Adtran L768 Manual Do Utilizador
Chapter 1: Understanding HDSL and the Express L768/L1.5
8
Express L768/L1.5 User Manual
61202192L1-1
2.
IP Router:
The Express L768/L1.5 can function as an IP router using the
Routing Information Protocol (RIP) for advertising and learning routes
among other routers. Static routes may also be entered into the routing ta-
ble.
among other routers. Static routes may also be entered into the routing ta-
ble.
3.
IPX Router:
IPX routers and services can be exchanged between the Ex-
press L768/L1.5 and other devices using RIP and Service Advertising Pro-
tocol (SAP). Watch dog serialization filtering and spoofing can permit the
ISDN to be idle during no application traffic periods.
tocol (SAP). Watch dog serialization filtering and spoofing can permit the
ISDN to be idle during no application traffic periods.
4.
Network Address Translation (NAT):
Single networks can connect to the
Internet with this function. The Express L768/L1.5 translates outgoing IP
packets over the HDSL to the IP router at the Internet Service Provider.
Many popular Internet applications are supported.
packets over the HDSL to the IP router at the Internet Service Provider.
Many popular Internet applications are supported.
5.
PPP or Frame Relay:
The layer two protocol used to transfer packets can
be PPP or Frame Relay (RFC 1490). PPP allows a point-to-point connec-
tion, whereas Frame Relay can provide up to ten permanent virtual cir-
cuits.
tion, whereas Frame Relay can provide up to ten permanent virtual cir-
cuits.
Routing and Bridging with the Express L768/L1.5
The Express L768/L1.5 is a Router and Transparent Learning Bridge. Its fea-
tures can be easily configured and used once several basic concepts are under-
stood.
tures can be easily configured and used once several basic concepts are under-
stood.
Factory Default
The Express L768/L1.5 comes from the factory configured for MAC Bridging,
IP routing and IPX routing with no filters or connection information defined.
An IP address of 10.0.0.1 with a network mask of 255.255.255.0 is preloaded.
The factory default layer two configuration is PPP, which provides the least
amount of reconfiguration due to its negotiation-oriented nature.
IP routing and IPX routing with no filters or connection information defined.
An IP address of 10.0.0.1 with a network mask of 255.255.255.0 is preloaded.
The factory default layer two configuration is PPP, which provides the least
amount of reconfiguration due to its negotiation-oriented nature.
Bridging
In Bridge Mode, the Express L768/L1.5 can be used to connect two LAN seg-
ments. In this mode, all protocols are supported because they are transported
across the HDSL link at the MAC layer. The Spanning Tree Algorithm can be
used to guarantee a loop-free topology. MAC addresses are “learned” by each
Express L768/L1.5 to prevent non-WAN packets from being bridged.
ments. In this mode, all protocols are supported because they are transported
across the HDSL link at the MAC layer. The Spanning Tree Algorithm can be
used to guarantee a loop-free topology. MAC addresses are “learned” by each
Express L768/L1.5 to prevent non-WAN packets from being bridged.