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)
Содержание EX-3524
Страница 2: ......
Страница 28: ...Figures 28 ...
Страница 34: ...Section I Getting Started 34 ...
Страница 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Страница 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Страница 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Страница 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Страница 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Страница 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Страница 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Страница 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Страница 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Страница 366: ...Chapter 15 Address Table Commands 366 ...
Страница 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Страница 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Страница 578: ...Section I Appendices 578 ...
Страница 594: ...Appendix C Customer Support Manuals 594 ...