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Cisco 4240 IPS Inline and CDP neighbor

Has anyone seen IPS device block CDP or prevent CDP?

I was told that the Inline IPS device is preventing the use of CDP.

3 REPLIES
Cisco Employee

Re: Cisco 4240 IPS Inline and CDP neighbor

It does block CDP by design.

New Member

Re: Cisco 4240 IPS Inline and CDP neighbor

Is there a way to unblock CDP? What else does it block by design?

New Member

Re: Cisco 4240 IPS Inline and CDP neighbor

Found that the CDP issue is a reported bug.

CSCsg45642 Bug Details

Symptom:

CDP traffic is not passed from one interface to the other in an inline pair.

Conditions:

Sensor running 5.1.1 or later configured in inline mode. Bypass mode enabled or disabled.

Workaround:

None at this time.

Further Problem Description:

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsg45642

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