Chapter 26 IP Source Guard

 

 

 

 

Table 84 DHCP Snooping Configure (continued)

 

LABEL

DESCRIPTION

 

Renew DHCPEnter the location of a DHCP snooping database, and click Renew if you want the

 

Snooping URL

Switch to load it. You can use this to load dynamic bindings from a different DHCP

 

 

snooping database than the one specified in Agent URL.

 

 

When the Switch loads dynamic bindings from a DHCP snooping database, it does not

 

 

discard the current dynamic bindings first. If there is a conflict, the Switch keeps the

 

 

dynamic binding in volatile memory and updates the Binding collisions counter in the

 

 

DHCP Snooping screen (Section 26.4 on page 221).

 

 

 

 

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch loses

 

 

these changes if it is turned off or loses power, so use the Save link on the top

 

 

navigation panel to save your changes to the non-volatile memory when you are done

 

 

configuring.

 

 

 

 

Cancel

Click this to reset the values in this screen to their last-saved values.

 

 

 

26.5.1 DHCP Snooping Port Configure

Use this screen to specify whether ports are trusted or untrusted ports for DHCP snooping.

Note: The Switch will drop all DHCP requests if you enable DHCP snooping and there are no trusted ports.

You can also specify the maximum number for DHCP packets that each port (trusted or untrusted) can receive each second. To open this screen, click Advanced Application > IP Source Guard > DHCP Snooping > Configure > Port.

Figure 121 DHCP Snooping Port Configure

 

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ES3500 Series User’s Guide