Dell PowerEdge VRTX - Manual (Page 386)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSwitching_DHCP.fm
D E L L C O N F ID E N T IA L – P R E L IM I N A RY 4 / 1 8 /1 3 - F O R P R O O F O N LY
Table 17-1. DHCP Packet Handling when DHCP Snooping is Enabled
Packet Type Arriving from Untrusted
Ingress Interface Arriving from Trusted
Ingress Interface
DHCPDISCOVER Forward to trusted
interfaces only.
Forwarded to trusted
interfaces only.
DHCPOFFER Filter. Forward the packet
according to DHCP
information. If the
destination address is
unknown the packet is
filtered.
DHCPREQUEST Forward to trusted
interfaces only.
Forward to trusted
interfaces only.
DHCPACK Filter. Same as DHCPOFFER
and an entry is added to
the Binding database.
DHCPNAK Filter. Same as DHCPOFFER.
Remove entry if exists.
DHCPDECLINE Check if there is
information in the
database. If the
information exists and
does not match the
interface on which the
message was received, the
packet is filtered.
Otherwise the packet is
forwarded to trusted
interfaces only, and the
entry is removed from
database.
Forward to trusted
interfaces only
DHCPRELEASE Same as
DHCPDECLINE.
Same as
DHCPDECLINE.
DHCPINFORM Forward to trusted
interfaces only.
Forward to trusted
interfaces only.
DHCPLEASEQUERY Filtered. Forward.