Network Lifecycle Management - anybody???
Justin M. Streiner
streiner at cluebyfour.org
Mon Dec 9 23:52:15 UTC 2013
On Mon, 9 Dec 2013, Stefan wrote:
> As $subj may infer, do you guys follow any type of network lifecycle in
> your environment? If so - what would be some criteria you would consider
You'll probably get lots of different answers to this question depending
on where people are working. The lifecycle criteria for an enterprise
can be very different from a service provider, .edu, K-12, etc.
> - risk reduction while replacing unsupported equipment
> - security issues associated with OS or appliances not supported
In my $dayjob environment, we generally try to have gear out of produciton
before it goes EOS/EOL. For things like closet switches, the main
driver is more about keeping current on security issues, since we often
have spare hardware to take care of things like chassis failures, etc.
For core gear, maintaining a vendor-supported setup is the main driver.
Other organizations might also have separate lifecycle plans for core vs.
non-core gear. Financially, the amount of capex/opex per device can make
a difference. A smaller number of core routers/switches might be expected
to have a longer service life (preferably extendable through module
upgrades before a forklift replacement is needed) and depreciation
schedule than a larger number of smaller access/edge switches, regardless
of the expenditure.
I generally don't want to forklift core gear more often than about 5-7
years, though business and technical realities might dictate otherwise.
> - business / apps demand for capacity or features (e.g. virtualization,
> SDN, etc.), laid out well in advance to allow for a 3-4-5 yrs plan with a
> consistent replacement rate of aging equipment
We've been doing this with things like wireless APs - replacing older ones
over time in addition to installing new ones to keep up with the demand
> - increased costs of support for aging equipment, or recertification for
> vendor support
> - anything else ... ???
As much as I hate to say it - politics does play a factor in many
environments. In the academic world, 'keeping up with the Joneses' has
certainly factored into some technology purchasing decisions. In other
"xyz.edu is deploying $blah. We need to deploy $blah, too."
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