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XS1920 Series User’s Guide
220
C
H A P T E R
2 6
IP Source Guard
26.1 IP Source Guard Overview
Use IP source guard to filter unauthorized DHCP and ARP packets in your network.
IP source guard uses a binding table to distinguish between authorized and unauthorized DHCP and
ARP packets in your network. A binding contains these key attributes:
• MAC address
• VLAN ID
• IP address
• Port number
When the Switch receives a DHCP or ARP packet, it looks up the appropriate MAC address, VLAN ID,
IP address, and port number in the binding table. If there is a binding, the Switch forwards the
packet. If there is not a binding, the Switch discards the packet.
26.1.1 What You Can Do
• Use the
IP Source Guard
screen (
) to display the links to the
configuration screens where you can configure IPv4 or IPv6 source guard settings.
• Use the
IPv4 Source Guard Setup
) to look at the current
bindings for DHCP snooping and ARP inspection.
• Use the
IP Source Guard Static Binding
screen (
) to manage static
bindings for DHCP snooping and ARP inspection.
• Use the
DHCP Snooping
screen (
) to look at various statistics about
the DHCP snooping database.
• Use this
DHCP Snooping Configure
screen (
) to enable DHCP
snooping on the Switch (not on specific VLAN), specify the VLAN where the default DHCP server
is located, and configure the DHCP snooping database.
• Use the
DHCP Snooping Port Configure
screen (
) to specify
whether ports are trusted or untrusted ports for DHCP snooping.
• Use the
DHCP Snooping VLAN Configure
screen (
) to enable DHCP
snooping on each VLAN and to specify whether or not the Switch adds DHCP relay agent option
82 information to DHCP requests that the Switch relays to a DHCP server for each VLAN.
• Use the
DHCP Snooping VLAN Port Configure
screen (
) to apply a
different DHCP option 82 profile to certain ports in a VLAN.
• Use the
ARP Inspection Status
screen (
) to look at the current list of
MAC address filters that were created because the Switch identified an unauthorized ARP packet.
• Use the
ARP Inspection VLAN Status
screen (
) to look at various
statistics about ARP packets in each VLAN.
Содержание XS1920 Series
Страница 18: ...18 PART I User s Guide ...
Страница 32: ...32 PART II Technical Reference ...
Страница 171: ...Chapter 21 Classifier XS1920 Series User s Guide 171 Figure 119 Advanced Application Classifier Configuration ...
Страница 177: ...Chapter 21 Classifier XS1920 Series User s Guide 177 Figure 122 Classifier Example EXAMPLE ...
Страница 209: ...Chapter 24 Multicast XS1920 Series User s Guide 209 Figure 143 MVR Group Configuration Example EXAMPLE ...
Страница 383: ...Chapter 50 Configure Clone XS1920 Series User s Guide 383 Figure 273 Management Configure Clone ...
Страница 408: ...Appendix C IPv6 XS1920 Series User s Guide 408 ...
Страница 412: ...Appendix D Legal Information XS1920 Series User s Guide 412 Environmental Product Declaration ...