Home » ZyXEL Manuals » Bridges & Routers » ZyXEL NBG4115 » Manual Viewer

ZyXEL NBG4115 User Guide - Page 99

Multicast, NetBIOS over TCP/IP, Maximum Transmission Unit, Auto-Bridge, IGMP-v1

Add to My Manuals
Save this manual to your list of manuals

Page 99 highlights

Chapter 8 WAN Multicast Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of hosts on the network - not everybody and not just 1. Figure 59 Multicast Example A B Server In the multicast example above, systems A and B comprise one multicast group. In multicasting, the server only needs to send one data stream and this is delivered to systems A and B. IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership in a multicast group - it is not used to carry user data. The NBG4115 supports both IGMP version 1 (IGMP-v1) and IGMP version 2 (IGMP-v2). At start up, the NBG4115 queries all directly connected networks to gather group membership. After that, the NBG4115 periodically updates this information. IP multicasting can be enabled/ disabled on the NBG4115 LAN and/or WAN interfaces in the Web Configurator (LAN; WAN). Select None to disable IP multicasting on these interfaces. NetBIOS over TCP/IP NetBIOS (Network Basic Input/Output System) are TCP or UDP broadcast packets that enable a computer to connect to and communicate with a LAN. For some dial-up services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls. However it may sometimes be necessary to allow NetBIOS packets to pass through to the WAN in order to find a computer on the WAN. Maximum Transmission Unit A maximum transmission unit (MTU) is the largest size packet or frame, specified in octets (eightbit bytes) that can be sent in a packet- or frame-based network. The Transmission Control Protocol (TCP) uses the MTU to determine the maximum size of each packet in any transmission. Too large an MTU size may mean retransmissions if the packet encounters a router that can't handle that large a packet. Too small an MTU size means relatively more header overhead and more acknowledgements that have to be sent and handled. Auto-Bridge In the rear panel of your NBG4115, you can see two LAN ports (1 to 2) and one WAN port. The WAN port is for your Internet access connection, and the LAN ports are for your network devices. The WAN port has a different IP address from the LAN ports. When you enable auto-bridging in your NBG4115, all three ports (2 LAN ports and the WAN port) share the same IP address. This might happen if you put the NBG4115 behind a NAT router that assigns it this IP address. When the NBG4115 is in auto-bridge mode, the NBG4115 acts as an AP NBG4115 User's Guide 99

Section	Page
NBG4115	1
Contents Overview	3
Table of Contents	5
User’s Guide	13
Introduction	15
1.1 Overview	15
1.2 Applications	15
1.3 Ways to Manage the NBG4115	15
1.4 Good Habits for Managing the NBG4115	16
1.5 LEDs	16
1.6 The WPS Button	17
1.7 Wall Mounting	18
ZyXEL NetUSB Share Center Utility	19
2.1 Overview	19
2.1.1 Quick Setup	20
2.1.2 Installing ZyXEL NetUSB Share Center Utility	20
2.2 The ZyXEL NetUSB Share Center Utility	21
2.2.1 The Menus	22
2.2.2 The Share Center Configuration Window	23
2.2.3 The Auto-Connect Printer List Window	24
2.3 Manually Connecting to USB Devices	24
2.4 Automatically Connecting to a USB Printer	26
The Web Configurator	29
3.1 Overview	29
3.2 Accessing the Web Configurator	29
3.3 Resetting the NBG4115	31
3.3.1 Procedure to Use the Reset Button	31
3.4 Navigating the Web Configurator	31
3.5 The Status Screen in Router Mode	31
3.5.1 Navigation Panel	35
3.5.2 Summary: DHCP Table	37
3.5.3 Summary: Packet Statistics	38
3.5.4 Summary: WLAN Station Status	38
Connection Wizard	41
4.1 Overview	41
4.2 Wizard Setup	41
4.3 STEP 1: System Information	42
4.3.1 System Name	42
4.3.2 Domain Name	42
4.4 STEP 2: Wireless LAN	43
4.4.1 Extend (WPA-PSK or WPA2-PSK) Security	44
4.5 STEP 3: Internet Configuration	45
4.5.1 Ethernet Connection	46
4.5.2 PPPoE Connection	46
4.5.3 PPTP Connection	47
4.5.4 Mobile 3G	49
4.5.5 Your IP Address	50
4.5.6 WAN IP Address Assignment	50
4.5.7 IP Address and Subnet Mask	51
4.5.8 DNS Server Address Assignment	51
4.5.9 WAN IP and DNS Server Address Assignment	52
4.5.10 WAN MAC Address	53
4.6 Connection Wizard Complete	54
AP Mode	55
5.1 Overview	55
5.2 Setting your NBG4115 to AP Mode	55
5.3 The Status Screen in AP Mode	56
5.3.1 Navigation Panel	58
5.4 LAN Settings	59
5.5 WLAN and Maintenance Settings	60
5.6 Logging in while in AP Mode	60
Tutorials	61
6.1 Overview	61
6.2 Set Up a 3G Connection	61
6.3 Set Up the NBG4115 for Gaming	63
6.4 Set Up a Wireless Network with WPS	65
6.4.1 Push Button Configuration (PBC)	66
6.4.2 PIN Configuration	67
6.5 Configure Wireless Security without WPS	68
6.5.1 Configure Your Notebook	70
6.6 Bandwidth Management	71
6.6.1 Bandwidth Management by Application	71
6.6.2 Custom Bandwidth Management	72
6.6.3 Bandwidth Management by IP or IP Range	73
Technical Reference	75
Wireless LAN	77
7.1 Overview	77
7.1.1 What You Can Do in this Chapter	77
7.1.2 What You Should Know	78
7.2 General	80
7.2.1 No Security	82
7.2.2 WEP Encryption	83
7.2.3 WPA-PSK/WPA2-PSK	85
7.3 MAC Filter	86
7.4 Advanced	87
7.5 QoS	89
7.5.1 Application Priority Configuration	90
7.6 WPS	92
7.7 WPS Station	93
7.8 Scheduling	94
WAN	97
8.1 Overview	97
8.2 What You Can Do in this Chapter	97
8.2.1 What You Need To Know	98
8.3 The General Screen	100
8.4 The WAN1 Internet Connection Screen	102
8.4.1 Ethernet	103
8.4.2 PPPoE	104
8.4.3 PPTP	106
8.4.4 Mobile 3G	108
8.5 The Advanced Screen	110
LAN	113
9.1 Overview	113
9.1.1 What You Can Do in this Chapter	113
9.2 What You Need To Know	113
9.3 IP	114
DHCP Server	117
10.1 Overview	117
10.1.1 What You Can Do in this Chapter	117
10.1.2 What You Need To Know	117
10.2 General	118
10.3 Advanced	119
10.4 Client List	120
NAT	123
11.1 Overview	123
11.1.1 What You Can Do in this Chapter	123
11.1.2 What You Need To Know	124
11.2 General	125
11.3 Application	126
11.4 Advanced	129
11.5 Technical Reference	130
11.5.1 NATPort Forwarding: Services and Port Numbers	130
11.5.2 NAT Port Forwarding Example	130
11.5.3 Trigger Port Forwarding	130
11.5.4 Trigger Port Forwarding Example	131
11.5.5 Two Points To Remember About Trigger Ports	131
DDNS	133
12.1 Overview	133
12.2 General	133
Firewall	135
13.1 Overview	135
13.1.1 What You Can Do in this Chapter	135
13.1.2 What You Need To Know	135
13.2 General	137
13.3 Services	137
Content Filtering	139
14.1 Overview	139
14.1.1 What You Can Do in this Chapter	139
14.1.2 What You Need To Know	139
14.2 Filter	140
14.3 Technical Reference	141
14.3.1 Customizing Keyword Blocking URL Checking	141
Static Route	143
15.1 Overview	143
15.1.1 What You Can Do in this Chapter	143
15.2 IP Static Route	144
15.2.1 Static Route Setup Screen	145
Bandwidth Management	146
16.1 Overview	146
16.1.1 What You Can Do in this Chapter	146
16.1.2 What You Need To Know	146
16.2 General	147
16.3 Advanced	148
16.3.1 Pre-Configured Gaming Ports	151
16.3.2 Priority Levels	151
16.3.3 User Defined Service Rule Configuration	151
16.3.4 Predefined Bandwidth Management Services	152
16.3.5 Services and Port Numbers	153
Remote Management	154
17.1 Overview	154
17.1.1 What You Can Do in this Chapter	154
17.1.2 What You Need To Know	154
17.2 WWW	155
UPnP	156
18.1 Overview	156
18.1.1 What You Can Do in this Chapter	156
18.1.2 What You Need to Know	156
18.2 General	157
18.3 Technical Reference	158
18.3.1 Installing UPnP in Windows XP	158
WoL	164
19.1 Overview	164
19.1.1 What You Can Do in this Chapter	164
19.2 The WoL General Screen	164
NetUSB	166
20.1 Overview	166
20.1.1 What You Can Do in this Chapter	166
20.1.2 What You Need to Know	166
20.2 The NetUSB General Screen	167
System	169
21.1 Overview	169
21.1.1 What You Can Do in this Chapter	169
21.2 General	169
21.3 Time Setting	171
Logs	174
22.1 Overview	174
22.1.1 What You Can Do in this Chapter	174
22.2 View Log	174
Tools	176
23.1 Overview	176
23.1.1 What You Can Do in this Chapter	176
23.2 Firmware	176
23.3 Configuration	178
23.3.1 Backup Configuration	178
23.3.2 Restore Configuration	178
23.3.3 Back to Factory Defaults	179
23.4 Restart	180
Sys OP Mode	181
24.1 Overview	181
24.1.1 What You Can Do in this Chapter	181
24.1.2 What You Need to Know	181
24.2 General	182
Language	184
25.1 Overview	184
25.2 Language	184
Troubleshooting	185
26.1 Overview	185
26.2 Power, Hardware Connections, and LEDs	185
26.3 NBG4115 Access and Login	186
26.4 Internet Access	188
26.5 Resetting the NBG4115 to Its Factory Defaults	189
26.6 Wireless Router/AP Troubleshooting	189
26.7 ZyXEL NetUSB Share Center Utility Problems	190
Pop-up Windows, JavaScripts and Java Permissions	193
IP Addresses and Subnetting	205
Setting Up Your Computer’s IP Address	215
Wireless LANs	243
Common Services	257
Legal Information	261

Match case Limit results 1 per page

Chapter 8 WAN

NBG4115 User’s Guide

Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient)

or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of

hosts on the network - not everybody and not just 1.

Figure 59

Multicast Example

In the multicast example above, systems A and B comprise one multicast group. In multicasting,

the server only needs to send one data stream and this is delivered to systems A and B.

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership

in a multicast group - it is not used to carry user data. The NBG4115 supports both IGMP version 1

(

IGMP-v1

) and IGMP version 2 (

IGMP-v2

At start up, the NBG4115 queries all directly connected networks to gather group membership.

After that, the NBG4115 periodically updates this information. IP multicasting can be enabled/

disabled on the NBG4115 LAN and/or WAN interfaces in the Web Configurator (

LAN

;

WAN

). Select

None

to disable IP multicasting on these interfaces.

NetBIOS over TCP/IP

NetBIOS (Network Basic Input/Output System) are TCP or UDP broadcast packets that enable a

computer to connect to and communicate with a LAN. For some dial-up services such as PPPoE or

PPTP, NetBIOS packets cause unwanted calls. However it may sometimes be necessary to allow

NetBIOS packets to pass through to the WAN in order to find a computer on the WAN.

Maximum Transmission Unit

A maximum transmission unit (MTU) is the largest size packet or frame, specified in octets (eight-

bit bytes) that can be sent in a packet- or frame-based network. The Transmission Control Protocol

(TCP) uses the MTU to determine the maximum size of each packet in any transmission. Too large

an MTU size may mean retransmissions if the packet encounters a router that can't handle that

large a packet. Too small an MTU size means relatively more header overhead and more

acknowledgements that have to be sent and handled.

Auto-Bridge

In the rear panel of your NBG4115, you can see two LAN ports (1 to 2) and one WAN port. The WAN

port is for your Internet access connection, and the LAN ports are for your network devices. The

WAN port has a different IP address from the LAN ports.

When you enable auto-bridging in your NBG4115, all three ports (2 LAN ports and the WAN port)

share the same IP address. This might happen if you put the NBG4115 behind a NAT router that

assigns it this IP address. When the NBG4115 is in auto-bridge mode, the NBG4115 acts as an AP

Server