Lab 63 Solution: Debugging Network Traffic Using Extended ACLs

Task 1:

For reference information on configuring hostnames, please refer to:

Lab 35 Configuration and Verification Task 1

Task 2:

For reference information on configuring DCE clocking, please refer to:

Lab 57 Configuration and Verification Task 2

Lab 58 Configuration and Verification Task 2

Task 3:

R1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#access-list 111 remark ‘Permit all ICMP traffic’

R1(config)#access-list 111 permit icmp any any

R1(config)#end

R1#

Task 4:

R1#debug ip packet 111 detail

IP packet debugging is on (detailed) for access list 111

R1#

Task 5:

R1#ping 172.16.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/8 ms

R1#

*Mar  1 01:10:16.600: IP: tableid=0, s=172.16.1.1 (local), d=172.16.1.2 (Serial0/0), routed       via FIB

*Mar  1 01:10:16.600: IP: s=172.16.1.1 (local), d=172.16.1.2 (Serial0/0), len 100, sending

*Mar  1 01:10:16.604:     ICMP type=8, code=0

*Mar  1 01:10:16.608: IP: tableid=0, s=172.16.1.2 (Serial0/0), d=172.16.1.1 (Serial0/0), routed via RIB

*Mar  1 01:10:16.608: IP: s=172.16.1.2 (Serial0/0), d=172.16.1.1 (Serial0/0), len 100, rcvd 3

*Mar  1 01:10:16.608:     ICMP type=0, code=0

*Mar  1 01:10:16.608: IP: tableid=0, s=172.16.1.1 (local), d=172.16.1.2 (Serial0/0), routed via FIB

*Mar  1 01:10:16.608: IP: s=172.16.1.1 (local), d=172.16.1.2 (Serial0/0), len 100, sending

*Mar  1 01:10:16.612:     ICMP type=8, code=0

*Mar  1 01:10:16.616: IP: tableid=0, s=172.16.1.2 (Serial0/0), d=172.16.1.1 (Serial0/0), routed via RIB

*Mar  1 01:10:16.616: IP: s=172.16.1.2 (Serial0/0), d=172.16.1.1 (Serial0/0), len 100, rcvd 3

*Mar  1 01:10:16.616:     ICMP type=0, code=0

R1#undebug all

All possible debugging has been turned off

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