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Ciscoworks »
« [Config] DynDNS.org on Cisco 871  
highland8

join:2005-05-24
POLAND

pix and fragment riddle

Hello

On CCSP i have question:
pixfirewall# show fragment
Interface: outside
Size: 200, Chain: 24, Timeout: 5, Threshold: 133

How may fragment packets have entered the outside interface of the PIX Security Appliance since the last time the clear fragment command was executed ?
There are several answers: 133,200,900,915,920,935
And 935 is correct. Why ??
snarohyans

join:2005-11-10
Indianapolis, IN

Re: pix and fragment riddle

It looks to me like there is a portion missing to that question...

Typically when executing that command, you should get the following:

pixfirewall(config)# show fragment outside
Interface: outside
Size:2000, Chain:45, Timeout:10
Queue:1060, Assemble:809, Fail:0, Overflow:0

Which indicates:

•A database size limit of 2000 packets.
•The chain length limit of 45 fragments.
•A timeout of ten seconds.
•1060 packets currently awaiting re-assembly.
•809 packets have been fully reassembled.
•No failure.
•No overflow.

Therefore, to answer the question, you would add up the queue and assembled tallies to come up with a total of the number of fragmented packets that have entered the interface.

It sounds incomplete to me, but I might be missing something

Hope this helps!
Aaron
Forums » Equipment Support » Hardware By Brand » CiscoCiscoworks »
« [Config] DynDNS.org on Cisco 871  


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