ZyXEL Communications IES-708 Guía de usuario descargar pdf (Pagina 185)

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IES-708-22A User’s Guide

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CHAPTER 27

DHCP Snoop

This feature is available in STU-C mode only.

This chapter shows you how to set up DHCP snooping settings on the subscriber ports.

27.1 DHCP Snoop Overview

DHCP snooping prevents clients from assigning their own IP addresses. The IES-708-22A can

store every (DSL port, MAC address, IP address) tuple offered by the DHCP server. Then, it

only forwards packets from clients whose MAC address and IP address are recorded. Packets

from unknown IP addresses are dropped.

27.2 DHCP Snoop Screen

Use this screen to activate or deactivate DHCP snooping on each port. To open this screen,

click Advanced Application > DHCP Snoop.

Figure 91 Advanced Application > DHCP Snoop

The following table describes the labels in this screen.

Table 57 Advanced Application > DHCP Snoop

LABEL DESCRIPTION

DHCP Snoop Status Click DHCP Snoop Status to open the screen where you can look at or clear

the current DHCP snooping table on each port (see Section 27.3 on page 186).

DHCP Counter Click DHCP Counter to open the screen where you can look at a summary of

the DHCP packets on each port (see Section 27.4 on page 187).

Port This field displays each DSL port number.

Active This field displays whether DHCP snooping is active (“V”) or inactive (“-”) on this

port.

1 2 ... 180 181 182 183 184 185 186 187 188 189 190 ... 447 448

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