ZyXEL ISG50-PSTN User Guide - Page 237
Ethernet Summary Screen
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Chapter 12 Interfaces Table 63 Configuration > Network > Interface > Port Role (continued) LABEL DESCRIPTION Apply Click this button to save your changes and apply them to the ISG50. Reset Click this button to change the port groups to their current configuration (last-saved values). 12.3 Ethernet Summary Screen This screen lists every Ethernet interface and virtual interface created on top of Ethernet interfaces. To access this screen, click Configuration > Network > Interface > Ethernet. Unlike other types of interfaces, you cannot create new Ethernet interfaces nor can you delete any of them. If an Ethernet interface does not have any physical ports assigned to it (see Section 12.2 on page 236), the Ethernet interface is effectively removed from the ISG50, but you can still configure it. Ethernet interfaces are similar to other types of interfaces in many ways. They have an IP address, subnet mask, and gateway used to make routing decisions. They restrict the amount of bandwidth and packet size. They can provide DHCP services, and they can verify the gateway is available. Use Ethernet interfaces to control which physical ports exchange routing information with other routers and how much information is exchanged through each one. The more routing information is exchanged, the more efficient the routers should be. However, the routers also generate more network traffic, and some routing protocols require a significant amount of configuration and management. The ISG50 supports two routing protocols, RIP and OSPF. See Chapter 15 on page 302 for background information about these routing protocols. Figure 171 Configuration > Network > Interface > Ethernet ISG50 User's Guide 237
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