Wow, AIX does not like to make anything easy. Nor do they like to make things intuitive. Need to remove a route from AIX, well get ready to have one command to temporariliy remove a route and another command to remove the route for good. Same goes with adding a route. "Quit your bitching, and use Smitty", you say? Well smitty does not make anythign any easier, especially since the UI likes to show you fields that you does not necessarily need you to use. Oh, plus they let you type in them. Asking me for a netmask when adding a static route does not seem like a crazy request to me? But jokes on you, you were not supposed to type anything there.
network
Cisco: Principles of Application Centric Infrastructure
Attending Cisco Live 2014 in San Francisco this week?
Well, get ready to hear a lot about ACI (Application Centric Infrastructure). It's almost here and its everywhere. And the acronyms, holy crap, get ready to get hit upside the head with of ton of those that you have never heard before. Cisco is only a close second to VMware when it comes to their love of acronyms.
HomeLab: Simple Cisco EIGRP Setup
EIGRP (Enhanced Interior Gateway Routing Protocol), is a Cisco proprietary routing protocol (until recently). When a router runs EIGRP, it keeps a copy of its neighbors routing table. If I router cannot find a route it its, or its neighbor's routing table, it will query its neighbors who in turn query their neighbors.
Exactly how routing protocols work is serious business, but dont worry we are not going to go into that here. Below is the process that I used to setup EIGRP on a Cisco 2811.
HomeLab: The Cisco 3560G
The Cisco Catalyst 3506G is a layer 3 switch which went end-of-life in 2009. For the home lab its a pretty nice switch to have due to its layer 3 support and gigabit speed. Mine is the model seen to the left, 24 gigabit ports and 4x1gb SFP uplinks. The Cisco Catalyst 3560 is … Continue reading HomeLab: The Cisco 3560G
Broadcom (bnx2) Network Adapters Dropping Recieved Packets Under Linux
VampSo a few weeks ago some of our Centos 5.4 and OEL 5.5 servers started exibiting strange connectivity problems. Monitoring started alerting that hosts were down when they weren't; some boxes could ping target hosts and some couldn't; some boxes became unresponsive when interfaces were failed over, and the strangest of all is that some of the boxes would magically "repair" themselves. Like I said, strange.
XenServer Switch Ports Configuration Best Practices
Finally I have found it! Citrix's XenServer switch configuration best practices document.
While everyone in the world has blog posts and documentation regarding how to set up and configure bridged networks in Xen, they hardly ever go into the physical switch configuration required.
This is the document that you will need to pass along to your friendly Network Administrator, as they will more than likely not be familar with networking for Xen as its much different from networking for Vmware ESX.
How to Create A Dedicated Storage NIC in XenServer
In Vmware ESX, when using NFS storage, you are required to create a separate and additional vmkernel portgroup to access your NFS storage. This way ESX Management traffic travels over one port group and NFS traffic travels over another.
In Xenserver the concept is similar; however executed much differently.