ine recommends vendor neutral books first.
this lab is a sample from narbik’s new foundation book v5 which can be downloaded here… 90 pages of free labs…
this first lab was instructive in getting used to how narbik operates. his v5 books should be interesting. below is the topology i used in gns3 to accomplish this lab.
and here is the zipped .net and configs…
have at it…
written in python 2.7 may 26, 2014…
- 3.5.g [i] Types of families
- 3.5.g [ii] IPv4 address-family
- 3.5.g [iii] IPv6 address-family
piece of cake if you are familiar with address families…
R1(config)#do sh ver
Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 15.2(4)S, RELEASE SOFTWARE (fc1)
you’ll need a relatively new version of ios to support this
use a name instead of a number
R1(config)#router eigrp ?
<1-65535> Autonomous System
WORD EIGRP Virtual-Instance Name
R1(config)#router eigrp OZ
R1(config-router)#address-fam ipv4 autonomo 1
*Apr 26 14:55:15.199: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.12.2 (FastEthernet1/0) is up: new adjacency
older versions in address-family mode the autonomous system was configured on a separate line… now just put it on the same line with address-fam ipv4
use af-interface mode for interface specific commands:
topology base mode gives you the usual manipualation set:
Address Family Topology configuration commands:
auto-summary Enable automatic network number summarization
default Set a command to its defaults
default-information Control distribution of default information
default-metric Set metric of redistributed routes
distance Define an administrative distance
distribute-list Filter entries in eigrp updates
eigrp EIGRP specific commands
exit-af-topology Exit from Address Family Topology configuration mode
fast-reroute Configure Fast-Reroute
maximum-paths Forward packets over multiple paths
metric Modify metrics and parameters for advertisement
no Negate a command or set its defaults
offset-list Add or subtract offset from EIGRP metrics
redistribute Redistribute IPv4 routes from another routing protocol
snmp Modify snmp parameters
summary-metric Specify summary to apply metric/filtering
timers Adjust topology specific timers
traffic-share How to compute traffic share over alternate paths
variance Control load balancing variance
How To Calculate an Idle PC in 0.8.6
Historically, and often for new users of GNS3 this can be frustrating. However, in the last couple of releases this has become much more stable, reliable and effective. We will be covering two methods to accomplish this.
- Start GNS3 (optional but recommended; run as administrator) and drag a router or two to the workspace. Select the green start button to get it running.
- Start a performance monitoring tool as shown below.
Note the high cpu utilization. Selecting a good Idle PC value will remedy this.
- Right click on a router and select Idle PC from the drop down menu. This will issue a warning; click yes to calculate a new Idle PC value.
4. The GNS3 logo will come up on the screen while it is calculating the Idle PC value.
5. Once that is complete, you will be presented with drop down value choices, as below:
6. There should be a few choices for values in the drop down. If presented with a value that has an asterisk *, choose that one.
7. Your cpu utilization should drop significantly once an Idle PC value is selected. If not, repeat the process and select a different value.
Method 2 (Preferred)
- As in method 1, drag a router to the workspace, start it, then select Edit—IOS images and hypervisors.
- In the pop-up, Highlight the image you are calculating for and select auto calculation to the right of the empty Idle PC field.
3. Select Yes.
4. GNS3 will calculate the value. Select close.
5. Check performance with your performance monitor.
This How-To was performed on a notebook with a lower end Pentium B940 @ 2 GHz with only 4 G ram. Better results can be achieved with more ram and a stronger processor. However, it is safe to say with this latest release the folks at GNS3 have made substantial improvements. A third party program such as Process Lasso can also help with performance issues.
In the screenshot below there are 16 7200 routers operational.
Note that while the cpu is doing fine, ram is taking a big hit.