Service Manual

Fabric OS 7.4.0a Release Notes v2.0 Page 11 of 53
• Untagged and single tagged packets are supported.
• Stacked/double (IEEE 802.1ad) tagged packets from hosts are not supported. Packets will be dropped.
Traffic Control List
FOS v7.4 supports Traffic Control List (TCL) to manage and route IP flows. Each TCL is identified by a unique
user configured name. FOS v7.4 supports maximum 128 TCLs. System generated default TCL will drop all the
incoming packets.
FCIP Enhancements to Brocade 7840
Base Switch Support for 7840
FOS v7.4 enhances Virtual Fabric support on 7840 switches to include the base switch, i.e., to support XISL.
Users can configure E_port (ISL over FC), EX_port (IFL over FC), and VE_port (ISL over GE) in base switch. The
maximum number of logical switches supported — including the base switch — remains four.
FCIP Hot Code Load (HCL)
FOS v7.4 enhances FCIP HCL support in the following conditions, which were excluded in FOS v7.3.
• Support concurrent FCIP HCL on all 7840 switches in the configuration
• Support multiple sites for FCIP HCL
Monitoring and Alerting Policy Suite (MAPS) Enhancements
FOS v7.4 has a number of important MAPS feature enhancements. These include:
• Basic monitoring without Fabric Vision license
• Monitor NPIV device login limits
• Monitor backend ports
• Monitor FCIP circuit QoS
• Monitor FCIP circuit RTT and jitter on Brocade 7800 and FX8-24 blade
• Fabric Performance Impact monitoring enhancement
• Slow drain device quarantine action for Fabric Performance Impact monitoring
• Port toggle action
• FICON notification action
• Alert quiet time support
• Usability enhancements
Monitoring without Fabric Vision license
FOS v7.4 introduces a new basic monitoring capability in MAPS. The basic monitoring capability allows end
users without Fabric Vision licenses on their switches to use MAPS to monitor overall switch status, FRU health,
and switch resource categories under the new pre-defined MAPS policy dflt_base_policy.
Monitor NPIV device login limits
FOS v7.4 introduces MAPS monitoring of NPIV login limits. FOS has limits on the number of NPIV devices that
can login to a physical F_port. MAPS monitors the percentage of logged in NPIV devices relative to the
maximum number of NPIV logins allowed on the F_port to alert users before the limit is reached.
Monitor backend ports
FOS v7.4 introduces back-end port error monitoring in MAPS. Users can take early recovery actions if any of the
monitored back-end errors have crossed specified thresholds. Typical recovery actions include SerDes tuning
on a switch or reseating blades. For detailed instructions on these actions, please contact your support
provider for additional assistance.