Reference Guide
64 Fabric OS FCIP Administrator’s Guide
53-1002474-01
Options for enhancing tape I/O performance
3
FCIP Fastwrite and OSTP configurations
To help understand the supported configurations, consider the configurations shown in the two
figures below. In both cases, there are no multiple equal-cost paths. In Figure 16, there is a single
tunnel with Fastwrite and OSTP enabled. In the Figure 17, there are multiple tunnels, but none of
them create a multiple equal-cost path.
FIGURE 16 Single tunnel, Fastwrite and OSTP enabled
FIGURE 17 Multiple tunnels to multiple ports, Fastwrite and OSTP enabled on a per-tunnel/per-port basis
H1
FCIP tunnel
FW=1, TA=1
Connection can be
VE-VE or VEX-VE
H2
Hn Hn
GE0 GE0
GE1 GE1
172.0.1.2
FC SAN FC SAN
.
.
.
T0
T1
Ta
Ta
Tn
H
1
H
1
H
2
H
3
H
4
H
5
H
6
H
7
H
8
H
9
H
10
H
n
H
11
FCIP tunnel 2
FW=1, TA=0
FCIP tunnel 0
FW=0, TA=0
H
2
GE
0
GE
0
GE
1
GE
0
GE
1
GE
1
GE
0
FC SAN
FC SAN
FC SAN
FCIP tunnel 1
FW=1, TA=1
FCIP tunnel 0
FW=1, TA=1
FCIP tunnel 1
FW=0, TA=0