R2511-HP MSR Router Series Layer 3 - IP Services Command Reference(V5)

80
Default command level
2: System level
Usage guidelines
With this function enabled, DHCP snooping compares the chaddr field of a received DHCP request with
the source MAC address field in the frame header. If they are the same, DHCP snooping considers this
request valid and forwards it to the DHCP server. If not, DHCP snooping discards the DHCP request.
The following matrix shows the command in different views and hardware compatibility:
Hardware
Command in Layer 2 aggregate
interface vie
w
Command in WLAN-BSS interface
vie
w
MSR900 No Yes
MSR93X No
Yes (Supported by the JG512A, JG519A
and JG597A)
MSR20-1X No Yes
MSR20 No Yes
MSR30 Yes Yes
MSR50 Yes Yes
MSR1000 Yes Yes
Examples
# Enable MAC address check for DHCP snooping.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] dhcp-snooping check mac-address
dhcp-snooping check request-message
Use dhcp-snooping check request-message to enable DHCP-REQUEST message check of DHCP
snooping.
Use undo dhcp-snooping check request-message to disable DHCP-REQUEST message check of the
DHCP snooping.
Syntax
dhcp-snooping check request-message
undo dhcp-snooping check request-message
Default
This function is disabled.
Views
Layer 2 Ethernet interface view, Layer 2 aggregate interface view, WLAN-BSS interface view
Default command level
2: System level