Source Address Validation - Dell Z9000 Configuration Manual

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Internet 10.1.1.251
Internet 10.1.1.252
Internet 10.1.1.253
Internet 10.1.1.254
Dell#
To see how many valid and invalid ARP packets have been processed, use the show arp inspection
statistics command.
Dell#show arp inspection statistics
Dynamic ARP Inspection (DAI) Statistics
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Valid ARP Requests
Valid ARP Replies
Invalid ARP Requests
Invalid ARP Replies
Dell#
Bypassing the ARP Inspection
You can configure a port to skip ARP inspection by defining the interface as trusted, which is useful in
multi-switch environments.
ARPs received on trusted ports bypass validation against the binding table. All ports are untrusted by
default.
To bypass the ARP inspection, use the following command.
• Specify an interface as trusted so that ARPs are not validated against the binding table.
INTERFACE mode
arp inspection-trust
Dell Networking OS Behavior: Introduced in Dell Networking OS version 8.2.1.0, DAI was available for
Layer 3 only. However, Dell Networking OS version 8.2.1.1 extends DAI to Layer 2.

Source Address Validation

Using the DHCP binding table, Dell Networking OS can perform three types of source address validation
(SAV).
Table 13. Three Types of Source Address Validation
Source Address Validation
IP Source Address Validation
DHCP MAC Source Address Validation
IP+MAC Source Address Validation
266
- 00:00:4d:57:f2:50
- 00:00:4d:57:e6:f6
- 00:00:4d:57:f8:e8
- 00:00:4d:69:e8:f2
: 0
: 1000
: 1000
: 0
Te 1/2
Te 1/1
Te 1/3
Te 1/5
Description
Prevents IP spoofing by forwarding only IP packets
that have been validated against the DHCP binding
table.
Verifies a DHCP packet's source hardware address
matches the client hardware address field
(CHADDR) in the payload.
Verifies that the IP source address and MAC source
address are a legitimate pair.
Dynamic Host Configuration Protocol (DHCP)
Vl 10 CP
Vl 10 CP
Vl 10 CP
Vl 10 CP