470 Configuring and monitoring FCIP extension services
Channel ISLs implemented through the FC-FC Routing Service rather than FCIP. FC Fastwrite is supported in
Fabric OS 5.3.x and later.
Figure 82
Typical network topology for FC Fastwrite
Platforms and OS requirements for FC Fastwrite
Fabric OS supports FC Fastwrite between two HP StorageWorks 400 Multi-Protocol Routers or two HP
StorageWorks 4/256 SAN Directors with B-Series Multi-Protocol Router Blade connected by a Fibre
Channel network. Fabric OS 5.3.0 or later is required at both ends of the tunnel in order to enable FC
Fastwrite.
NOTE:
FC Fastwrite and FCIP tunnels cannot be used on the same HP StorageWorks 400 Multi-Protocol
Router or FC4-18i blade.
Constraints for FC Fastwrite
Consider the following constraints when configuring FC Fastwrite:
•
FC Fastwrite disables the local Ethernet ports (ge0 and ge1), making it impossible to configure FC
Fastwrite and FCIP tunnels on the same HP StorageWorks 400 Multi-Protocol Router or FC4-18i blade.
•
FC Fastwrite does not work in FICON environments.
•
FC Fastwrite flows may be routed to another HP StorageWorks 400 Multi-Protocol Router or FC4-18i
blade on the FC network. The HP StorageWorks 400 Multi-Protocol Router or FC4-18i blade may have
active FCIP tunnels over an IP network. FC Fastwrite flows may be passed through the FCIP tunnel, but
only if the FCIP Fastwrite option is disabled on the tunnel.
•
FC Fastwrite does not support loop device configurations for more than one device.
•
FC Fastwrite is not supported in interop mode 2 or 3.
How FC Fastwrite works
FC Fastwrite eliminates the latency inherent in sending a Transfer Ready (X_RDY) back to the initiator when
writing data across ISLs to geographically distant target devices. FC Fastwrite provides a proxy target (PT)
local to the initiator host, and a proxy initiator (PI) local to the target storage device.
Figure 83
shows how
FC Fastwrite works.
1.
The initiator sends a write command (WR_CMD).
2.
The PT responds with a Transfer Ready (X_RDY), enabling the host to send more data.
3.
The target device processes the write command, and sends a Transfer Ready to solicit more data. The PI
intercepts the Transfer Ready, and begins sending data received from the host.
Содержание A7533A - Brocade 4Gb SAN Switch Base
Страница 1: ...HP StorageWorks Fabric OS 6 2 administrator guide Part number 5697 0016 Edition May 2009 ...
Страница 24: ...24 ...
Страница 99: ...Fabric OS 6 2 administrator guide 99 ...
Страница 100: ...100 Managing user accounts ...
Страница 118: ...116 Configuring standard security features ...
Страница 164: ...162 Configuring advanced security features ...
Страница 234: ...232 Installing and maintaining firmware ...
Страница 268: ...266 Administering advanced zoning ...
Страница 284: ...282 Configuring Enterprise class platforms ...
Страница 292: ...290 Routing traffic ...
Страница 294: ...292 Interoperability for merged SANs ...
Страница 302: ...300 Configuring the Distributed Management Server ...
Страница 334: ...332 iSCSI gateway service ...
Страница 340: ...338 Administering NPIV ...
Страница 407: ...Fabric OS 6 2 administrator guide 405 ...
Страница 408: ...406 Using the FC FC routing service ...
Страница 438: ...434 Administering extended fabrics ...
Страница 460: ...456 Administering ISL trunking ...
Страница 498: ...494 Configuring and monitoring FCIP extension services 556200 Bps 30s avg 491394 Bps lifetime avg ...
Страница 516: ...512 FICON fabrics ...
Страница 526: ...522 Configuring and monitoring FICON Extension Services ...
Страница 540: ...536 Configuring the PID format ...
Страница 544: ...540 Understanding legacy password behavior ...
Страница 546: ...542 Mixed fabric configurations for non merge SANs ...
Страница 550: ...546 Migrating from an MP Router to a 400 MP Router ...
Страница 558: ...554 Inband Management ...
Страница 572: ...568 ...