DHCP snooping & PXE server

Unanswered Question
Nov 26th, 2009
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Hi,

Did anyone solved this scenario?


                               ------------------

DHCP server -----------|      ASA     | ------------------------------ stations + PXE server

                               ------------------


1) when DHCP snooping is off, everything works fine - PXE client receives address from DHCP server and also address of PXE server

2) when I turn on DHCP snooping, PXE client receives IP address from DHCP server, but doesn't know about PXE server


Modification of parameters 66,67 in DHCP server didn't help - client located PXE server, but stopped on loading bootwiz.sys and timeouted.


Thank you.

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Giuseppe Larosa Thu, 11/26/2009 - 06:50
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Hello,

preliminary question:

have you tried to trust the port where the PXE server is connected?


second question:

what switch model is involved and what IOS image is running?


I remember threads where some SW bugs related to PXE and DHCP snooping have been mentioned.

Having this information would help to narrow the search in bug toolkit tool.


I can confirm that there were issues for some switches with specific IOS versions



Hope to help

Giuseppe

zvondovec Thu, 11/26/2009 - 07:04
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Hi,

1) of course I did - didn't help

2) c2960-lanbasek9-mz.122-52.SE.bin


thanks

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