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We get an error &quot;%CLNS-3-BADPACKET: ISIS: LAN L1 hello, Duplicate system ID&quot; on each of our 2 6500 switches running ISIS. &nbsp;The system ID's have been checked and are fine. &nbsp;A 802.1q trunk connects the two switches. &nbsp;We get the error every 60 seconds for 7-8 minutes in a row about every 2-3 hours.<br />
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There is no information on this error on Cisco's website. &nbsp;MTU size is fine on each switch.
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We get an error "%CLNS-3-BADPACKET: ISIS: LAN L1 hello, Duplicate system ID" on each of our 2 6500 switches running ISIS.  The system ID's have been checked and are fine.  A 802.1q trunk connects the two switches.  We get the error every 60 seconds for 7-8 minutes in a row about every 2-3 hours.

There is no information on this error on Cisco's website.  MTU size is fine on each switch.

%CLNS-3-BADPACKET: ISIS: LAN L1 hello, Duplicate system ID

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