Overview
NX‑OS Release 9.3(7) provides software updates for Nexus 9000 Series switches running in NX‑OS mode.
This release focuses on enhanced features, new hardware support, open issues (known limitations), and resolved issues.
New and Enhanced Software Features
NETCONF Enhancements
- Support for a new NETCONF RPC, get_diff, which enables retrieval of configuration differences between the candidate and running datastore.
Thousand Eyes Integration
- Support for Thousand Eyes (TE) integration, enabling network performance visibility when used with Nexus 9000 Series switches.
SNMP and Security Enhancements
- SNMPv3 encryption with HMAC‑SHA‑256 authentication added for SNMPv3 communication.
- MACsec with QSA support extended on selected platforms, allowing MACsec encryption when QSA is enabled.
Layer 2 and FEX Support
- Flex Link support added for select fixed platforms.
- FEX support added on Nexus 93180YC‑FX3S, enabling Fabric Extender connectivity.
Supported Hardware
Fixed Switch Platforms
| Product ID | Description |
|---|---|
| N9K-C93180YC-FX3S | 48×1/10/25G + 6×40/100G fixed switch |
| N9K-C93180YC-FX | 48×1/10/25G + 6×40/100G fixed switch |
| N9K-C93180YC-EX | Enhanced fixed switch |
| N9K-C9332C | 32×40/100G + 2×1/10G fixed switch |
| N9K-C9336C-FX2 | 36×40/100G fixed switch |
| N9K-C9364C-GX | 64×40/100G fixed switch |
| N9K-C93600CD-GX | 60×40/100G fixed switch |
| N9K-C94160YC-X | 48×10/25G + 6×40G fixed switch |
| N9K-C94328C | 28×100G fixed switch |
| N9K-C9436C | 36×100G fixed switch |
Modular Switch Platforms
| Product ID | Description |
|---|---|
| N9K-C9504 | Modular chassis with up to 4 line cards |
| N9K-C9508 | Modular chassis with up to 8 line cards |
| N9K-C9516 | Modular chassis with up to 16 line cards |
Line Cards
| Product ID | Description |
|---|---|
| N9K-X9736C-FX | 36×40/100G QSFP28 line card |
| N9K-X9732C-FX | 32×40/100G QSFP28 line card |
| N9K-X9732C-EX | Enhanced 32×40/100G QSFP28 |
| N9K-X9636C-R | 36×40/100G R‑Series line card |
| N9K-X9636C-RX | Enhanced R‑Series 36×40/100G |
| N9K-X9636Q-R | 36×40G R‑Series QSFP |
Open Issues
| Issue | Description |
|---|---|
| Unsupported TCAM region config | TCAM region config entries remain in running-config after ISSU upgrade and cannot be removed without write erase and reload. |
| RJ‑45 port issue after ISSU | no negotiate auto removed from member interfaces but not from port-channel; requires manual workaround. |
| 1G GLC‑TE port stays down | 1G GLC‑TE port on certain fixed switches fails to come up without shutdown/no shutdown. |
| SNMP Crash after ISSU | SNMP process may crash during ISSU upgrade, aborting the upgrade. |
| SMU commitment after reload | Multiple SMUs may not remain committed after reload; requires upgrade to a version that contains fixes natively. |
| ERSPAN ACLQOS core | Certain Gen1 platforms may core when performing ERSPAN with VLAN mapped to VNI. |
| Module ejector interrupt storm | Loose IO module seating may cause interrupt storms and platform manager crash. |
| BGP flapping on leaf reload/new leaf | Random BGP session flaps after reloading leaf or adding a new leaf in BGP infrastructure. |
| HW multipath path programming issue | Not all available equal‑cost paths are utilized; workaround is to bundle uplinks in L3 port-channel. |
| MAC mobility sequence | MAC mobility sequence may not update correctly upon endpoint movement between sites. |
| SPAN & sFlow interaction | SPAN sessions may fail to come up when sFlow data sources are configured. |
| SPAN stuck state | SPAN sessions may remain stuck when brought up with sFlow configured concurrently. |
| UDLD removed after upgrade | UDLD disable config on breakout interfaces removed after upgrade; requires reconfiguration. |
| HAP reset on system switchover | Some supervisor scenarios may generate HAP reset during system switchover. |
| Unexpected hardware rate‑limiter options | Hardware rate‑limiter options may appear incorrectly in show run output; workaround is write erase and reload. |
Resolved Issues
| Bug ID / Fix | Description |
|---|---|
| Stability enhancements | Improved stability of various protocol and process behaviors across system and line cards. |
| Control‑plane resiliency | Resolved intermittent control‑plane crash scenarios under specific traffic conditions. |
| Forwarding consistency | Corrected VXLAN and unicast forwarding inconsistencies seen in earlier releases. |
| Hardware monitoring | Enhanced accuracy for hardware monitoring and event reporting. |
| Multicast behavior | Fixed multicast packet handling issues on select platforms. |
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