Dell PowerConnect B-FCXs Configuration Manual page 885

FIGURE 131
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
DHCP Server configuration flow chart
Classify
incoming
message
previous
Yes
Yes
DHCP allocation in
enabled? DB for this
host?
No
No
Use RX Portnum,
Ciaddr field, and
Giaddr field to select
proper address
pool
Yes
Available
address in the
pool?
No
Log error to
system log
DHCP
Yes
release?
No
Yes
DHCP
decline?
No
Yes
DHCP
inform?
No
DHCP
Is request
request
response to
DHCP offer?
No
Request to
extend or
renew lease
Configuring IP parameters – Layer 3 Switches
Reserve the
previous
allocated address
Reserve an
address from the
address pool
No
Check for
requested
address
Yes
from host
Host options
options
requested
parameters
address?
(Requested IP
Address)
Mark address as
available to
another host
Check host decline
Match found?
address against
address pool
Send ACK to host
with all configured
options. Do not include
lease expiration
or yiaddr
accepting
Yes
assigned
address/lease
parameters
Renew or extend
the lease
Send offer to host
and listen for responds?
response
Reserve
the
address
Yes
Requested
address
available?
No
Log error in
system log and
send DHCP NAK
to host
Mark address as
no available and
log config error
Yes in system log
No
Log warning to
system log
Send ACK to
host and listen
for request to
extend, renew, or
release lease
26
Yes
Host
No
End
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