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Thursday, February 18, 2010

Telnet issue with error message "%SEC-4-TOOMANY : Box secured, too many options on internal packet"

Recently we replaced an old module WS-X6408A-GBIC with new module WS-X6724-SFP for C6505-E core switch. After replacing, siter FM tried to telnet to remote core switch, but failed with error message as below:

%SEC-4-TOOMANY : Box secured, too many options on internal packet

Then we tried to telnet locally, the same error message was displayed.

As of Feb 18th this issue is a known IOS bug. To solve the problem, either upgrade the IOS or remove the ip security commands.

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