Cisco Nexus 3000 Series NX-OS Release Notes, Release 10.2(5)M

March 7, 2023

Cisco NX-OS Release 10.2(5)M became available.

CSCwe42909

Headline: interfaces not coming back up after reload on Nexus 3500

Symptoms: Interfaces using SFP SFP-H10GB-CU1M could remain down after reload of vPC Primary switch

Workarounds: Bounce the affected interface (shut/no shut) on the vPC peer that was not reloaded

CSCwe00551

Headline: Multicast first packet failed to created (S,G) entry on LHR

Symptoms:

·       Receiver comes online before sender sends packet.

·       (*,G) entry created on RP, LHR and Intermediate routers.

·       Sender first Multicast packet getting punted to CPU on FHR.

·       (S,G) entry created on RP.

·       First packet not reaching to LHR and receiver.

·       Second multicast packet reaching to LHR and then (S,G) entry created on LHR.

·       Configure "ip routing multicast software-replicate" on FHR but no change.

Workarounds: Configure "ip routing multicast software-replicate iif"  command on the RP.

CSCwd38617

Headline: N3K-C3548 punts DHCP/BOOTP packets to CPU for non-relay enabled vlans

Symptoms: Observation of DHCP packets in Ethanalyzer for a VLAN that is either has no SVI or is not configured for DHCP relay. Packets are counted as hits in "show system internal access-list input entries detail" for DHCP relay entries in another VLAN.

Workarounds: None.

CSCwd15533

Headline: Removal of "flowcontrol receive on" stops pause frames from being counted on Nexus 3548.

Symptoms: Receipt of a pause frame where "flowcontrol receive on" was previously configured. We no longer see the pause frame counter increment on the switch; however, the input error counter does continue to increment.

Workarounds: Reload switch after removing "flowcontrol receive on" to acknowledge Rx pause frames per the interface counters.

CSCwd13945

Headline: Show hardware profile buffer monitor detail last 10 -or- last 15 displays repeated output.

Symptoms: Nexus 3500 switch running Cisco NX-OS Release 9.3.9. Running the following command does not show the full interface output with "last 10" -or- "last 15" keyword.

Workarounds: Use "show hardware profile buffer monitor detail last 1" command.

CSCwd07045

Headline: Nexus 3000 can only configure up to 3 syslog servers

Symptoms: A Nexus 3000 series switch running 7.x, 9.x software will throw the following message when trying to configure more than 3 logging servers.

Workarounds: None

CSCwd94713

Headline: ALGO_BOOST_SERVICES_PKG license gets triggered when configuring OpenFlow on Nexus 3500

Symptoms: Nexus 3500 switches in version 9.3.x require ALGO_BOOST_SERVICES_PKG when OpenFlow is configured.

MXC.TAC.C.08-3548-01# show license usage Feature                      Ins  Lic   Status Expiry Date Comments                                 Count--------------------------------------------------------------------------------NXOS_OE_PKG                   No    -   Unused             -TP_SERVICES_PKG               No    -   Unused             -NXOS_ADVANTAGE_XF             No    -   Unused             -NXOS_ESSENTIALS_XF            No    -   Unused             -NETWORK_SERVICES_PKG          No    -   Unused             -LAN_BASE_SERVICES_PKG         Yes   -   Unused never       -ALGO_BOOST_SERVICES_PKG       No    -   In use             Honor Start 53M 15SLAN1K9_ENT_SERVICES_PKG       No    -   Unused             -LAN_ENTERPRISE_SERVICES_PKG   No    -   Unused             ---------------------------------------------------------------------------------MXC.TAC.C.08-3548-01# show license usage ALGO_BOOST_SERVICES_PKG Application----------------------------------------------------------------------------Warp Mode----------------------------------------------------------------------------MXC.TAC.C.08-3548-01# The following log is seen in the logs after enabling the OpenFlow Hybrid Forwarding-Mode by using the 'hardware profile forwarding-mode openflow-hybrid' global config command.2004 Feb  1 11:52:31 switch %USER-2-SYSTEM_MSG: !!!!!!  WARNING: 'ALGO_BOOST_SERVICES_PKG' LICENSE NOT FOUND ON THE SYSTEM !!!!!!.  You have tried to enable a licensed feature [Warp mode] without installing the ‘ALGO_BOOST_SERVICES_PKG' license, which has not been found on the  system.  - pltfm_config

Workarounds: None. OpenFlow should not require ALGO_BOOST_SERVICES_PKG license.

CSCwd90070

Headline: Nexus 3548 in WARP mode may fail to correctly install ECMP ucast route.

Symptoms: Nexus 3500 in WARP fails to forward unicast traffic. ECMP values 254/65535 for the destination route are installed in an internal table:

switch# slot 1 show hardware internal libsdk mtc cache-l3 ucast-cache-l3 valid-only | i 254/65535 8203 1     4 10.0.0.0/024 254/65535 0    0 0 0 0 1 4100 aaaa:bbbb:cccc 0 0  1  0    0   56    0    0FIB_DROP are seen:# slot 1 show hardware internal libsdk mtc port exception-stats start-addr 44 end-addr 44 | i "FRONT ASIC|FIB_DROP" next 3FRONT ASIC                                                                     PORT  PORT           P O R T   E X C E P T I O N   S T A T I S T I C S         ----- ----    --------------------- --------------------- ---------------------   44   31--               RB_RES_CHECK1_ERR_B1       ROUTED_UCST_ERR              FIB_DROP              --------------------- --------------------- ---------------------                                  0                     0                     6                                  0                     0                  4176

Workarounds: Only have a single path installed to the impacted destination or non-ECMP paths to impacted destination. You must then clear the route (show ip route 10.0.0.0/24).

CSCwd75851

Headline: /nxos/xlog getting filled 100% with repeated "copy run start" and log files are not getting rolled over.

Symptoms: When configuration changes are done through automation and when multiple sessions try to save the config changes simultaneously and repeatedly, we may experience below syslogs:

2022 Oct 11 03:29:18.824 N3k %SYSMGR-3-CFGWRITE_FAILED: Configuration copy failed (error-id 0x401E0004).2022 Oct 11 03:29:20.983 N3k %SYSMGR-3-CFGWRITE_FAILED: Configuration copy failed (error-id 0x401E0000).Over the time, /nxos/xlog folder gets filled 100% and we may not able to save the config anymore.`show system internal flash`Mount-on                  1K-blocks      Used   Available   Use%  Filesystem----- skipped ne/nxos/xlog                    10240     10240           0    100   none <<<<<<<<<<

Workarounds: Avoid simultaneous config sessions and excessive/repeated config save operation.

N3K-C3548P-XL                        

Cisco Nexus 3548-XL switch

N2200-PAC-400W                    

Cisco Nexus 2000 or 3000 400W AC power supply, forward airflow (port side exhaust)

N2200-PAC-400W-B

Cisco Nexus 2000 or 3000 400W AC power supply, reverse airflow (port side intake)

N2200-PDC-400W

Cisco Nexus 2000 or 3000 400W DC power supply, forward airflow (port side exhaust)

N3K-PDC-350W-B

Cisco Nexus 2000 or 3000 350W DC power supply, reverse airflow (port side intake)

NXA-FAN-30CFM-B

Cisco Nexus 2000 or 3000 individual fan, reverse airflow (port side intake)

NXA-FAN-30CFM-F

Cisco Nexus 2000 or 3000 individual fan, forward airflow (port side exhaust)

N3K-C3636C-R                                   

The Cisco Nexus 3636C-R is a 1 rack unit (RU) switch with 36 100-Gigabit QSFP28 ports, 40-Gigabit QSFP, 2 management ports, 1 console port, and 1 USB port. The switch supports both port-side exhaust and port-side intake airflow schemes. The switch has two power supplies, one for operations and the other for redundancy. Both power supplies must be either AC power supplies or DC power supplies.

N3K-C36180YC-R

The Cisco Nexus 36180YC-R is a 1 rack unit (RU) switch with 48 1/10/25-Gigabit SFP ports and 6 40-Gigabit QSFP/100-Gigabit QSFP28 ports, 1 management port, 1 console port, and 1 USB port. The switch supports both port-side exhaust and port-side intake airflow schemes. The switch has two power supplies, one for operations and the other for redundancy. Both power supplies must be either AC power supplies or DC power supplies.