FW V06.XX/HAFM SW V08.02.00 HP StorageWorks Director Element Manager User Guide (AA-RTDUC-TE, July 2004)
Table Of Contents
- Contents
- About this Guide
- Overview
- Feature Keys
- Managing the Director
- Element Manager Description
- Using the Element Manager
- Backing Up and Restoring Element Manager Data
- Monitoring and managing the Director
- Hardware View
- Port Card View
- Port List View
- Node List View
- Performance View
- FRU List View
- Port Operational States
- Link Incident Alerts
- Threshold Alerts
- Configuring the Director
- Configuring Identification
- Configuring Management Style
- Configuring Operating Parameters
- Configuring a Preferred Path
- Configuring Switch Binding
- Configuring Ports
- Configuring Port Addresses (FICON Management Style)
- Configuring an SNMP Agent
- Configuring Open Systems Management Server
- Configuring FICON Management Server
- Configuring Feature Key
- Configuring Date and Time
- Configuring Threshold Alerts
- Creating New Alerts
- Figure 49: Configure Threshold Alert(s) dialog box
- Figure 50: New Threshold Alerts dialog box - first screen
- Figure 51: New Threshold Alerts dialog box - second screen
- Figure 52: New Threshold Alerts dialog box - third screen
- Figure 53: New Threshold Alerts dialog box - summary screen
- Figure 54: Configure Threshold Alerts dialog box - alert activated
- Modifying Alerts
- Activating or Deactivating Alerts
- Deleting Alerts
- Creating New Alerts
- Configuring Open Trunking
- Exporting the Configuration Report
- Enabling Embedded Web Server
- Enabling Telnet
- Backing Up and Restoring Configuration Data
- Using Logs
- Using Maintenance Features
- Optional Features
- Information and Error Messages
- Index
Optional Features
208 Director Element Manager User Guide
Open Trunking
Interswitch links (ISLs) connect ports between E_Ports on Fibre Channel switches
and link these switches into a multiswitch fabric. Multiple ISLs may be connected
between the switches in the fabric. Data from an attached end device (server or
storage) flows through these ISLs to a target end-device connected to a switch
somewhere in the fabric. A data flow is data received from a specified receive port
that is destined for a port in a specified target domain (switch). The list of ISLs
that are candidates for being rerouted (to or from) is derived from the fiber
shortest path first (FSPF) algorithm.
The Open Trunking feature monitors the average data rates of all traffic flows on
ISLs (from a receive port to a target domain), and periodically adjusts routing
tables to reroute data flows from congested links to lightly loaded links and
optimize bandwidth use. The objective of Open Trunking is to make the most
efficient possible use of redundant ISLs between neighboring switches, even if
these ISLs have different bandwidths.
Load-balancing among the ISLs does not require user configuration, other than
enabling Open Trunking. However, if desired, you can modify default settings for
congestion thresholds (per port) and low BB_Credit threshold.
In particular, you do not need to manually configure ISLs into trunk groups of
redundant links where data can be off-loaded. Candidate links for rerouting flow
are identified and maintained automatically. This means that flow may be rerouted
onto a link that goes to a different adjacent switch, as long as that link is on the
least cost/shortest path to the destination domain ID.
To install and enable this option, choose the Configure Feature Key option under
the Element Manager’s Configure menu. See “Configuring Feature Key” on
page 149.