User`s guide
Table Of Contents
- Ascend Customer Service
- How to use this guide
- What you should know
- Documentation conventions
- How to use the on-board software
- Manual set
- Configuring WAN Connections
- Configuring IP Routing
- Introduction to IP routing on the Pipeline
- Managing the routing table
- Parameters that affect the routing table
- Static and dynamic routes
- Configuring static routes
- Specifying default routes on a per-user basis
- Enabling the Pipeline to use dynamic routing
- Route preferences
- Viewing the routing table
- Fields in the routing table
- Removing down routes to a host
- Identifying Temporary routes in the routing table
- Configuring IP routing connections
- Ascend Tunnel Management Protocol (ATMP)
- IP Address Management
- Connecting to a local IP network
- BOOTP Relay
- DHCP services
- Dial-in user DNS server assignments
- Local DNS host address table
- Network Address Translation (NAT) for a LAN
- Configuring IPX Routing
- How the Pipeline performs IPX routing
- Adding the Pipeline to the local IPX network
- Working with the RIP and SAP tables
- Configuring IPX routing connections
- Configuring the Pipeline as a Bridge
- Defining Filters and Firewalls
- Setting Up Pipeline Security
- Pipeline System Administration
- Pipeline 75 Voice Features
- IDSL Implementations
- APP Server utility
- About the APP Server utility
- APP Server installation and setup
- Configuring the Pipeline to use the APP server
- Using App Server with Axent SecureNet
- Creating banner text for the password prompt
- Installing and using the UNIX APP Server
- Installing and using the APP Server utility for DO...
- Installing and using the APP Server utility for Wi...
- Installing APP Server on a Macintosh
- Troubleshooting
- Upgrading system software
- What you need to upgrade system software
- Displaying the software load name
- The upgrade procedure
- Untitled

Pipeline User’s Guide Preliminary January 30, 1998 5-1
5
Configuring the Pipeline as a Bridge
This chapter contains the following sections:
Introduction to Ascend bridging
In the Pipeline, bridges are used primarily to provide connectivity for protocols
other than IP and IPX (AppleTalk, for example). They can also be used to join
segments of an IP or IPX network. Because a bridging connection forwards
packets at the hardware address level (link layer), it does not distinguish between
protocol types and it requires no protocol-specific network configuration.
Bridging is very easy to configure and is commonly used to:
• Provide non-routed protocol connectivity with another site
• Link two sites so that their nodes appear to be on the same LAN
• Support protocols that depend on broadcasts to function, such as BOOTP
Be aware that bridges examine all packets on the LAN (called “promiscuous
mode”), so they incur greater processor and memory overhead than routers. On
heavily loaded networks, this increased overhead can result in slower
performance.
Introduction to Ascend bridging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Enabling bridging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Managing the bridge table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Configuring bridged connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9