Hello Randy,
I agree that the problem can not be eliminated, however it is still a
nasty problem which we should try to avoid whenever possible. So if we
can avoid it 75% of the time I am happy. (I don't often _configure_
firmware, so I am less worried about that :-) )
regards Balazs
On 2017-11-16 03:07, Randy Presuhn wrote:
Hi -
On 11/15/2017 2:02 AM, Balazs Lengyel wrote:
While a server may correctly support multiple versions, the human
operator on the CLI has a 99% chance of mixing up which version he is
using. Humans will not check every type and leaf to check that they
remember the little differences between model versions. It is a
recipe for human mistakes. According to some statistics 50% of
downtime is caused by human errors, so we should not provide the
operator with a gun to shoot himself. Ericsson has a rule never to
have multiple versions of the same module on a network node.
Does this mean that they require all line cards in a chassis to have
exactly the same firmware revision level? If so, when a card with a
newer firmware revision level is swapped in, does that require all other
cards of the same type in that chassis to also be replaced concurrently?
Sounds like even a fairly routine/minor update/repair would effectively
result in a system outage.
Randy
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Balazs Lengyel Ericsson Hungary Ltd.
Senior Specialist
Mobile: +36-70-330-7909 email: [email protected]
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