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HSIM-W6 Firmware Support
HSIM-W6 Installation Guide 2-7
HDLC
Cabletron Systems has provided the High-level Data Link Control (HDLC) protocol which is used
in conjunction with the Inverse Multiplexing (IMUX) feature and the WPIM-HDSL to conserve a
user’s WAN bandwidth between two Cabletron Systems products, over a point-to-point
connection. Cabletron Systems products such as the HSIM-W6, CSX200, and CSX400 must be in
use on both ends of the WAN link for these functions to work. The HDLC (RAW) protocol reduces
the amount of overhead information that needs to be contained within each data packet to direct it
to its destination. This decreased packet overhead provides the IMUX and HDSL functions with
more bandwidth to transfer user data.
DHCP and NAT
The Dynamic Host Configuration Protocol (DHCP) and Network Address Translation (NAT)
method eliminates the expense of purchasing limited public IP addresses for each client on a local
network, and the need to re-configure a client if it is moved to a different network.
The HSIM-W6 acts as a DHCP server that allows individual clients (PCs, network equipment) to
take turns using a range of private IP addresses (often referred to as local IP addresses), and
provides optional secondary setup features for these clients on a per-port basis. The HSIM-W6
distributes these addresses dynamically, assigning a local IP address to an individual client from a
range of 253 available addresses in its table on a first-come-first-served basis. This local IP address
is then “leased” for an predetermined amount of time, which is configured for the particular port.
The Ethernet port provides DHCP services for one Class C subnet and secondary setup features for
individual clients support the use of a default gateway, domain name and WINs server.
On the Wide Area Network (WAN) side, the Network Address Translation (NAT) routing method
is used to enable clients assigned with local IP addresses to use the public IP address(es) of the
HSIM-W6 WAN interface(s) to access the WAN.
NOTE
A private or “local” network is referred to as a sub network that is using private or
“local” IP addresses. An “outside” network refers to a Wide Area Network (WAN)
commonly known as an Internet where registered public IP addresses are required.
- HSIM-W6 1
- Installation Guide 1
- FCC Notice 3
- Declaration of Conformity 6
- Contents 10
- Introduction 11
- Related Documents 12
- Document Conventions 12
- Getting Help 13
- Chapter 1: 14
- About the HSIM-W6 15
- Chapter 2: 16
- Additional Features 17
- Optional Feature 18
- HSIM-W6 Firmware Support 18
- Inverse Multiplexing 20
- Firmware Data Compression 20
- DHCP and NAT 21
- Frame Relay Protocol 22
- Point-to-Point Protocol 23
- PAP and CHAP Security 23
- Multilink Protocol 24
- ISDN Back-up 26
- The IP-OSPF Routing Protocol 26
- IP-OSPF Hierarchy 27
- Chapter 2: About the HSIM-W6 28
- Bridging and Routing 29
- System Passwords 31
- Installation 37
- Installing Interface Modules 38
- Coverplate 39
- Standoff Screws 39
- HSIM Standoffs 39
- CSX-COMP/ENCR Installation 40
- Installing an HSIM 42
- Chapter 3: Installation 44
- Troubleshooting 47
- Chapter 4: Troubleshooting 48
- Power (PWR) LED is OFF 51
- Processor (CPU) LED is OFF 51
- ASYNC Console Connection 52
- Troubleshooting the WAN 53
- Status (STS) LED is OFF 54
- Status (STS) LED is RED 55
- Status (STS) LED is AMBER 55
- Status (STS) LED is GREEN 56
- If Bridging 57
- If TCP/IP Routing 57
- WPIM Cable Specifications 59
- WPIM-SY interface cables 61
- WPIM-SY 61
- WPIM-DDS 69
- WPIM-DI interface cables 72
- WPIM-HDSL 73
- WPIM-S/T 74
- Regulatory Compliance 75
- Glossary 85
- Appendix E: Glossary 86
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