I wanted to bring these free tools to my blog to keep track of them, as most probably I will forget about, and to share with anybody interested in gathering information in the security areas.
Smartport macros are not more than some templates you can define on Cisco switches that will apply the same configuration on multiple ports. It’s not a subject that needs too many discussions, but it can be useful for your Cisco certification preparation or real life Cisco switch administration.
This is more a topic for exams, like Cisco CCIE, but also it can appear in real-world environments.
SW1 is the spanning-tree root bridge for all VLANs. Imagine that you have a request which ask you that when a port becomes active, no matter of VLAN, it should wait 10 seconds until it transition to forwarding state.
We have one Customer with two distributed locations (SW1, R1 and SW2, R2) connected over Provider backbone. What we want to create is something like this:
If Provider support 802.1q and L2 tunneling we can achieve a nice Etherchannel between our 2 remote locations with direct CDP visibility. Also STP and VTP is supported, just like when these SW1 and SW2 switches are directly connected.
Lately I’m playing a lot with virtualization features and for this I needed a rapid way to deploy from scratch new instances. First I had the virtual machines converted to templates, but then I had to rebuild from zero the entire ESXi environment and those images were gone.
Today I wanted to try and see how many IPv4 prefixes can a Cisco 2600 accommodate in BGP table both global and in VRF table. I have lying around a Cisco 2621XM with 64MB of RAM, so I said to stress it a bit like in the old days when it was productive.
I already explained in an older post my home lab for CCIE preparation. My BB1-BB3 routers are Cisco 2600 series and the rest of R1-R6 are emulated with Dynamips. The only problem is that one of the C2600 has too little Flash space to hold the required IOS. Memory is sufficient, but Flash not.
Imagine that you have two or more sites which you want to connect together using MPLS technology. You cannot afford dark fiber and your Service Provider cannot offer you L2 connections of any kind. The only thing your SP can offer is L3 transport. Still, you want to build your own MPLS environment and there is no way to convince your SP to enable CsC.
A few days ago I installed two additional NICs in my server that handle the virtual machine for vCenter Server Appliance (vCSA).
After the NICs installation, the Management web interface for vCSA was showing some strange error (see image below).