About Ron Staples

Ron has been working in the data, voice technologies field for over 15 years, he obtain his CCNA in 1999 and has worked for several fortune 500 companies. Since then he has re certified his CCNA and earned the following additional certifications, CCNA Voice and CCRMS.

SecurCRT and GNS3 terminal setting

I’ve used GNS# for a number of years, one thing that I notice is the error in the terminal settings for SecureCRT.  Granted, GNS3 does come with putty installed however I’v been  fan of SecureCRT since 2008.  This video will help you make the necessary changes  needed to allow ScureCRT 64 and 32 bit to work with GNS3. If you find the below video a bit blurry, go to YouTube and view it at 720 HD in full screen.  Looks great. http://youtu.be/-dmrTneMGhA?hd=1

Here’s the correct code for SecureCRT 64bit.

C:\progra~1\vandyk~1\SecureCRT\SecureCRT.EXE /script C:\progra~2\gns3\securecrt.vbs /arg %d /T /telnet %h %p

Use this for the  32bit version

C:\progra~2\vandyk~1\SecureCRT\SecureCRT.EXE /script C:\progra~2\gns3\securecrt.vbs /arg %d /T /telnet %h %

DOS commands for Network Engineers.

Link

  • To see the system information: systeminfo
  • Display Connection Configuration: ipconfig /all
  • Display DNS Cache Info Configuration: ipconfig /displaydns
  • Clear DNS Cache: ipconfig /flushdns
  • Release All IP Address Connections: ipconfig /release
  • Renew All IP Address Connections: ipconfig /renew
  • Re-Register the DNS connections: ipconfig /registerdns
  • Change/Modify DHCP Class ID: ipconfig /setclassid
  • Network Connections: control netconnections
  • Test Connectivity: ping supto.net
  • Displays the TCP/IP protocol sessions: netstat
  • Display Local Route: route
  • Display Resolved MAC Addresses: arp
  • Display Name of Computer Currently on: hostname
  • Display DHCP Class Information: ipconfig /showclassid
  • Name Server Lookup: nslookup google.com
  • Access and maintain a Microsoft File/Printer Sharing environment: net
  • For Traces the route: tracert supto.net  (press ctrl+break to came out of this command)
  • Combines functions of Ping and Tracert : pathping /?
  • Used to retrieve the information about a user on a network: finger

MPLS Circuit Troubleshooting

Link

In this scenario we are asked to validate a flapping interface.  

1] Find the serial interface and verify that it is up/up

 attga43c3#sho ip int br | include 10.112.210.45

 Serial9/1/1/20:0       10.112.210.45   YES manual up

2] Display the interface and note the errors

    attga43c3#sho int s9/1/1/20:0

        Serial9/1/1/20:0 is up, line protocol is up
          Hardware is cyBus 2CT3+
          Description: MNX | MYHOME SERVICES | MYHOUSE | GA | DHEC.123456..ATI | 23853 | 1305937 | 1364629 | USA | MIS |
          Internet address is 10.112.210.45/30
          MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, rely 255/255, load 1/255
          Encapsulation PPP, crc 16, loopback not set
          Keepalive set (10 sec)
          LCP Open
          Listen: CDPCP
          Open: IPCP
          Last input 00:00:05, output 00:00:05, output hang never
          Last clearing of “show interface” counters never
          Input queue: 0/1000/0/0 (size/max/drops/flushes); Total output drops: 5
          Queueing strategy: VIP-based fair queuing
          5 minute input rate 0 bits/sec, 0 packets/sec
          5 minute output rate 0 bits/sec, 0 packets/sec
             6534487 packets input, 3035189030 bytes, 0 no buffer
             Received 0 broadcasts, 0 runts, 1 giants, 0 throttles
             116987 input errors, 7228 CRC, 51274 frame, 0 overrun, 0 ignored, 58484 abort
             5877595 packets output, 2144676741 bytes, 0 underruns
             0 output errors, 0 collisions, 170 interface resets
             0 output buffer failures, 0 output buffers swapped out
             166 carrier transitions no alarm present
          Timeslot(s) Used: 1-24, Transmitter delay is 0 flags, transmit queue length 5
          non-inverted data

3] Find the VRF and ping the VRF interface.

    attga43c3#sho ip vrf interface | include 10.112.210.45

        Serial9/1/1/20:0       12.112.210.45   1612 <— VRF

4] Run an extended Ping to the VRF

    Router3#ping vrf 1612   

        Protocol [ip]:
        Target IP address: 10.112.210.46
        Repeat count [5]: 5000
        Datagram size [100]: 1500
        Timeout in seconds [2]: 1
        Extended commands [n]:
        Sweep range of sizes [n]:
        Type escape sequence to abort.
        Sending 5000, 1500-byte ICMP Echos to 10.112.210.46, timeout is 1 seconds:
        !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

In the above ping I wanted to really hammer the heck out of circuit.  In this example we see that the circuit is clocking massive input errors and  no output. Instead of me writing what I did to correct this, I’m going to leave this post open for the reader to comment what they think I did.  Note the bold errors and circuit type.

Inactivity news

At the helm

Just a short note to you all know what has been happening for the last three months and why there hasn’t been any new content posted to the site.

It’s been a busy  three months , took the ROUTE exam , work projects then changing job roles.

I recently picked up the CCIE Routing and Switching Certification Guide, (4th edition).  SO I will be pouring of that soon.

I have about a donzen GNS labs that I want to add to the site along with my commentary, problems I had with GNS3 and issues I ran into to make them work.

I be writing up my own guide on how to setup GNS3 for the Mac Pro using Lion OS and lastly I plan to the move the site theme to a Thesis theme, been playing around with this of and on for the last month or so.  So far I think it will allow allot more flexibility to how I can display content on the site.

This is what I have plan for August, by then the dust in the new office will be settled and I can start adding more content to the site.

-Ron

 

How to save your PuTTY settings

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PuTTY does not write its settings to a file, for people who wish to install this on an USB stick poses a challenge.  When you run putty on a system that never ran it before, it will  not have any of your saved settings.    Only solution (that i know of) is to merged your registry settings with the system you running it on. (a bit intrusive.)  So in just seven easy steps you can now have your PuTTY settings on your USB drive.

Step 1

image

From your Windows start panel, click on “run”

 

 

 

Step 2

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Type “regedit” in the your run box.

 

 

 

Step 3

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Press “CTRL-F” (this will bring up the search box)
In the search box type “SimonTatham” (no space)
Click off Values and Data
Press Enter

 

Step 4

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You should now have the SimonTatham highlighted in your registry

 

 

 

 

 

 

 

Step 5

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Right click and select “Export”

 

 

 

 

 

Step 6

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I saved mine to the desktop and named it something that I would not forget what it it.

 

 

Step 7

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Once you have the file you can move it to your USB key and import or merge
it to which ever system you are working on.

That’s it, you’re done!

Cisco to Juniper command reference sheet.

I found this sheet on the internet a few years back.  If anyone knows the URL send it to me and I’ll link it. The sheet as help me perform some basic troubleshooting on the Juniper J2300 in our lab. The 2300 came with an elaborate GUI interface however I more comfortable diving knee deep into the CLI.

 

 

 

Cisco Command Juniper Command What does it do?
show run sh configuration Show running configuration
show version show version Show version
show IP interface brief show interface terse displays the status of interfaces configured for IP
show interface # show interfaces # detail displays the interface configuration, status and statistics.
show controller # show interfaces # extensive displays information about a physical port device
show interface | incl (proto|Desc) show interfaces description displays the interface configuration, status and statistics
show IP route show route displays summary information about entries in the routing table
show IP BGP summary show BGP summary displays the status of all Border Gateway Protocol (BGP) connections
show IP BGP net mask show route protocol BGP prefix will show you how that route is being advertised, look for the first line
show IP BGP net mask longer-prefixes show route range prefix will show you how that route is being advertised, look for the first line
show IP BGP regexp AS-regexp show route aspath-regexp “AS-regexp” displays routes matching the autonomous system (AS) path regular expression
show IP BGP neighbors neigh received-routes show route receive-protocol BGP neigh
show route source-gateway neigh protocol BGP
Shows whether a neighbor supports the route refresh capability
show IP BGP neighbor neigh advertised-routes show route advertising-protocol BGP neigh Shows whether a neighbor supports the route refresh capability
show clns neighbors show ISIS adjacency displays both ES and IS neighbors
show clns interface show ISIS interface shows specific information about each interface
show IP route ISIS show ISIS routes displays the current state of the the routing table
show ISIS topology show ISIS spf displays a list of all connected routers in all areas
show IP OSPF interface show OSPF neighbor shows neighbor ID, Priority, IP, & State if the neighbor router, dead time.
show IP OSPF interface show OSPF interface shows neighbor id, prior, state, dead time, address and interface
show IP route OSPF show OSPF route display the current state of the routing table
show IP OSPF database show OSPF database display list of information related to the OSPF database for a specific communication server
show version show version, show system uptime display the system hardware config., software version, and name and source of configuration files and boot images
show diags show chasis hardware displays power-on diagnostics status
show processes cpu show system process displays utilization statistics
show tech-support request support info displays the current software image, configuration, controllers, counters, stacks, interfaces, memory and buffers
show logging show log messages display the state of logging to the syslog
show route-map name show policy name displayall route-maps configured or only the one specified
show IP prefix-list name show policy name display information about a prefix list or prefix list entries
show IP community-list list configure,
show policy-options community name
display routes that are permitted by BGP community list
show environment all show chassis  environment displays temperature and voltage information on the console
ping dest ping dest rapid (for cisco like output)
ping dest (for unix like output)
to check to see if a destination is alive
ping (setting source int) ping dest bypass-routing to check to see if a destination is alive
terminal monitor monitor start messages Change console terminal settings
terminal no monitor monitor stop Change console terminal settings
terminal length 0 set cli screen-length 0 sets the length for displaying command output
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IPV6, a 1,000 foot view

  • Has full time IPSEC
  • Eliminates the need for broadcast.
  • Uses UNICAST (one to one)
  • Uses MULTICAST FF01: (one to many)
  • Uses ANYCAST (one to closest)
    • Eliminates the need for HSRP/VRRP
  • NAT is not longer used
  • No more private addresses (the old v6 unique site local address is eliminated)
  • Uses Global scope address 2000::/3 (internet2 address 2001::/16)
  • Uses Link Local FE80: layer 2 auto generated
    • Think 169.254.0.0
  • (MAC – FFFE – MAC) = last 64 bits (48 bit MAC Address + 16 bit FFEE IPV6 )
  • Smaller Harder size ( more secure)
  • No need for a DHCP (uses auto generated prefix from the router)
  • Easier localhost address ::1 oppose to V4’s 127.0.0.1
  • IPv6 has eight blocks of 16 bits for a total of 128 (called hextets)

IPV4 RFC 791, September 1981 http://tools.ietf.org/pdf/rfc791.pdf
IPV6 Original RFC 1884, December 1995 (Now obsolete) http://tools.ietf.org/pdf/rfc1884.pdf
Revised July 1998 RFC 2373 (Now obsolete) http://tools.ietf.org/pdf/rfc2373.pdf
Revised April 2003 RFC 3513 (Now obsolete) http://tools.ietf.org/pdf/rfc3513.pdf
Current RFC 4291, February 2006 RFC 4291 http://tools.ietf.org/pdf/rfc4291.pdf

V 4’s 4.2 billion address pales in comparison to what V6 offers.
V6 has 340,282,366,920,938,463,463,374,607,431,768,211,456 available numbers

Three hundred and forty undecillion, two hundred and eighty-two decillion, three hundred and sixty-six nonillion, nine hundred and twenty octillion, nine hundred and thirty-eight septillion, four hundred and sixty-three sextillion, four hundred and sixty-three quintillion, three hundred and seventy-four quadrillion, six hundred and seven trillion, four hundred and thirty-one billion, seven hundred and sixty-eight million, two hundred and eleven thousand, four hundred and fifty-six.

http://www.thefreedictionary.com/undecillion < hear the pronunciation here.

Pasted from <http://itknowledgeexchange.techtarget.com/whatis/ipv6-addresses-how-many-is-that-in-numbers/>

The above is meant as a reference, information is not static.

My MPLS Cheat Sheet.

Link

Below is a list of troubleshooting commands I comprised over the years while working for a “major telecommunications internet provider”. The commands helped me to easily isolate most MPLS issues that I came across.

show ip vrf interfaces | i <IP>
show run | run vrf <NUMBER>
show ip route vrf <NUMBER>
show ip bgp vpnv4 vrf <NUMBER>
show ip bgp vpnv4 vrf <NUMBER> summary
show ip bgp vpnv4 vrf <NUMBER> neigh <IP> policy
show ip bgp vpnv4 vrf <NUMBER> neighbor < IP> route
show ip bgp vpnv4 vrf <NUMBER> neighbor <IP> advertised-routes
show ip bgp vpnv4 vrf <NUMBER> neighbor <IP> advertised-routes | i <NETWORK IP>
show ip route vrf <NUMBER> < IP>
show ip b v v <NUMBER> <IP>
tr vrf <NUMBER> <IP>
ping vrf <NUMBER> <IP>

edited: 2011-05-01

Task Manager’s Tiny foot print mode.

Have you ever ran into this?  Or even seen it?  Windows XP Task Manager has a mode called “Tiny footprint” MS Support Page

The mode is meant to allow people who want to, display their CPU meter.   this comes in handy when running six or more routers in GNS3,  you want to make sure that your CPU is not being pegged.

Normal Task Manager Windowimage

To the left we have our normal task manager window.  If you were to double click any where on the boarder the task manager will change to the image on the right What happens is by double clicking the boarder causes the menu tabs to disappear.   When I first saw this I thought something was wrong with my windows.  I even rebooted my computer but before panicked further I went researched it on

As you can see, it makes it very easy to keep eye on your processors.

Microsoft’s Website.  You can still navigate the menus by holding <TAB> + <SHIFT> and selecting “< or >“  your arrows keys. If you never seen this before it can be nerve wracking.