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New Member

Data structure error

i send this for documentation , hoping it can be useful.

had this on log....

1667C44 16690C4 1669248 1B8D06C 1B83AF8 (switch_name)
Jan 23 11:03:43: %UTIL-3-TREE: Data structure error--attempt to remove an unthreaded node from a tree (switch_name)
-Traceback= 2A3F898 1441444 1441784 1442658 13EC0F8 13F6BC8 13F702C 13F8AF8 1667C44 16690C4 1669248 1B8D06C 1B83AF8 (switch_name)

this is the 3750 stack

Switch    Ports     Model               SW Version        SW Image
------       -----       -----                    ----------              ----------
1             52      WS-C3750-48P   12.2(53)SE2     C3750-IPBASEK9-M
2            52       WS-C3750-48P   12.2(53)SE2     C3750-IPBASEK9-M
* 3         52       WS-C3750-48P    12.2(53)SE2     C3750-IPBASEK9-M
4           52       WS-C3750-48P    12.2(53)SE2     C3750-IPBASEK9-M

it looks like this is following some problems to achive radius servers.

stack looks like stable now and no messages in log at the moment.

Super Bronze

Generally, anytime you see a

Generally, anytime you see a traceback, it's related to a bug.  You might try updating your IOS to a later patch release, as something like SE2 would be early in the lifetime of an IOS.

You might also consider updating to a later IOS.  The latest patch releases in train 12.2(55) appear to be very stable.

New Member

thankyou Joseph. i will try

thankyou Joseph. i will try to update IOS to the latest release and see what happen.

I think this is the first time we had this problem, even if we have hundred of switch installed with many different IOS release and models. 

I will try to search on logs for 'traceback' and see if something interesting come out.

will post if i'll find something interesting.

thank you