IPv6 networks, OSPF version 3 is fully supported • OSPF can operate within a hierarchy, the largest entity within the hierarchy is the autonomous system (AS) • An AS is a collection of networks under a common administration sharing a common routing strategy (routing domain) • An AS can be divided into a number of areas or groups of contiguous networks and attached hosts • Two different types of OSPF routing occur as a result of area partitioning: Intra-area and Inter-area • Intra-area routing occurs if a source and destination are in the same area • Inter-area routing occurs when a source and destination are in different areas • An OSPF backbone distributes information between areas Advanced OSPF implementation for large routing domains • OSPF NSSA feature supports RFC 3101, The OSPF Not-So-Stubby Area (NSSA) Option • Forwarding of OSPF Opaque LSAs is enabled by default • Passive interface feature can disable sending OSPF routing updates on an interface • Static Area Range Costs feature allows to configure a fixed OSPF cost that is always advertised when an area range is active • OSPF Equal Cost Multipath (ECMP) feature allows to forward traffic through multiple paths, taking advantage of more bandwidth • ECMP routes can be learned dynamically, or configured statically with multiple static routes to same destination but with different next hops • OSPF Max Metric feature allows to to override the metric in summary type 3 and type 4 LSAs while in stub router mode • Automatic Exiting of Stub Router Mode feature allows to exit stub router mode, reoriginating the router LSA with proper metric values on transit links • Static Area Range Costs feature allows to configure a fixed OSPF cost that is always advertised when an area range is active OSPF LSA Pacing feature improves the efficiency of LSA flooding, reducing or eliminating the packet drops caused by bursts in OSPF control packets • LSA transmit pacing limits the rate of LS Update packets that OSPF can send • With LSA refresh groups, OSPF efficiently bundles LSAs into LS Update packets when periodically refreshing self-originated LSAs OSPF Flood Blocking feature allows to disable LSA flooding on an interface with area or AS (domainwide) scope • In that case, OSPF does not advertise any LSAs with area or AS scope in its database description packets sent to neighbors OSPF Transit-Only Network Hiding is supported based on RFC 6860 with transit-only network defined as a network connecting only routers • Transit-only networks are usually configured with routable IP addresses which are advertised in LSAs but are not needed for data traffic • If router-to-router subnets are advertised, remote attacks can be launched against routers by sending packets to these transit-only networks • Hiding transit-only networks speeds up network convergence and reduces vulnerability to remote attacks • 'Hiding' implies that the prefixes are not installed in the routing tables on OSPFv2 and OSPFv3 routers IP Multinetting allows to configure more than one IP address on a network interface (other vendors may call it IP Aliasing or Secondary Addressing) Page 10 of 48