Chapter 8
| General Security Measures
IP Source Guard
– 251 –
Command Usage
◆
Table entries include a MAC address, IP address, lease time, entry type (Static-IP-
SG-Binding, Dynamic-DHCP-Binding), VLAN identifier, and port identifier.
◆
All static entries are configured with an infinite lease time, which is indicated
with a value of zero by the
show ip source-guard
command (
page 254
).
◆
When source guard is enabled, traffic is filtered based upon dynamic entries
learned via DHCP snooping, or static addresses configured in the source guard
binding table with this command.
◆
Static bindings are processed as follows:
■
If there is no entry with same VLAN ID and MAC address, a new entry is
added to binding table using the type of static IP source guard binding.
■
If there is an entry with same VLAN ID and MAC address, and the type of
entry is static IP source guard binding, then the new entry will replace the
old one.
■
If there is an entry with same VLAN ID and MAC address, and the type of the
entry is dynamic DHCP snooping binding, then the new entry will replace
the old one and the entry type will be changed to static IP source guard
binding.
Example
This example configures a static source-guard binding on port 5.
Console(config)#ip source-guard binding 00-ab-cd-11-22-33 vlan 1 192.168.0.99
interface ethernet 1/5
Console(config-if)#
Related Commands
ip source-guard (252)
ip dhcp snooping (242)
ip dhcp snooping vlan (246)
Summary of Contents for EX-3524
Page 2: ......
Page 28: ...Figures 28 ...
Page 34: ...Section I Getting Started 34 ...
Page 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Page 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Page 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Page 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Page 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Page 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Page 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Page 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Page 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Page 366: ...Chapter 15 Address Table Commands 366 ...
Page 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Page 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Page 578: ...Section I Appendices 578 ...