User`s guide

USER’S GUIDE
16 SFVRA Connection Manager
INTEROPERABILITY DEVICES
The remote devices that connect to the SFVRA Connection Manager can be classified into five
types:
• MAC Layer Bridges
•IP Host Devices
• IP Router Devices
• IPX Routers
• AppleTalk Routers
MAC layer bridges connect to the Remote Access Switches using the CPP bridge encapsulation line
protocol. These devices send transparently bridged Ethernet frames to the Remote Access Switches.
MAC layer bridges do not process network layer protocols. They forward all packets based on
source and destination MAC addresses.
IP Host devices are single workstations or PCs that connect to the Remote Access Switches at the
IP network layer. These devices use either the RFC1294 based protocol or PPP to communicate with
the Remote Access Switches.
IP router devices are single devices that represent many other IP hosts and routers to the Remote
Access Switches. They must use the CHAP or PAP protocol to identify themselves to the system.
IP routers usually provide IP network address information at connection time (and use PPP to send
user data to the Remote Access Switches).
IPX routers are single devices that perform network layer tasks (addressing, routing and switching)
to move packets from one location on the network to another. IPX routers use the Internetwork
Packet Exchange (IPX) protocol, typical of the NetWare environment.
AppleTalk routers route AppleTalk datagrams based on address information. They support the
following protocols: RTMP, NBP, and ZIP.
REMOTE ISDN DEVICES
The SFVRA Connection Manager provides a centralized concentrator function for remote ISDN
devices. The devices can be separated into the following categories:
• Remote ISDN bridge devices
• PC based terminal adapters
• ISDN enabled workstations
• other ISDN routers
Typical remote ISDN bridges provide one Ethernet port and one Basic Rate ISDN port. The Basic
Rate port is connected to the switched digital network and is used to make connections to the
Remote Access Switch. The Ethernet port is used to connect to a remote LAN. The remote bridge
device sends Ethernet frames from devices on the remote LAN over the switched network.
PC-based terminal adapters connect to a remote personal computer and use the switched digital
network to connect to the system. The terminal adapter sends network protocol specific frames
from the host PC device over the switched network.
Workstation-based terminal adapters connect to a workstation and use the switched digital
network to connect to the system. The terminal adapter sends network protocol specific frames
from the workstation over the switched network.