[c-nsp] DHCP behavior on a link up

[Michael Balasko]

Here is what I am getting and I have a fix after piles of digging, but
that doesn't excuse the behavior from Xerox. 

 

We use Cisco Network Registrar for DHCP and after chasing this issue we
have decided to turn off "allow-lease-time-override", which If
allow-lease-time-override is enabled for a policy applicable to the
request, the server accepts a shorter lease time from the client,  which
is where the grief is affecting us. 

 

But the lame part is Xerox wants a pretty long lease- 136years and
change which is awfully close to 2^32 J 

 

 

R1017230: ----- RECEIVED -- R1017230 -----                              

R1017227:   ->    packet length = 314                                   

R1017227:   ->      dhcp-message-type = DHCPDISCOVER                    

R1017227:   ->      dhcp-lease-time = 136y10w6h28m15s                   

R1017227:   ->      dhcp-requested-address = 172.21.154.118             

R1017227:   ->      host-name = XRX6C9AB7                               

 

My DHCP server then hands back a 60 minute lease which its configured
to hand back if a client requests a lease time as opposed to the
"standard lease time" we have defined. I've fixed that tooJ

 

Thanks for the help guys!!!

 

Mike  

 

From: nick hatch [mailto:nicholas.hatch at gmail.com] 
Sent: Thursday, July 09, 2009 10:05 AM
To: cisco-nsp at puck.nether.net
Cc: Michael Balasko
Subject: Re: [c-nsp] DHCP behavior on a link up

 

On Thu, Jul 9, 2009 at 7:46 AM, Michael Balasko
<Michael.Balasko at cityofhenderson.com> wrote:


Perhaps Xerox support could help you understand the reasoning they went
through when the full implications of deviating from the RFC were
carefully weighed... (Ha!)  You've obviously got a problem which falls
under the "full implications" umbrella.

-Nick