Nexus 9000 Series,NX‑OS 10.3(6)M

Overview

NX‑OS Release 10.3(6)M is a maintenance update for Nexus 9000 Series software. It does not introduce new software or hardware features and continues support for 64‑bit images. 32‑bit images are no longer supported.

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Notes

• No new software features are added.

• No new hardware features are included.

• Supported optics and transceivers are defined in standard compatibility guides.

• Known conditions from prior 10.3.x releases may still apply depending on platform and configuration.

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Supported Software Images

• nxos64-cs.10.3.6.M.bin — Supported on Nexus 9000 Series fixed and modular switches.

• nxos64-msll.10.3.6.M.bin — Supported on modular systems with R-series and R2-series line cards.

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Known Conditions

• CSCwj84211 — Front port on N9K‑C9348GC‑FXP may not receive traffic in RX direction.

• CSCwj95850 — Ingress drops all packets with a bad preamble tag on N9K‑C9348GC‑FXP.

• CSCwk35857 — Traffic may be blackholed after module or chassis reload on certain line cards with custom MAC configuration.

• CSCwk48494 — Internal failure errors when creating police circuits in class-map configuration.

• CSCwk76266 — IGMP proxy reports may not be generated for L2TRM.

• CSCwk76333 — Delayed physical port down events during admin shutdown can interrupt traffic on some ports.

• CSCwk77692 — Continuous alarms and warnings on specific ports of N9K‑C9348GC‑FXP.

• CSCwk78006 — (S,G) multicast entries created without proper source tree transitions.

• CSCwk80733 — Fibre interfaces may not come up on N9K‑C93216TC‑FX2 with this release.

• CSCwj28749 — All traffic stops when a 2.5G/5G speed port is oversubscribed.

• CSCwj69012 — DHCP Discover packets may be dropped with specific control plane policies on L2-only devices.

• CSCwj62619 — Disabling spanning-tree FCoE behavior on some devices.

• Additional conditions exist affecting VXLAN, BGP, PBR, ACLs, CPU, and telemetry behaviors.

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Supported Platforms

Modular Switches

• N9K‑C9408

• N9K‑C9808

• N9K‑C9504

• N9K‑C9508

• N9K‑C9516

Line Cards and Fabric Modules

• N9K‑X9788TC‑FX

• N9K‑X9716D‑GX

• N9K‑X9736C‑FX

• N9K‑X9624D‑R2

Supervisor and Controller Modules

• N9K‑SUP‑A

• N9K‑SUP‑B

• N9K‑SC‑A

Fans, Accessories, and Power Supplies

• N9K‑C9504‑FAN

• N9K‑C9508‑FAN2

• N9K‑PAC‑3000W‑B

• N9K‑PUV2‑3000W‑B

Fixed Switch Platforms

• N9K‑C9316D‑GX

• N9K‑C9364C‑GX

• N9K‑C93600CD‑GX

• N9K‑C93240YC‑FX2

• N9K‑C93360YC‑FX2

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Compatibility and Operational Notes

Software upgrades and downgrades should follow NX‑OS procedures. Licensed features may remain in honor mode after downgrade, though full support may vary with earlier releases. Verify optics, transceivers, and cabling before applying updates.

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