030-300408 Rev. B
110
August 2005
VersaLink™ Gateway (Model 327W)
User Guide
VC 1 Configuration
VPI
This setting allows you to change your VPI (Virtual Path Indicator) value for a
particular VC, which is defined by your Service Provider.
VCI
This setting allows you to change your VCI (Virtual Channel Indicator) value for a
particular VC, which is defined by your Service Provider.
PCR
Factory Default = 100%
Peak Cell Rate (PCR)-The maximum rate at which cells can be transmitted across a
virtual circuit, specified in cells per second and defined by the interval between the
transmission of the last bit of one cell and the first bit of the next.
This value is a percentage of the current data rate.
100 allows this VC to use 100% of the available bandwidth.
80 allows this VC to use 80% of the available bandwidth.
QoS
Quality of Service, which is determined by your Service Provider.
CBR = Constant Bit Rate
UBR = Unspecified Bit Rate
VBR = Variable Bit Rate
Protocol
The Protocol for each VC, which is specified by your Service Provider.
PPPoA = Point to Point Protocol over ATM (Asynchronous Transfer Mode)
PPPoE = Point to Point Protocol over Ethernet
Bridge = Bridge Protocol
Classical IPoA = Internet Protocol over ATM (Asynchronous Transfer Mode). This
is an ATM encapsulation of the IP protocol.
Status The
protocol
status.
VC 1 Bridge Settings
Bridge = A bridge is a layer 2 device that connects two segments of the same LAN that use the
same protocol such as Ethernet. The modem does not have a WAN IP address in this mode. The
client PC will typically get an IP address from a DHCP server in the network or the IP address can
be assigned to the client PC statically.
Routed Bridge = Routed Bridged Encapsulation (RBE) is the process by which a bridged segment
is terminated on a routed interface. Specifically, VersaLink is routing on an IEEE 802.3 or
Ethernet header carried over RFC 1483 bridged ATM. RBE was developed to address the known
RFC1483 bridging issues, including broadcast storms and security. The modem will get a WAN
IP address through DHCP or can be assigned statically. NAT will use the global address assigned
to the modem.
Proxy Bridge = Proxy Bridge is the process in which the modem acts as a proxy ARP agent for a
local public subnet. The modem will be assigned an IP address from within that public subnet.
The modem will direct all traffic to a VersaLink, which is configured statically. VersaLink
address must not reside within VersaLink’s assigned public subnet. All traffic will be sent via
VersaLink’s MAC address. The LAN may also have a private NAT'ed network. NAT will use the
global address assigned to the modem.
Mode
VLAN = Assigns VLAN tags to individual data ports on the modem.
