CH09-1 - CH9 NETWORK MANAGEMENT TOOLS SYSTEMS AND...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
CH9: NETWORK MANAGEMENT TOOLS, SYSTEMS, AND ENGINEERING Basic Network Software Tools Status monitoring tools Traffic monitoring tools Route monitoring tools Basic tools are available as Part of the Operating System Add-on applications Status Monitoring Tools Table 9.1 Status-Monitoring Tools 1. ifConfig Used to assign/read an address to/of an interface Option -a is to display all interfaces Example: Notice two interface loop-back (lo0) and Ethernet (hme0) 2. Ping Most basic tool for internet management Based on ICMP ECHO_REQUEST message Available on all TCP/IP stacks Useful for measuring connectivity Useful for measuring packet loss Can do autodiscovery of TCP/IP equipped stations on single segment pg. 1
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CH9: NETWORK MANAGEMENT TOOLS, SYSTEMS, AND ENGINEERING Example: % ping 205.152.8.138 PING 205.152.8.138 (205.152.8.138): 56 data bytes 64 bytes from 205.152.8.138: icmp_seq=0 ttl=17 time=14.8 ms 64 bytes from 205.152.8.138: icmp_seq=1 ttl=17 time=20.2 ms 64 bytes from 205.152.8.138: icmp_seq=2 ttl=17 time=15.7 ms 64 bytes from 205.152.8.138: icmp_seq=3 ttl=17 time=21.6 ms 64 bytes from 205.152.8.138: icmp_seq=4 ttl=17 time=20.0 ms --- 205.152.8.138 ping statistics --- 5 packets transmitted, 5 packets received, 0% packet loss round-trip min/avg/max = 14.8/18.4/21.6 ms Round-trip time (RTT) is the length of time it takes for a signal to be sent plus the length of time it takes for an acknowledgment of that signal to be received TTL is Time To Live 3. Nslookup An interactive program for querying Internet Domain Name System servers Converts a hostname into an IP address and vice versa querying DNS Useful to identify the subnet a host or node belongs to Lists contents of a domain, displaying DNS record Available with BSD UNIX; FTP from uunet.uu.net Available in Windows NT Example 4. Domain Name Groper: dig Used to gather lots of information on hosts from DNS Example [beluga]~> dig +nocomments nimbus.tenet.res.in nimbus.tenet.res.in. 604800 IN A 203.199.255.4 tenet.res.in. 604800 IN NS volcano.tenet.res.in. tenet.res.in. 604800 IN NS lantana.tenet.res.in. volcano.tenet.res.in. 604800 IN A 203.199.255.3 ;; Query time: 2 msec ;; SERVER: 203.199.255.3#53(203.199.255.3) pg. 2
Image of page 2
CH9: NETWORK MANAGEMENT TOOLS, SYSTEMS, AND ENGINEERING ;; WHEN: Fri Mar 6 14:12:43 2009 ;; MSG SIZE rcvd: 149 [beluga]~> Time To Live 604800 5. Host Command: host Displays host names using DNS It is normally used to convert names to IP addresses and vice versa Example % host -a sun4-gw.cc.gatech.edu Trying null domain rcode = 0 (Success), ancount=1 The following answer is not authoritative: sun4-gw.cc.gatech.edu 85851 IN A 130.207.111.100 Traffic Monitoring Tools Table 9.2 Traffic-Monitoring Tools Name Operating System Description
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern