Chapter 26 IP Source Guard
MES-3528 User’s Guide
235
The following table describes the labels in this screen.
Table 74
DHCP Snooping Configure
LABEL
DESCRIPTION
Active
Select this to enable DHCP snooping on the Switch. You still have
to enable DHCP snooping on specific VLAN and specify trusted
ports.
Note: If DHCP is enabled and there are no trusted ports,
DHCP requests will not succeed.
DHCP Vlan
Select a VLAN ID if you want the Switch to forward DHCP packets
to DHCP servers on a specific VLAN.
Note: You have to enable DHCP snooping on the DHCP
VLAN too.
You can enable Option82 in the DHCP Snooping VLAN
Configure screen (
) to help the DHCP
servers distinguish between DHCP requests from different VLAN.
Select Disable if you do not want the Switch to forward DHCP
packets to a specific VLAN.
Database
If Timeout interval is greater than Write delay interval, it is
possible that the next update is scheduled to occur before the
current update has finished successfully or timed out. In this
case, the Switch waits to start the next update until it completes
the current one.
Agent URL
Enter the location of the DHCP snooping database. The location
should be expressed like this: tftp://{domain name or IP
address}/directory, if applicable/file name; for example,
tftp://192.168.10.1/database.txt.
Timeout interval
Enter how long (10-65535 seconds) the Switch tries to complete a
specific update in the DHCP snooping database before it gives up.
Write delay
interval
Enter how long (10-65535 seconds) the Switch waits to update
the DHCP snooping database the first time the current bindings
change after an update. Once the next update is scheduled,
additional changes in current bindings are automatically included
in the next update.
Renew DHCP
Snooping URL
Enter the location of a DHCP snooping database, and click Renew
if you want the 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 (
).
Summary of Contents for MES-3528 -
Page 2: ......
Page 8: ...Safety Warnings MES 3528 User s Guide 8 ...
Page 22: ...22 ...
Page 32: ...Chapter 2 Hardware Installation and Connection MES 3528 User s Guide 32 ...
Page 42: ...Chapter 3 Hardware Overview MES 3528 User s Guide 42 ...
Page 44: ...44 ...
Page 60: ...Chapter 5 Initial Setup Example MES 3528 User s Guide 60 ...
Page 76: ...Chapter 7 System Status and Port Statistics MES 3528 User s Guide 76 ...
Page 88: ...Chapter 8 Basic Setting MES 3528 User s Guide 88 ...
Page 90: ...90 ...
Page 109: ...Chapter 9 VLAN MES 3528 User s Guide 109 Figure 57 Port Based VLAN Setup Port Isolation ...
Page 114: ...Chapter 10 Static MAC Forward Setup MES 3528 User s Guide 114 ...
Page 146: ...Chapter 14 Bandwidth Control MES 3528 User s Guide 146 ...
Page 160: ...Chapter 17 Link Aggregation MES 3528 User s Guide 160 ...
Page 168: ...Chapter 19 Port Security MES 3528 User s Guide 168 ...
Page 180: ...Chapter 21 Policy Rule MES 3528 User s Guide 180 ...
Page 192: ...Chapter 23 VLAN Stacking MES 3528 User s Guide 192 ...
Page 231: ...Chapter 26 IP Source Guard MES 3528 User s Guide 231 Figure 120 DHCP Snooping ...
Page 248: ...Chapter 26 IP Source Guard MES 3528 User s Guide 248 ...
Page 257: ...257 PART IV IP Application Static Route 259 Differentiated Services 263 DHCP 267 ...
Page 258: ...258 ...
Page 262: ...Chapter 29 Static Route MES 3528 User s Guide 262 ...
Page 274: ...Chapter 31 DHCP MES 3528 User s Guide 274 ...
Page 276: ...276 ...
Page 284: ...Chapter 32 Maintenance MES 3528 User s Guide 284 ...
Page 306: ...Chapter 33 Access Control MES 3528 User s Guide 306 ...
Page 312: ...Chapter 35 Syslog MES 3528 User s Guide 312 ...
Page 320: ...Chapter 36 Cluster Management MES 3528 User s Guide 320 ...
Page 324: ...Chapter 37 MAC Table MES 3528 User s Guide 324 ...
Page 330: ...330 ...
Page 342: ...Chapter 41 Product Specifications MES 3528 User s Guide 342 ...
Page 344: ...344 ...
Page 346: ...Appendix A Changing a Fuse MES 3528 User s Guide 346 ...
Page 354: ...Appendix C Legal Information MES 3528 User s Guide 354 ...
Page 364: ...Index MES 3528 User s Guide 364 ...