JetNet Series Industrial L2 / L3 Rackmount / Rail Ethernet Switch

Static Route
When 2 or more Layer 3 routers or switches are
connected together, the IP traffic must be forwarded to
next hop by static configuration or dynamic target IP
address learning.
Static Route: If the IP address of the next hop is
specified, or if it is assigned by Internet Service
Provider, the IP address of the next hop can be statically
configured. In this case the 2 or more Layer 3 routers/
switches direct the traffic according to the settings.
Default Route: The IP address of the default route is
usually assigned by ISP. Configure the unidirectional
static routes to and from a sub network to allow
communication to occur.
Dynamic Route: Through learning the ARP packets,
the layer 3 router/switch can learn the destination IP
addresses and write the related connection among the
routers to the routing tables.
Hop Based Dynamic Routing - RIP
The RIP (Routing Information Protocol) is the most
popular hop based IP Unicast routing protocol. Each
connected IP interface of the router/layer 3 switch
represents one hop. The hop is the metric to the
destination network.
A E0
E0
Router A Routing Table
Destination Interface Metric
B E0 0
C E0 1
Router C Routing Table
B
E0 C
E1
Router B Routing Table
Destination Interface Metric
A E0 0
C E1 0
The RIP counts maximum 16 hops. It is usually
implemented in flat, simple or small volume router/layer
3 switch network architectures. When choosing the
best route, after routed to one hop, the metric adds 1
automatically. The fewest hop volume to the destination
is always the best path no matter what the interface type
or bandwidth is.
Destination
Interface
Metric
B E0 0
A
E0 1
Link State
Link is an interface on a Router/L3 Switch. It indicates
the IP address, subnet mask, type of network, cost of
the link interface and neighbor to the next network.
State means its relationship to its neighboring Router/L3
Switch.
Link State Database is the collection of all these link
states. The database will be used when choosing the
best route, which usually has the lowest forwarding cost.
Link 1
Link 3 Link 2
Link 1
Interface
Network
IP address
Type of Network
Cost of the link
Neighbor
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