Forward error correction
......................................................................................................................................................................................................................................
103
FEC limitations
................................................................................................................................................................................................................................................
103
Enabling forward error correction
.........................................................................................................................................................................................................
103
Disabling forward error correction
........................................................................................................................................................................................................
104
Enabling or disabling FEC for long-distance ports
...................................................................................................................................................................
105
Displaying and clearing the FEC counters
......................................................................................................................................................................................
105
FEC-via-TTS
....................................................................................................................................................................................................................................................
105
Routing Traffic
......................................................................................................................................................................................................................................................................
107
Routing overview
......................................................................................................................................................................................................................................................
107
Paths and route selection
..........................................................................................................................................................................................................................
107
FSPF
......................................................................................................................................................................................................................................................................
107
Fibre Channel NAT
.......................................................................................................................................................................................................................................
109
Inter-switch links
.......................................................................................................................................................................................................................................................
109
Buffer credits
........................................................................................................................................................................................................................................................
111
Congestion versus over-subscription
....................................................................................................................................................................................................
111
Virtual channels
...................................................................................................................................................................................................................................................
111
Gateway links
................................................................................................................................................................................................................................................................
112
Configuring a link through a gateway
...................................................................................................................................................................................................
113
Routing policies
...........................................................................................................................................................................................................................................................
114
Notes
......................................................................................................................................................................................................................................................................
114
Displaying the current routing policy
....................................................................................................................................................................................................
114
Port-based routing
.........................................................................................................................................................................................................................................
114
Exchange-based routing
.............................................................................................................................................................................................................................
115
Device-based routing
....................................................................................................................................................................................................................................
115
Dynamic Path Selection
...............................................................................................................................................................................................................................
115
Route selection
............................................................................................................................................................................................................................................................
116
Dynamic Load Sharing
.................................................................................................................................................................................................................................
116
Frame order delivery
................................................................................................................................................................................................................................................
117
Forcing in-order frame delivery across topology changes
.....................................................................................................................................................
118
Restoring out-of-order frame delivery across topology changes
.......................................................................................................................................
118
Enabling Frame Viewer
................................................................................................................................................................................................................................
118
Using Frame Viewer to understand why frames are dropped
.............................................................................................................................................
119
Lossless Dynamic Load Sharing on ports
................................................................................................................................................................................................
120
Lossless core
......................................................................................................................................................................................................................................................
121
Configuring Lossless Dynamic Load Sharing
...............................................................................................................................................................................
121
Lossless Dynamic Load Sharing in Virtual Fabrics
....................................................................................................................................................................
122
Two-hop Lossless DLS route update
................................................................................................................................................................................................
122
Frame Redirection
...................................................................................................................................................................................................................................................
123
Creating a frame redirect zone
...............................................................................................................................................................................................................
124
Deleting a frame redirect zone
...............................................................................................................................................................................................................
125
Viewing frame redirect zones
..................................................................................................................................................................................................................
125
Buffer-to-Buffer Credits and Credit Recovery
..................................................................................................................................................................................................
127
Buffer credit management
.................................................................................................................................................................................................................................
127
Buffer-to-buffer flow control
...................................................................................................................................................................................................................
127
Optimal buffer credit allocation
............................................................................................................................................................................................................
128
Fibre Channel gigabit values reference definition
.......................................................................................................................................................................
128
Buffer credit allocation based on full-size frames
.......................................................................................................................................................................
129
Allocating buffer credits based on average-size frames
...........................................................................................................................................................
131
Configuring buffers for a single port directly
..................................................................................................................................................................................
132
Brocade Fabric OS Administration Guide, 8.0.1
6
53-1004111-02