Samsung Mobile WiMAX Outdoor RAS SPI-2331, System Description

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CHAPTER 2. Overview of Outdoor SPI-2331
2-8 © SAMSUNG Electronics Co., Ltd.
IP Routing Function
Since the outdoor SPI-2331 provides several Ethernet interfaces, it stores the routing table
with the information on the Ethernet interface to route IP packets. The routing table of the
outdoor SPI-2331 is configured depending on operator’s setting and the configuration and
the setting of the routing table are similar to the standard setting of the router.
The outdoor SPI-2331 supports the static routing configuration only and not the router
function for the traffic received from the outside. When the outdoor SPI-2331 connects an
auxiliary device, it supports the IP packet routing function for the auxiliary device by using
Network Address Translation(NAT).
Ethernet/VLAN Interface Function
The outdoor SPI-2331 provides the Ethernet interface and supports the static link grouping
function, Virtual Local Area Network(VLAN) function and Ethernet CoS function under
IEEE 802.3ad for the Ethernet interface. At this time, the MAC bridge function defined in
IEEE 802.1D is excluded.
The outdoor SPI-2331 enables several VLAN IDs to be set in one Ethernet interface and
maps the DSCP value of IP header with the CoS value of Ethernet header in Tx packet to
support Ethernet CoS.
2.2.4 Auxiliary Device Interface Function
The outdoor SPI-2331 can support better performance service and convenience by
supporting various auxiliary devices.
The outdoor SPI-2331 provides the Ethernet interface to connect auxiliary devices and
allocates IP addresses by operating as a DHCP server for the auxiliary devices. In addition,
the outdoor SPI-2331 provides the traffic path to transmit/receive the maintenance traffic
between an auxiliary device and the remote auxiliary device monitoring server.
If the auxiliary device uses a private IP address, the outdoor SPI-2331 carries out the NAT
function to change the address into a public IP address(i.e., the IP address of the outdoor
SPI-2331) for the communication with an external monitoring server.
2.2.5 Maintenance Function
The outdoor SPI-2331 interworking with the management system carries out the following
maintenance functions: system initialization and restart, management for system
configuration, management for the operation parameters, failure and status management for
system resources and services, statistics management for system resources and various
performance data, diagnosis management for system resources and services and security
management for system access and operation.
Convenience Installation and Initialization
The outdoor SPI-2331 automatically receives its IP from the DHCP, and it is initialized
using software and configuration information saved in a non-volatile memory of the system
or an external server.