6
B
RIDGING
C
OMMANDS
Overview
This chapter identifies and describes the Bridging commands accessible from the
OfficeConnect Gateway CLI. A bridge connects two or more physical networks
together to function as one large network. The OfficeConnect Gateway can be
configured to be a learning bridge. A learning bridge does more than just link
networks; it separates network traffic and forwards only the packets that need to
be forwarded.
How Bridges Work
Bridges separate traffic by examining the Media Access Control (MAC) addresses
contained in the data packets. MAC addresses uniquely identify each machine
attached to a network segment. A data packet is not forwarded to another
segment if its destination MAC address resides on the same segment as its source.
To efficiently separate traffic, the bridge maintains a Bridge Forwarding Table. This
table contains a list of MAC addresses and their associated network segments. The
table is built dynamically from the source MAC addresses of data packets passing
through the bridge.
The OfficeConnect Gateway bridge function supports the Spanning Tree Protocol
(STP). This feature is used when two networks are joined by two bridges to form a
looped network. STP prevents the data packets from circling the two networks.
Additionally, the Bridge Firewall function of the OfficeConnect Gateway lets you
configure the unit to support simultaneous bridging and routing. For more
information on the Bridge Firewall function, see the
Simultaneous Bridging and
Routing
section of this chapter.
Organization of this
Chapter
The information in this chapter is organized into the following sections:
Configure Bridging for the LAN and WAN
Bridging IP Traffic
Advanced Bridging Options
MAC-Encapsulated Routing
Simultaneous Bridging and Routing
Summary of Contents for OfficeConnect 3C100XF
Page 1: ...http www 3com com OfficeConnect Gateway CLI User s Guide Release 1 0 Part No 10042302 Rev AA ...
Page 14: ...xiv ...
Page 18: ...iv ABOUT THIS GUIDE ...
Page 30: ...1 12 CHAPTER 1 USING THE COMMAND LINE INTERFACE CLI ...
Page 50: ...3 14 CHAPTER 3 ADMINISTRATIVE CLI COMMANDS ...
Page 58: ...4 8 CHAPTER 4 CONFIGURING AND MANAGING USERS ...
Page 70: ...6 8 CHAPTER 6 BRIDGING COMMANDS ...
Page 78: ...8 4 CHAPTER 8 INTERFACE COMMANDS ...
Page 82: ...9 4 CHAPTER 9 ARP COMMANDS ...
Page 88: ...11 4 CHAPTER 11 DHCP COMMANDS ...
Page 124: ...12 36 CHAPTER 12 IP ROUTING COMMANDS ...
Page 134: ...13 10 CHAPTER 13 DNS COMMANDS ...
Page 142: ...15 6 CHAPTER 15 MULTICASTING AND IGMP COMMANDS ...
Page 160: ...17 8 CHAPTER 17 PPP COMMANDS ...
Page 182: ...21 6 CHAPTER 21 ADDRESS TRANSLATION COMMANDS ...
Page 186: ...22 4 CHAPTER 22 IPSEC COMMANDS ...
Page 188: ...23 2 CHAPTER 23 SECURITY ASSOCIATION SA COMMANDS ...
Page 192: ...24 4 CHAPTER 24 TCP COMMANDS ...
Page 204: ...25 12 CHAPTER 25 SNMP COMMANDS ...
Page 210: ...26 6 CHAPTER 26 IP FILTERS COMMANDS ...
Page 238: ...29 6 CHAPTER 29 TRACEROUTE COMMANDS ...
Page 255: ...xv RFC 1483 16 3 RFC 1483 MER 16 4 ...
Page 256: ...xvi ...
Page 260: ......