Given that Standard Maintenance Releases have much shorter support lifetimes whereas Extended Maintenance releases have longer support with more scheduled rebuilds/bug fixes, it is recommended that you stay on Extended Maintenance releases wherever possible. Note: Every subsequent third release (for example, Cisco IOS XE Software release 16.9, 16.12, 17.3, and 17.6) are an Extended Maintenance release. ![]() Examples are Cisco IOS XE Software releases 16.9, 16.12, 17.3, and 17.6 Examples are Cisco IOS XE Software releases 16.11, 17.1, 17.2, 17.4, 17.5, 17.7 and 17.8Įxtended Maintenance Release (EMR) - A sustaining support lifetime of 36 months from First Customer Shipment (FCS) with scheduled rebuilds. Standard Maintenance Release (SMR) - A sustaining support lifetime of 12 months from First Customer Shipment (FCS) with scheduled rebuilds.
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