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48-30
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 48 Configuring FCIP
Using the FCIP Wizard
Figure 48-22 FCIP Link Write Acceleration
Tip FCIP write acceleration can be enabled for multiple FCIP tunnels if the tunnels are part of a dynamic
PortChannel configured with channel mode active. FCIP write acceleration does not work if multiple
non-PortChannel ISLs exist with equal weight between the initiator and the target port. Such a
configuration might cause either SCSI discovery failure or failed WRITE or READ operations.
Tip Do not enable time stamp control on an FCIP interface with write acceleration configured.
Note Write acceleration cannot be used across FSPF equal cost paths in FCIP deployments. Native Fibre
Channel write acceleration can be used with Port Channels. Also, FCIP write acceleration can be used
in Port Channels configured with channel mode active or constructed with Port Channel Protocol (PCP).
FCFC
FCIP over
WAN
105224
Initiator MDS 9000 MDS 9000 Target
Transfer ready
Transfer ready
Transfer ready
Command
Command
Data transfer
Data transfer
Status
Status
Without
acceleration
RTT1
RTT1
RT2
FCFC
FCIP over
WAN
Initiator MDS 9000 MDS 9000 Target
With
acceleration