Hi,

We have a strange problem: packetfence inline on a HP Procurve 5412 chassis.

We have occasional problems with devices that cannot connect. The logs 
on the clientdevice indicate that client dhcp is trying to obtain an 
address:
> May 23 17:07:56 T430s dhclient: DHCPREQUEST of 10.19.227.120 on eth0 to 
> 255.255.255.255 port 67 (xid=0x70d4fac)
> May 23 17:08:02 T430s dhclient: DHCPREQUEST of 10.19.227.120 on eth0 to 
> 255.255.255.255 port 67 (xid=0x762d63ef)
> May 23 17:08:17 T430s dhclient: DHCPREQUEST of 10.19.227.120 on eth0 to 
> 255.255.255.255 port 67 (xid=0x399c2476)
However: NONE of the above requests are logged in the pfdhcplistener.log 
file.

THEN the client tries again the same:
> May 23 17:08:20  T430s dhclient: DHCPREQUEST of 10.19.227.120 on eth0 to 
255.255.255.255 port 67 (xid=0x399c2476)
and suddenly this request IS detected and logged in pfdhcplistener.log:
> May 23 17:08:20 pfqueue(21972) INFO: [mac:unknown] DHCPREQUEST from 
> 3c:97:0e:2f:14:f8 (10.19.227.120) (pf::dhcp::processor::parse_dhcp_request)
> May 23 17:08:22 pfqueue(21972) INFO: [mac:3c:97:0e:2f:14:f8] 
> 3c:97:0e:2f:14:f8 requested an IP with the following informations: last_dhcp 
> = 2016-05-23 17:08:20,computername = T430s,dhcp_fingerprint = 
> 1,28,2,3,15,6,119,12,44,47,26,121,42,121,249,33,252,42,dhcp_vendor =  
> (pf::dhcp::processor::process_packet)

and this request is also answered, and my client can connect:
> May 23 17:08:21 T430s dhclient: DHCPACK of 10.19.227.120 from 10.19.0.1
> May 23 17:08:21 T430s dhclient: bound to 10.19.227.120 -- renewal in 7226165 
> seconds.

Our question: Is it expected that so many requests (we have more 
examples like this) go 'unnoticed' in pfdhcplistener.log, and also seem 
to be left unanswered?

We have complaints that (during peak hours) users have difficulties 
connecting to our system.

Are we on to something, or are we looking in the wrong files..? (or 
misunderstanding packetfence workings..?)

Any feedback would be appreciated!

MJ


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