Cisco 10000-2P2-2DC Software Guide - Page 566
Verifying IP Options Handling: Example, Related Documentation, Feature
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Related Documentation Chapter 26 Protecting the Router from DoS Attacks Verifying IP Options Handling: Example The following sample output from the show ip traffic command indicates that the router received 2905 packets with IP options set. Because the ip options drop command is configured, the router drops all the packets with IP options, as indicated by the options denied counter. Router# show ip traffic IP statistics: Rcvd: 2905 total, 13 local destination 0 format errors, 0 checksum errors, 0 bad hop count 0 unknown protocol, 1 not a gateway 0 security failures, 0 bad options, 0 with options Opts: 0 end, 0 nop, 0 basic security, 0 loose source route 0 timestamp, 0 extended security, 0 record route 0 stream ID, 0 strict source route, 0 alert, 0 cipso, 0 ump 0 other Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble 0 fragmented, 0 couldn't fragment Bcast: 12 received, 3 sent Mcast: 0 received, 0 sent Sent: 3 generated, 0 forwarded Drop: 0 encapsulation failed, 0 unresolved, 0 no adjacency 0 no route, 0 unicast RPF, 0 forced drop, 0 unsupported-addr 3000 options denied, 0 source IP address zero Related Documentation This section provides additional Cisco documentation for the features discussed in this chapter. To display the documentation, click the document title or a section of the document highlighted in blue. When appropriate, paths to applicable sections are listed below the documentation title. Feature Denial of service (DoS) attacks Related Documentation Characterizing and Tracing Packet Floods Using Cisco Routers technical note 26-4 Cisco 10000 Series Router Software Configuration Guide OL-2226-23
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