Operational Defect Database
BugZero found this defect 4035 days ago.
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Hewlett Packard Enterprise | c03754583
CUSTOMER ADVISORY: HP B-series switches may have an issue bringing F-Ports online when multiple ports attempt to login at the same time
Last update date:
2/28/2024
Affected products:
Brocade 8Gb SAN Switch for HPE BladeSystem c-Class
HPE 1606 Extension SAN Switch
HPE 4400 Enterprise Virtual Array
HPE 8/24 SAN Switch
HPE 8/40 SAN Switch
HPE 8/8 SAN Switch
HPE 8/80 SAN Switch
HPE B-series SN6000B Fibre Channel Switch
HPE Encryption SAN Switch
HPE SN3000B Fibre Channel Switch
HPE Storage SAN Director Switch
HPE B-series Encryption Option
Affected releases:
No affected releases provided.
Fixed releases:
No fixed releases provided.
Description:
Info
In HP B-Series switch configurations where the pattern of Fabric Login (FLOGI) requests always exceeds the throttle limit value and continues to be sent simultaneously, the switch will persistently issue a Busy status, and the ports will never be able to come online successfully. To protect against high Central Processing Unit (CPU) loads after initially coming online, the switch is designed to throttle and manage the number of FLOGI requests that are processed at any given time. By default, the maximum number of FLOGIs allowed to be processed is 16. However, this throttle limit value can be modified through the configure command. If the switch receives multiple simultaneous FLOGI requests, which exceed the throttle limit value, the switch rejects all FLOGI requests with a Busy status. In configurations where the pattern of FLOGI requests continue to be sent simultaneously, and always exceeds the throttle limit value, the switch will continue to issue a Busy status, and the ports will never be able to successfully come online. F-ports failing to come online for this issue show a state of FC Disabled (Switch not ready for F or L ports) in the switchshow Command Line Interface (CLI) output. This issue can occur when a switch with many F-ports has gone through: A cold restart of the switch, such as: If the switch is powered off and then back on If the switch is rebooted by issuing any command that invokes a reboot If the switch restarts as a result of a cold reboot A major configuration change, such as: Enabling Virtual Fabrics (VF) Enabling Fibre Channel Routing (FCR) Performing a configuredownload that involves the switchdisable/switchenable command Moving a large number of ports to create a new VF logical switch No risk exists if encountering this issue after a successful warm failover of two CPs. A successful firmware upgrade to one of the at risk versions of the Fabric Operating System (FOS) does not expose this issue. During a firmware upgrade, the only risk that occurs is when the upgrade encounters a serious error, and a cold restart of the switch is required to complete the upgrade.
Scope
All B-series platforms running FOS version 7.0.1a, 7.0.1b, 7.0.2 or 7.0.2a are affected by this advisory.
Resolution
HP recommends upgrading to FOS v7.0.2c or later. These versions contain a fix for the throttling logic. Workaround The F-ports must be manually throttled either from the host/device side by only allowing a small number of FLOGIs to be issued at a time, or the F-ports must be controlled from the switch side by completing the following steps: Persistently disable all F-ports with portcfgpersistentdisable command or through WebTools. Disable the switch with the switchdisable command or through WebTools. Enable the switch with the switchenable command or through WebTools. Persistently enable each F-port one at a time with the portcfgpersistentenable command or through WebTools. Proactive Updates Receive support alerts (such as Customer Advisories), driver updates, software, firmware, and customer replaceable components, in your e-mail through HP Subscriber's Choice. Sign up for Subscriber's Choice Driver, Patch, Security, and Support alerts at the following URL: http://www.hp.com/go/myadvisory
