I think the question should state * The packet is dropped by an ACL
Here is the resource. http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfnfc.html#wp1014686 Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr. Instructor - IPexpert, Inc. Mailto: <mailto:[email protected]> [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: <http://www.ipexpert.com/chat> www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at <http://www.ipexpert.com/communities> www.ipexpert.com/communities and our public website at <http://www.ipexpert.com/> www.ipexpert.com From: Bruno [mailto:[email protected]] Sent: Thursday, August 04, 2011 4:53 PM To: Tyson Scott Subject: Re: [OSL | CCIE_Security] Netflow Sorry, I caught this from Yusuf's flash cards. the subject is netflow where he asks what is the meaning of Null keyword on the field DestIf when we do show ip cache flow His answer is as I pasted On a router, the DestIf shows that Null is normal in circumstances when: * The packet is a broadcast or a multicast. * The packet does not match an ACL, and has been dropped. * The packet has been process switched. On Thu, Aug 4, 2011 at 5:47 PM, Tyson Scott <[email protected]> wrote: Can you give more context to your questions below and a resource. Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr. Instructor - IPexpert, Inc. Mailto: [email protected] Telephone: +1.810.326.1444, ext. 208 <tel:%2B1.810.326.1444%2C%20ext.%20208> Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 <tel:%2B1.810.454.0130> IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com <http://www.ipexpert.com/> From: [email protected] [mailto:[email protected]] On Behalf Of Bruno Sent: Thursday, August 04, 2011 1:18 PM To: CCIE Security Maillist Subject: [OSL | CCIE_Security] Netflow On a router, the DestIf shows that Null is normal in circumstances when: * The packet is a broadcast or a multicast. * The packet does not match an ACL, and has been dropped. * The packet has been process switched. I could test all but second. How could I test this packet that does not match an ACL? -- Bruno Fagioli Cisco Security Professional -- Bruno Fagioli Cisco Security Professional
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