Lab9 - Lab Report 9 Network management and security Due...

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Lab Report 9 Network management and security Due 17 th December 2015 [9 Pages] SNMP Exercises Exercise 1 Use pgrep snmpd to check if snmpd is started. Try to stop and then start the SNMP agent daemon using sudo /etc/init.d/snmpd start and sudo /etc/init.d/snmpd stop . With sudo vi , study the snmpd configuration file /etc/snmp/snmpd.conf . Also study the default configuration file /etc/snmp/snmpd.conf.save . This file is well commented. Read the comments and study the configuration options. Study the MIB files in the /var/lib/mibs/ietf directory. Examine the Interface MIB IF-MIB and the TCP MIB TCP-MIB to see the MIB objects and data types. Save these two files for the lab report. LAB REPORT : What is the data type for the MIB object ifMtu.2 ? The data type for the MIB object ifMtu.2 is integer32. What is the definition of the MIB object ifPhysAddress and ifInOctets ? The MIB object ifPhysAddress has the data type of string. It defines the interface's address at its protocol sub-layer. For interfaces which do not have such an address , it contains an octet string of zero length. The MIB object ifInOctets has the data type of Counter32. It defines the total number of octets received on the interface, including the framing characters.
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What is the data type and definition of tcpRtoAlgorithm ? tcpRtoAlgorithm has a data type of integer and it is used to determine the timeout value used for retransmitting unacknowledged octets. What values are allowed for tcpRtoAlgorithm ? The values used for tcpRtoAlgorithm are :- 1 : other, 2 : constant, 3 : rsre, 4 : vanj, 5 : rfc2988. What is the definition of tcpMaxConn ? tcpMaxConn defines t he limit on the total number of TCP connections the entity can support. Exercise 2 Use snmpwalk -v 2c -c guest localhost interface to display the Interface MIB. Use snmpwalk -v 2c -c guest localhost tcp to display the TCP MIB. You may run man snmpwalk to find out the meanings of the options used in the commands. Compare the outputs with the MIB files you saved in the previous exercise. Also compare the outputs of the first command with that of ifconfig -a . Retry the snmpwalk commands, but change guest to public . Can you display the MIBs this time?
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