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030-300500 Rev. A 98 October 2006
User Guide
VersaLink™ Gateway (Model 327W)
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.