Randy Presuhn <[email protected]> writes: > 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.
To be fair, there is no good solution to this in the current state of affairs either. The limiting factor is the document-oriented nature of YANG. It is a good use case for schema mount though. Lada > > Randy > > _______________________________________________ > netmod mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/netmod -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 _______________________________________________ netmod mailing list [email protected] https://www.ietf.org/mailman/listinfo/netmod
