Virtualization Expo on Ulitzer
If you haven’t yet downloaded the BIG-IP LTM VE trial, I highly suggest
you do. It is a fully-functional LTM, rate-limited to 1Mbps throughput.
If you’re not familiar with virtualized environments, hopefully this blog
will fill in some blanks for how to get started on the network front.
Before downloading your VE image, you need to choose what virtualization
environment you’re installing into. The supported options in the type 1
hypervisor are VMWare ESX version 4 and ESXi version 4. For the type 2
hypervisor (requiring a host OS such as linux or Microsoft Windows) the
supported option is VMWare Workstation 7, which offers a 30-day free trial
that I recommend you give a shot, or for those with experience on VMWare
player, that also will suffice if you are at version 3. Note, however, that
VMWare player is not supp... (more)
So I guess I’m on the even days plan here at Tech Ed, today being the
fourth and final day of Tech Ed… Yesterday I got the chance to walk
around the exhibitor hall and take a look at the exciting offerings on the
floor. Microsoft had three very large sections with breakout booths for all
their product offerings. I stopped and chatted with a few experts in the
Server 2008 R2 virtualization offerings, and watched a couple System Center
demos as well. Speaking of System Center, did you know F5 has a management
pack for System Center? I talked to several booth visitors yesterday... (more)
I got a request yesterday morning to asking if there was a way to drop HTTP
requests if a certain number was referenced in the Accept-Language header.
The user referenced this post on Exploring Binary.
The number, 2.2250738585072012e-308, causes the Java runtime and compiler to
go into an infinite loop when converting it to double-precision binary
floating-point. Not good. Twitter is ablaze on the issue, and there is a
good discussion thread on Hacker News as well. So how do you stop it?
At first, this appeared to be a no-brainer, just copy that string and drop if
found in that... (more)
DevCentral has many rock star contributors. Most are not affiliated
officially with F5 Networks, or DevCentral for that matter, but there are
several F5ers who believe in the community, and really believe in the F5
story. One of those F5ers is Matt Cauthorn, or as you know him in the
community, L4L7. You may recognize Matt as the author of pyControl. Well,
not only did he provide this entrance to a better iControl experience, he has
also delivered in a major way with his Vim plugin for editing iRules
(utilizing pyControl of course to make those calls to BIG-IP). I had toyed ... (more)
It's not an uncommon problem trying to figure out where to plant that sorry
page in the event your farm is down. It's also not an uncommon solution to
just use your BIG-IP to issue a text-only HTTP::respond. It works, but it's
not, how do you say, visually appealing? You want to say sorry and mean
it. With pictures. If you take a stroll through the iRules codeshare,
you'll notice several solutions to this problem. All of them work, with a
variety of methods, but user kirkbauer's entry takes it to another level.
Kirk's sorry page irule generator (written in perl) takes all ... (more)