Getting your physical switches to talk to virtual machines and GNS3 routers.
Thursday, December 6, 2012
Basics: Switches, VirtualBox and GNS3
Wednesday, October 24, 2012
Physical PC to Virtual PC
How I converted my old physical desktop running XP to a Virtual Machine…
Monday, August 27, 2012
Duplex Mismatch
Monday, August 20, 2012
BGP choosing longer AS_Path as preferred route...
The following network might look familiar if you’re going through the 642-902 book; and, if you are following the reading by configuring the examples in GNS3, you will find an omission which isn’t discussed until several sections later (that discussion does not clarify the problem as there is no mention of a problem with the example… but there is problem!)
Tuesday, August 14, 2012
no parser cache ...
I was configuring bgp earlier today and incorrectly entered an ip address in the neighbor statement… something like:
Wednesday, August 8, 2012
Redistribution with a Route Map
(or, how I forgot to remember to change the loopback network type and will remember to never forget in the future...)
The goal is to redistribute OSPF into EIGRP while preventing routes L1, L2, L4,& L6 in OSPF 50 Area 3 from being redistributed (these routes are configured as loopbacks on R3); All EIGRP routes are to be redistributed into OSPF.
Wednesday, August 1, 2012
Configuring SuperPuTTY for GNS3
Notes:
Host…………………….Win7 Pro
GNS3 version………….0.8.1
Putty.exe version………beta 0.62[ http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html ]
–note, you must have putty installed (i.e. the putty.exe file)
SuperPuTTY version….v1.2.0.11[ http://code.google.com/p/superputty/downloads/list ]
Sunday, May 27, 2012
OSPF router is not using the adjacent neighbors’ highest loopback as Neighbor ID
AKA, configuring the loopback after creating the OSPF process...
Thursday, May 10, 2012
Setting key chain time-based authentication for EIGRP in GNS3…
Notes:
My lifetime config on all routers:
R(config-keychain-key)# accept-lifetime 06:00:00 May 9 2012 infinite
R(config-keychain-key)# send-lifetime 06:00:00 May 9 2012 infinite
- GNS3 0.8.1
- VirtualBox 4.1.6
- Still using the same topology from ntp server post:
- Global config command clock save interval hours crashed the routers... so I'm not using this as a soloution.
Sunday, May 6, 2012
Setting a VirtualBox XP Machine as an NTP Server in GNS3
The following is how I set an xp vm to act as an ntp authoritative time server for a LAN within GNS3. This took some time and yes, I know that setting one of the routers as the ntp server is much easier to do… but where’s the fun in that? This is just something I was fooling around with and how I got it to work.
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