Chapter 11 Routing Protocols
ZyWALL USG 50-H User’s Guide
239
11.3 The OSPF Screen
OSPF (Open Shortest Path First, RFC 2328) is a link-state protocol designed to distribute
routing information within a group of networks, called an Autonomous System (AS). OSPF
offers some advantages over vector-space routing protocols like RIP.
• OSPF supports variable-length subnet masks, which can be set up to use available IP
addresses more efficiently.
• OSPF filters and summarizes routing information, which reduces the size of routing tables
throughout the network.
• OSPF responds to changes in the network, such as the loss of a router, more quickly.
• OSPF considers several factors, including bandwidth, hop count, throughput, round trip
time, and reliability, when it calculates the shortest path.
• OSPF converges more quickly than RIP.
Naturally, OSPF is also more complicated than RIP, so OSPF is usually more suitable for
large networks.
OSPF uses IP protocol 89.
OSPF Areas
An OSPF Autonomous System (AS) is divided into one or more areas. Each area represents a
group of adjacent networks and is identified by a 32-bit ID. In OSPF, this number may be
expressed as an integer or as an IP address.
There are several types of areas.
• The backbone is the transit area that routes packets between other areas. All other areas
are connected to the backbone.
MD5
Authentication
ID
This field is available if the
Authentication
is
MD5
. Type the ID for MD5
authentication. The ID can be between 1 and 255.
MD5
Authentication
Key
This field is available if the
Authentication
is
MD5
. Type the password for MD5
authentication. The password can consist of alphanumeric characters and the
underscore, and it can be up to 16 characters long.
Redistribute
Active
Select this check box to advertise routes that were learned from the indicated
Name
.
Name
This field displays other sources of routing information that the ZyWALL can
advertise in the RIP network.
Metric
Type the cost for routes provided by the indicated source. The metric represents
the “cost” of transmission for routing purposes. RIP routing uses hop count as the
measurement of cost, with 1 usually used for directly connected networks. The
number does not have to be precise, but it must be between 0 and 16. In practice,
2 or 3 is usually used.
Apply
Click this button to save your changes to the ZyWALL.
Reset
Click this button to return the screen to its last-saved settings.
Table 87
Network > Routing Protocol > RIP (continued)
LABEL
DESCRIPTION
Содержание ZyWall USG 50-H Series
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Страница 10: ...Safety Warnings ZyWALL USG 50 H User s Guide 10...
Страница 28: ...Table of Contents ZyWALL USG 50 H User s Guide 28...
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Страница 34: ...Chapter 1 Introducing the ZyWALL ZyWALL USG 50 H User s Guide 34...
Страница 40: ...Chapter 2 Features and Applications ZyWALL USG 50 H User s Guide 40...
Страница 92: ...Chapter 5 Configuration Basics ZyWALL USG 50 H User s Guide 92...
Страница 130: ...Chapter 6 Tutorials ZyWALL USG 50 H User s Guide 130...
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Страница 156: ...Chapter 8 Interface ZyWALL USG 50 H User s Guide 156 Figure 128 Network Interface Ethernet Edit wan2...
Страница 157: ...Chapter 8 Interface ZyWALL USG 50 H User s Guide 157 Figure 129 Network Interface Ethernet Edit lan1...
Страница 208: ...Chapter 8 Interface ZyWALL USG 50 H User s Guide 208 Figure 161 Network Interface Bridge Add...
Страница 224: ...Chapter 9 Trunks ZyWALL USG 50 H User s Guide 224...
Страница 250: ...Chapter 12 Zones ZyWALL USG 50 H User s Guide 250...
Страница 280: ...Chapter 16 ALG ZyWALL USG 50 H User s Guide 280...
Страница 286: ...Chapter 17 IP MAC Binding ZyWALL USG 50 H User s Guide 286...
Страница 287: ...287 PART III Firewall Firewall 289...
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Страница 304: ...Chapter 18 Firewall ZyWALL USG 50 H User s Guide 304...
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Страница 313: ...Chapter 19 IPSec VPN ZyWALL USG 50 H User s Guide 313 Figure 238 VPN IPSec VPN VPN Connection Edit IKE...
Страница 356: ...Chapter 21 SSL User Screens ZyWALL USG 50 H User s Guide 356...
Страница 358: ...Chapter 22 SSL User Application Screens ZyWALL USG 50 H User s Guide 358...
Страница 368: ...Chapter 24 L2TP VPN ZyWALL USG 50 H User s Guide 368...
Страница 394: ...Chapter 25 L2TP VPN Example ZyWALL USG 50 H User s Guide 394...
Страница 395: ...395 PART V Application Patrol Application Patrol BWM 397...
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Страница 421: ...421 PART VI Anti X ADP 423...
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Страница 429: ...Chapter 27 ADP ZyWALL USG 50 H User s Guide 429 Figure 359 Profiles Traffic Anomaly...
Страница 432: ...Chapter 27 ADP ZyWALL USG 50 H User s Guide 432 Figure 360 Profiles Protocol Anomaly...
Страница 440: ...Chapter 27 ADP ZyWALL USG 50 H User s Guide 440...
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Страница 462: ...Chapter 29 Addresses ZyWALL USG 50 H User s Guide 462...
Страница 474: ...Chapter 31 Schedules ZyWALL USG 50 H User s Guide 474...
Страница 484: ...Chapter 32 AAA Server ZyWALL USG 50 H User s Guide 484...
Страница 506: ...Chapter 34 Certificates ZyWALL USG 50 H User s Guide 506...
Страница 510: ...Chapter 35 SSL Application ZyWALL USG 50 H User s Guide 510...
Страница 511: ...511 PART VIII System System 513...
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Страница 568: ...Chapter 38 Logs ZyWALL USG 50 H User s Guide 568 Figure 464 Maintenance Log Log Setting Edit System Log...
Страница 584: ...Chapter 40 Diagnostics ZyWALL USG 50 H User s Guide 584...
Страница 586: ...Chapter 41 Reboot ZyWALL USG 50 H User s Guide 586...
Страница 596: ...Chapter 43 Product Specifications ZyWALL USG 50 H User s Guide 596...
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Страница 636: ...Appendix A Log Descriptions ZyWALL USG 50 H User s Guide 636...
Страница 640: ...Appendix B Common Services ZyWALL USG 50 H User s Guide 640...
Страница 646: ...Appendix C Importing Certificates ZyWALL USG 50 H User s Guide 646...