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440
Fabric OS Administrator’s Guide
53-1002446-01
ISL trunking over long distance fabrics
22
Tx: Bandwidth 16.00Gbps, Throughput 1.67Gbps (12.12%)
Rx: Bandwidth 16.00Gbps, Throughput 1.66Gbps (12.11%)
Tx+Rx: Bandwidth 32.00Gbps, Throughput 3.33Gbps (12.11%)
ISL trunking over long distance fabrics
In long-distance fabrics, if a port speed is set to autonegotiate, then the maximum speed, which is
16 Gbps, is assumed for reserving buffers for the port. If the port is only running at 2 Gbps, this
wastes buffers. For long-distance ports, you should specify the port speed instead of setting it to
autonegotiate.
In addition to the criteria listed in
“Supported configurations for trunking”
on page 436, observe
the following criteria for trunking over extended fabrics:
•
It is supported only on switches running Fabric OS v6.1.0 and later.
•
Extended Fabrics and Trunking licenses are required on all participating switches.
•
When configuring long distance, the portCfgLongDistance
--
vc_translation_link_init
parameter must be set the same on all ports in an extended fabric.
For additional information on configuring long distance, see
“Configuring an extended ISL”
on
page 453.
Table 75
describes Trunking over long distance support for the Backbones and supported blades.
NOTE
The L0 mode supports up to 5 km at 2 Gbps, up to 2 km at 4 Gbps, and up to 1 km at 8 Gbps.
The distance for the LS mode is static. You can specify any distance greater than 10 km.
The distance supported depends on the available buffers, number of back-end ports, and the
number of ports that are offline. For more information on setting port speeds, refer to
Chapter 3,
“Performing Advanced Configuration Tasks”
.
EX_Port trunking
You can configure EX_Ports to use trunking just as you do regular E_Ports. EX_Port trunking
support is designed to provide the best utilization and balance of frames transmitted on each link
between the FC router and the edge fabric. You should trunk all ports connected to the same edge
fabrics.
TABLE 75
Trunking over distance for the Backbones
Long distance mode
Distance
Number of 2 Gbps ports
Number of 4 Gbps ports
LE
10 km
48 (six 8-port trunks)
48 (six 8-port trunks)
L0
Normal
See note below
48 (six 8-port trunks)
LD
200 km
4 (one 2-port trunk per switch)
0
LD
250 km
4 (one 2-port trunk per switch)
0
LD
500 km
0
0
LS
Static
See note below
Summary of Contents for Fabric OS v7.0.1
Page 1: ...53 1002446 01 15 December 2011 Fabric OS Administrator s Guide Supporting Fabric OS v7 0 1 ...
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Page 214: ...176 Fabric OS Administrator s Guide 53 1002446 01 Management interface security 7 ...
Page 228: ...190 Fabric OS Administrator s Guide 53 1002446 01 Brocade configuration form 8 ...
Page 248: ...210 Fabric OS Administrator s Guide 53 1002446 01 Validating a firmware download 9 ...
Page 334: ...296 Fabric OS Administrator s Guide 53 1002446 01 Setting up TI over FCR sample procedure 12 ...
Page 360: ...322 Fabric OS Administrator s Guide 53 1002446 01 Encryption and compression example 14 ...
Page 404: ...366 Fabric OS Administrator s Guide 53 1002446 01 ...
Page 430: ...392 Fabric OS Administrator s Guide 53 1002446 01 Ports on Demand 18 ...
Page 502: ...464 Fabric OS Administrator s Guide 53 1002446 01 Buffer credit recovery 23 ...
Page 572: ...534 Fabric OS Administrator s Guide 53 1002446 01 Hexadecimal overview D ...
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