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IP Helper/DHCP Relay Commands
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Example
console#show ip helper statistics
DHCP client messages received.................. 8
DHCP client messages relayed................... 2
DHCP server messages received.................. 2
DHCP server messages relayed................... 2
UDP client messages received................... 8
UDP client messages relayed.................... 2
UDP client 
messages relayed
The number of UDP packets relayed. This count includes 
DHCP messages relayed as well as all other protocols. The count 
is incremented for each server to which a packet is sent.
DHCP message 
hop count 
exceeded max
The number of DHCP client messages received whose hop 
count is larger than the maximum allowed. The maximum hop 
count is a configurable value listed in 
message is written for each such failure. The DHCP relay agent 
does not relay these packets.
DHCP message 
with secs field 
below min
The number of DHCP client messages received with secs fields 
that are less than the minimum value. The minimum secs value 
is a configurable value and is displayed in 
log message is written for each such failure. The DHCP relay 
agent does not relay these packets.
DHCP message 
with giaddr set to 
local address
The number of DHCP client messages received whose gateway 
address, giaddr, is already set to an IP address configured on one 
of the relay agent's own IP addresses. In this case, another device 
is attempting to spoof the relay agent's address. The relay agent 
does not relay such packets. A log message gives details for each 
occurrence.
Packets with 
expired TTL
The number of packets received with TTL of 0 or 1 that might 
otherwise have been relayed.
Packets that 
matched a discard 
entry
The number of packets ignored by the relay agent because they 
match a discard relay entry.
2CSPC4.X8100-SWUM102.book  Page 1055  Friday, March 15, 2013  8:56 AM