Netgear WNR2000 User Manual Page 97
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NETGEAR Wireless-N Router User Manual
Fine-Tuning Your Network 5-17
v1.2, January 2009
The best MTU setting for NETGEAR equipment is often just the default value, and changing the
value might fix one problem but cause another. Leave MTU unchanged unless one of these
situations occurs:
• You have problems connecting to your ISP, or other Internet service, and either the technical
support of the ISP or of NETGEAR recommends changing the MTU size. These might require
an MTU change:
– A secure Web site that will not open, or displays only part of a Web page
–Yahoo e-mail
–MSN
– America Online’s DSL service
• You use VPN and have severe performance problems.
• You used a program to optimize MTU for performance reasons, and now you have
connectivity or performance problems.
If you suspect an MTU problem, a common solution is to change the MTU size to 1400. If you are
willing to experiment, you can gradually reduce the MTU size from the maximum value of 1500
until the problem goes away. Table 5-1 describes common MTU sizes and applications.
Note: An incorrect MTU setting can cause Internet communication problems such as the
inability to access certain Web sites, frames within Web sites, secure login pages,
or FTP or POP servers.
Table 5-1. Common MTU Sizes
MTU Application
1500 The largest Ethernet packet size and the default value. This is the typical setting for non-
PPPoE, non-VPN connections, and is the default value for NETGEAR routers, adapters,
and switches.
1492 Used in PPPoE environments.
1472 Maximum size to use for pinging. (Larger packets are fragmented.)
1468 Used in some DHCP environments.
1460 Usable by AOL if you do not have large e-mail attachments, for example.
1436 Used in PPTP environments or with VPN.
1400 Maximum size for AOL DSL.
576 Typical value to connect to dial-up ISPs.
- NETGEAR Wireless-N 1
- Router WNR2000 User 1
- Industry Canada (IC) 6
- Contents 9
- About This Manual 13
- How to Use This Manual 14
- How to Print This Manual 14
- Revision History 15
- Chapter 1 17
- Figure 1-1 18
- Figure 1-2 19
- Figure 1-3 19
- Figure 1-4 20
- Figure 1-5 21
- Figure 1-6 23
- Figure 1-7 25
- Figure 1-8 26
- Figure 1-9 26
- Figure 1-10 28
- Figure 1-11 29
- Chapter 2 31
- Safeguarding Your Network 31
- Safeguarding Your Network 2-3 33
- 2-4 Safeguarding Your Network 34
- Safeguarding Your Network 2-5 35
- 2-6 Safeguarding Your Network 36
- Safeguarding Your Network 2-7 37
- Figure 2-2 37
- 2-8 Safeguarding Your Network 38
- Safeguarding Your Network 2-9 39
- Figure 2-3 40
- Figure 2-4 41
- Figure 2-5 42
- Push Button Configuration 44
- Security PIN Entry 45
- Figure 2-8 46
- Figure 2-9 46
- Configuring the WPS Settings 47
- Figure 2-11 49
- Figure 2-12 50
- Backing Up Your Configuration 52
- Understanding Your Firewall 53
- Chapter 3 55
- Figure 3-1 56
- Figure 3-2 57
- Figure 3-3 58
- Scheduling Blocking 59
- Field Description 60
- Figure 3-6 62
- Setting the Time Zone 63
- Chapter 4 65
- Configuring a Device Name 66
- Using Address Reservation 69
- Using a Dynamic DNS Service 70
- Disabling the SPI Firewall 72
- Setting the MTU Size 73
- Configuring Static Routes 74
- Figure 4-5 75
- Figure 4-6 75
- Figure 4-7 76
- Wireless Repeating Function 77
- Setting Up the Base Station 78
- Setting Up a Repeater Unit 79
- Chapter 5 81
- Fine-Tuning Your Network 81
- 5-2 Fine-Tuning Your Network 82
- Fine-Tuning Your Network 5-3 83
- 5-4 Fine-Tuning Your Network 84
- Fine-Tuning Your Network 5-5 85
- 5-6 Fine-Tuning Your Network 86
- Adding a Custom Service 87
- 5-8 Fine-Tuning Your Network 88
- Figure 5-2 88
- Fine-Tuning Your Network 5-9 89
- Figure 5-3 89
- Configuring Port Triggering 90
- Fine-Tuning Your Network 5-11 91
- Figure 5-4 91
- 5-12 Fine-Tuning Your Network 92
- Figure 5-5 92
- Fine-Tuning Your Network 5-13 93
- Figure 5-6 93
- Using Universal Plug and Play 94
- Fine-Tuning Your Network 5-15 95
- Changing the MTU Size 96
- Fine-Tuning Your Network 5-17 97
- Table 5-1. Common MTU Sizes 97
- Quality of Service 98
- Fine-Tuning Your Network 5-19 99
- Figure 5-8 99
- 5-20 Fine-Tuning Your Network 100
- Figure 5-9 100
- Fine-Tuning Your Network 5-21 101
- Figure 5-10 101
- Figure 5-11 101
- 5-22 Fine-Tuning Your Network 102
- Figure 5-12 102
- Fine-Tuning Your Network 5-23 103
- Figure 5-13 103
- Technologies 104
- Fine-Tuning Your Network 5-25 105
- 5-26 Fine-Tuning Your Network 106
- Chapter 6 107
- Figure 6-1 108
- Figure 6-2 111
- Set Interval 112
- Figure 6-4 113
- Figure 6-5 114
- Updating the Router Firmware 115
- Figure 6-6 116
- Figure 6-7 116
- Figure 6-8 117
- Figure 6-9 117
- Figure 6-10 119
- Chapter 7 121
- Troubleshooting 121
- 7-2 Troubleshooting 122
- Troubleshooting 7-3 123
- 7-4 Troubleshooting 124
- Login Problems 125
- 7-6 Troubleshooting 126
- Troubleshooting PPPoE 127
- 7-8 Troubleshooting 128
- Troubleshooting 7-9 129
- Problems with Date and Time 130
- Troubleshooting 7-11 131
- 7-12 Troubleshooting 132
- Appendix A 133
- Technical Specifications 133
- A-2 Technical Specifications 134
- General Specifications 135
- A-4 Technical Specifications 136
- Appendix B 137
- Related Documents 137
- B-2 Related Documents 138
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