Watson-SHDSL-Router-Manual.doc
Version 1.1-07
Watson SHDSL Router
Operating Manual
Revision: 2012-02-15
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2-3
2.4 Architecture
2.4.1 Block Diagram
Watson SHDSL router integrates an Ethernet Switch, an IP router and a SHDSL
modem which transport and process Ethernet/IP packets between the Ethernet
user interfaces and the DSL wire pairs:
D
S
L
W
ire
p
ai
rs
E
th
er
ne
t U
se
r
In
te
rf
ac
es
Packet
Processor
SHDSL
modem
Ethernet
Switch
DSL1
DSL2
DSL3
DSL4
Trunk
WAN
LAN
Port1
Port2
Port3
Port4
Port5
Port6
Port7
Port8
ETH1
ETH2
ETH3
ETH4
ETH5
ETH6
ETH7
ETH8
Port1
Port2
Port3
Port4
Figure 2-3: Watson SHDSL router block diagram
2.4.2 Ethernet Switch
Watson SHDSL router features an eight port Ethernet switch. Eight LAN ports
(ETH1 .. ETH8) are available at the back of Watson SHDSL router. The switch
trunk port (Trunk) is connected internally to the packet processor LAN port
(LAN). The Ethernet switch features a 2 Gbps non-blocking core which guaran-
tees wire-speed performances.
2.4.3 IP Router
The IP router features bridging, routing, security, VPN and many other functions.
Bridging bases the forwarding decision on the MAC (Media Access Control) ad-
dress, while routing does it on the network layer (IP) address. Bridging allows
transporting packets of network layer protocols that it does not route. In bridge
mode all non-local packets are bridged to the WAN.
The IP router includes comprehensive and robust security services: Statefull
Packet Inspection Firewall, user authentication protocols and password protec-
tion mechanisms. These features together allow users to connect their comput-
ers to the Internet and simultaneously to be protected from the security threats of
the Internet.
IPSEC VPN capability allows to establish a Virtual Private Network (VPN) to con-
nect with business partners and branch offices using data encryption through the
Internet. It provides secure communications without the expense of leased lines.
Watson SHDSL router VPN implementation is based on the IPSec standard and
is fully interoperable with other IPSec-based VPN products.
