HP Cisco Nexus 5000 Cisco Nexus 5000 Series Release Notes Release 4.0(1a)N1(1a - Page 4

Release 4.0(1a)N1(1a) Upgrade and Downgrade Issues Send documentation comments to [email protected] The errdisable recovery cause pause-rate-limit Command switch(config)# errdisable recovery cause ? pause-rate-limit Enable timer to recover from pause rate limit error disabled state switch(config)# [no] errdisable recovery cause pause-rate-limit When an Ethernet port experiences severe congestion due to a large amount of flow control (pause) frames received from the peer for an extended duration of time (10s), the port is placed in an error disabled state. The errdisable recovery cause pause-rate-limit command enables an automatic recovery of the port after a pre-defined interval of recovery time (if the port was error-disabled as a result of the pause-rate-limiting function). By default, this recovery mechanism is not enabled. The following command allows configuration of the timeout value for automatic recovery. The default value is 300 seconds. switch(config)# errdisable recovery interval ? Timer-interval (sec) Kickstart Break Sequence Press the Ctrl-] key sequence from the console port session when the switch begins the Cisco NX-OS software boot sequence to enter the boot prompt mode. Ctrl-] switch(boot)# Release 4.0(1a)N1(1a) Upgrade and Downgrade Issues This section describes issues that you may encounter when you upgrade or downgrade the Cisco NX-OS software release on the Cisco Nexus 5000 Series switch. It provides examples of configuration syntax differences for some of these changes. Upgrade and downgrade is supported between the following versions of the Cisco NX-OS software on the Cisco Nexus 5000 Series switches: • 4.0(0)N1(2a) • 4.0(1a)N1(1) • 4.0(1a)N1(1a) Upgrade and downgrade is not supported between the following versions of the Cisco NX-OS software on the Cisco Nexus 5000 Series switches: • 4.0(1a)N1(1a) • 4.0(1a)N2(1) All the documented behavior for upgrade and downgrade between 4.0(0)N1 based releases and 4.0(1a)N1(1) also applies to upgrade and downgrade between 4.0(0)N1 based releases and 4.0(1a)N1(1a). The following upgrade and downgrade issues occur as a result of CSCsy37432, CSCsy53275, CSCsy09062, CSCsy08516 (For details see, Resolved Caveats-Cisco NX-OS Release 4.0(1a)N1(1a), page 18 and Resolved Caveats-Cisco NX-OS Release 4.0(1a)N1(1), page 19): Cisco Nexus 5000 Series Release Notes, Release 4.0(1a)N1(1a) 4 OL-16601-01