AI, ML, Development + Cisco Learning Blog Learning about Machine Learning, Artificial Intelligence, related devlopment topics and formerly Routing and Switching, Datacenter, Security and other topics, CCIE #23664, Frank Wagner

Just got a hint from a study college about these lectures, which are free and also interesting to have a look at. If you have the flash player installed and maybe sometimes like learning by watching Scott Morris or Marvin Greenlee explaining the following topics, then this is the right thing for you:

• CCIE Voice Related Topics
  • SRST
  • Unity
    
  • H323 Gatekeeper Basics
  • IPMA
  • WAN QoS
  • Digit Manipulation on CallManager 4.1(3) & CME 3.3
  • Troubleshooting in the CCIE Lab
  • Advanced Call Routing
  • Unity, Unity Express, & VPIM
  • Basic-ACD: Part 1, Part 2
  • Campus QOS
• CCIE Security Related Topics
  • DMVPN
  • Binary Math: Subnetting / access-lists
• CCIE Service Provider Related Topics
  • ATM Operations and Configuration

Source:

http://www.ipexpert.com/index.cfm/a/p/vlectures

Use telnet to debug certain policies and look if traffic is matching. There is the /source-interface option for that.

To controll which source interface telnet is using, you can set it up with /source-interface.

It’s also possbile to generate certain traffic with the rtr command:

R1(config)#rtr 2
R1(config-rtr)#type ?
dhcp DHCP Operation
dlsw DLSW Operation
dns DNS Query Operation
echo Echo Operation
frame-relay Perform frame relay operation
ftp FTP Operation
http HTTP Operation
jitter Jitter Operation
pathEcho Path Discovered Echo Operation
pathJitter Path Discovered Jitter Operation
slm SLM Operation
tcpConnect TCP Connect Operation
udpEcho UDP Echo Operation

R1(config-rtr)#type tcpConnect dest-ipaddr 10.10.10.10 ?
dest-port Destination Port

R1(config-rtr)#type tcpConnect dest-ipaddr 10.10.10.10 dest-port 80 ?
control Enable or Disable Control packets
source-ipaddr Source Address
source-port Source Port
R1(config-rtr)#rtr schedule 2 life 600 start-time now
Or „ip sla monitor“ is available to generate traffic also.

Source:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hsla_r/sla_01h.htm#wp1077817

Some scripts are very usefull to test full reachability within routers and switches. On most routers there is a tclsh available and you can use is like this:

R1#tclsh
R1(tcl)#

foreach i {
150.1.8.8
150.1.7.7
150.1.5.5
150.1.4.4
150.1.3.3
150.1.2.2
150.1.1.1
} { puts [ exec „ping $i“ ] }

And then you can just copy and paste in your addresses. On some routers tclsh is not available. There you can use a ping macro:

SW1(config)#macro name PING
Enter macro commands one per line. End with the character ‚@‘.
do ping 150.1.1.1
do ping 150.1.2.2
do ping 150.1.3.3
do ping 150.1.4.4
do ping 150.1.5.5
do ping 150.1.7.7
do ping 150.1.8.8
@

SW1(config)#macro global apply PING
The last command executes the script. With this you can start pinging all your routers.

about the CCIE lab.

Check out:
http://www.sureshhomepage.com/ccie/index.html

A good source of information are RFC’s (Request for Comments). You can find definitions at this FTP address:

ftp://ftp.rfc-editor.org/in-notes/

If you want to remove all empty lines from a config file, you can use sed on unix system. Use with the regular expression:

sed ‚/^$/d/‘ config-file > new-file

Source:

http://www.cornerstonemag.com/sed/

It’s quite easy that you can load a configurations into your router. You can for example load the config over TFTP oder you can just copy the config with copy and paste from another terminal.

It’s neccessary that you go into „conf t“ mode.

So if you then just put your configuration from the textfile in your editor into your clipboard, then you can copy it into your terminalwindow and you will see that all commands are set in a row. After this your device is configured.

It’s also possible to load the configuration over TFTP. Of course you need an TFTP Server. Search google to find one, matching your operating system.

Then you can copy a configuration file from the TFTP server directly into mem of the device and into running-config. It looks like:

copy tftp running-config

or for example to

copy tftp nvram:startup-config

to overwrite the startup configuration.

You can list available local configs with:

dir nvram:

As a result you could see:

Router#dir nvram:
Directory of nvram:/

29 -rw- 1410 startup-config
30 —- 5 private-config
1 -rw- 0 ifIndex-table

32762 bytes total (30273 bytes free)
Router#

You might have problems with hyperterminal and copy and paste also. It could be possbile to set the charcter dely from 10ms to 200ms. This could work with swollowed characters.