Overview
This release note summarizes software behavior, supported platforms, supported images, known issues, and hardware compatibility for NX-OS Release 10.2(7)M on Nexus 9000 Series systems.
New and Enhanced Features
NX-OS Release 10.2(7)M does not introduce new or enhanced software features.
Hardware Capabilities
No new hardware functionality is introduced in this release. Supported optics, transceivers, and cabling combinations are defined in the applicable transceiver compatibility matrix.
Supported Software Images
The following 64-bit images are supported in NX-OS Release 10.2(7)M:
-
nxos64-cs.10.2.7.M.bin
Supported on fixed and modular switches using FM-E, FM-E2, and FM-G fabric modules. -
nxos64-msll.10.2.7.M.bin
Supported on modular systems with R and R2 series line cards.
The 32-bit image format is no longer supported.
Open Issues
The following issues are known to exist in NX-OS Release 10.2(7)M. Each entry includes the associated Bug ID.
-
CSCwh50989
Custom control plane policing (COPP) policies may cause transit traffic to be punted to the CPU on certain platforms. -
CSCwi30069
Spanning Tree Protocol (STP) process failures may occur after deleting and re-adding VLANs and VRFs in a specific sequence. -
CSCwi95405
VPC-attached multicast receivers may fail to subscribe to some multicast groups. -
CSCwi85825
The VSH.bin process may crash due to pushing a bulk prefix-list configuration without defining sequence numbers. -
CSCwi61143
Route-map configuration may default to sequence number 10 if no sequence is specified. -
CSCwf51439
VXLAN broadcast, unknown unicast, and multicast (BUM) traffic loops may occur when PIM BiDir and fabric peering are used together. -
CSCwi95861
Multicast traffic may be lost on mNAT/SR interfaces when output interfaces (OIFs) are changed in an NBM passive setup. -
CSCwi84480
VPC failure reasons may not be displayed after specific Port-channel configuration changes. -
CSCwi87506
Multicast (S,G) traffic may be dropped due to hitting an exception related to source-specific RPF checks. -
CSCwi99525
On the N2K-C2348TQ platform, HIFs may fail to utilize redundant Port-Channel links during link failover events.
Resolved Issues
The following issues have been resolved in NX-OS Release 10.2(7)M. Each resolved item includes its Bug ID.
-
CSCwb53265
Fixed an issue where Netconf could core during OSPF authentication merge operations. -
CSCwd89402
Resolved an issue where BFD authentication configuration was not displayed after upgrade while sessions remained operational. -
CSCwe55237
Fixed incorrect handling of overlapping IPv6 addresses with different subnet masks on Layer-3 interfaces. -
CSCwf34708
Resolved an issue where BFD sessions could remain down after an installation using the no-reload option. -
CSCwf52916
Fixed telemetry trace errors caused by oversized values. -
CSCwf57548
Corrected ICMP “fragmentation needed” behavior when NAT is configured.
Recommendation: use consistent MTU values on both interfaces. -
CSCwf72985
Fixed telemetry subscription issues for specific DME paths related to PTP correction. -
CSCwf74305
Resolved CLI performance degradation caused by excessive logging activity. -
CSCwf75437
Fixed an issue where static BFD routes could disappear after a system switchover on N9K-C9504.
Supported Platforms
NX-OS Release 10.2(7)M supports a broad range of Nexus 9000 Series hardware:
Modular Switches
Fixed and Modular Line Cards
Supported high-density line cards cover QSFP, QSFP28, and mixed-speed interfaces across R and R2 modular series.
Fixed-Configuration Systems
Fixed systems supporting 1G, 10G, 25G, 40G, 100G, and higher-speed interfaces are supported depending on platform and image.
Compatibility and Operational Notes
Upgrade and downgrade operations should follow the procedures defined in NX-OS software management guides. When downgrading from Release 10.2(7)M to an earlier release, licensed features may continue in honor mode but might not be fully supported.
Related documentation includes transceiver compatibility matrices, software upgrade and downgrade guidance, and licensing behavior references.
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