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Folks,
when playing around with CDP, I discovered several interesting things.
Due the leak of Cisco hardware around here, I ask you for your
expiriences. Details as follows:
Program: http://www.phenoelit.de/irpas/cdp.c
Known effekts:
-IOS 11.1(1):
* when flooding the cisco with random deviceID updates, it reloads
after 3 or 4 packets
without even sending a "TRACE" log entry
* DeviceIDs longer then something around 1000 bytes are recognized as
already known
-other IOS (tested on 11.1(24),11.2(x))
* when flooding the cisco with random deviceID updates, it fills up all
the memory
* when memory is filled up, box does not accept any future telnet
sessions or anything else
which requires memory and crashes some times
* when user does "debug cdp packets", the system reloads after several
lines of output due
the fact that the deviceID is not printable (guess)
* DeviceIDs longer then something around 1000 bytes are NOT recognized
as already known
Regards,
FX
--
dev <dev@phenoelit.de>
Phenoelit (http://www.phenoelit.de)
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