Cisco ASA Firepower – TFTP %ERROR: Signature not valid for file disk0:/cisco-asa-fp2k.9.x.x.x.SPA
Short and simple. If you are running Firepower 2100 or 4100 on ASA image either stand alone or context mode you have to install new...
Cisco ASA Microsoft Updates Sources List – 2020 List
If you need to filter egress traffic on your ASA and one of the requirements is to have access to update.microsoft to pull all necessary...
FCoE VFC VSAN stuck at waiting for flogi / initializing – %PORT-5-IF_TRUNK_DOWN: %$VSAN 102%$ Interface vfc102, vsan 102 is down (waiting for flogi)
The most common issue that I see when trying to register vsan to flogi is the issue with association under vsan database. Its very easy...
Nexus Fabric Extender – ERROR: fcoe_mgr: Cannot bind the VFC as the Fex not fcoe configured (err_id 0x4207005B)
If you received this error when trying to associate VFC (Virtual Fiber Channel) there are two simple reasons: Your N2K FEX doesn’t support VFC –...
How to export and import SecureCRT Sessions
If you are like me who is heavily leveraging SSH terminal such as SecureCRT you are probably utilizing Session Manager....
Verifying limit-resource memory per VDC instance on N7K
Recently, I came across the situation where one of my DCI links started to flap after introduction of EIGRP. At the end it was the...
Discrepancy between interface labels on GNS3 client and NX-OS appliance physical connection
Recently, I had to spin up NX-OS topology for the project I’m working on but I’ve been failing miserable. Nothing wants to work, simple L2...
How to setup automatic session log on SecureCRT
Saving your session log is a must feature in my opinion. Not only for compliance/security reasons (with some companies) but it can save you (trust...
Cisco ASAv Smart Licensing Explained and Registration Process
With the realease of 9.3 for ASA’s Cisco introduced Smart Licensing where it lets you purchase and manage a pool of licenses centrally. Unlike product authorization key (PAK)...
How to improve your Hot Aisle and Cold Aisle approach in your Data Center
If you own a private or colocation (colo) Data Center you know that temperature is one of many enemies. Keeping your infrastructure properly cooled is...