103
User Guide
Topology Solutions
Standards-
Based Multi-
Service
Delivery
The R821 services line card supports the delivery of point-to-point E-Line
and multi-point E-LAN services as defined by the Metro Ethernet Forum.
Traffic belonging to each service is classified by, and tunneled over,
predetermined VLANs for segregation and transport across carrier
networks. Controlled at the service line card, VLANs identify and
segregate the specific ISP-access or corporate-access E-Line service,
and determine corresponding prioritization and traffic management
parameters for the associated traffic. Management traffic, either tagged
or untagged, is given higher priority than user data traffic.
Basic Remote
Management as
a NID
The Radiance services line card can be used with any of Metrobility’s
Premise Service Platforms including the Radiance R1000, R400, and
R200. Together, the platform and card create a network interface device
(NID) that serves as a demarcation point at the customer site. The NID is
designed specifically to maintain maximum isolation between the public
and private networks. Carrier class management access control protects
against denial of service on the management channel. DHCP is enabled
on the R821 for obtaining its management (end-station) IP address,
network mask, and default gateway. The R821 responds to SNMP
requests addressed to unicast and subnet broadcast addresses by deliv-
ering information on its health, status, and network connection. Remote
management from the Central Office is provided using the NID’s unique
IP address.
Central Office
1000 Mbps
R200 with R821
Management
Station
RX
LK
2
LK
RX
10/100BASE
1
MAN FD PWR
SPD
LBK
DIS
Customer Premise
Path fault management using secure ping and SNMP
DHCP
Server
RX
TX
