Product Datasheet

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 dierent routing protocols
all operating within a router
• Configurable when dierent routing protocols use dierent ways of expressing the distance to a destination
or dierent 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 dierent 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 dierent 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 trac 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 dierent 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 eciency 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 eciently 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 (domain-
wide) 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 trac
• 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)
ProSAFE® LAN Access and Aggregation Chassis Switches Data Sheet
M6100 series
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