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Fabric OS Administrator’s Guide
53-1002745-02
Route selection
4
Route selection
Selection of specific routes can be dynamic, so that the router can constantly adjust to changing
network conditions; or it may be static, so that data packets always follow a predetermined path.
Dynamic Load Sharing
The exchange-based routing policy depends on the Fabric OS Dynamic Load Sharing (DLS) feature
for dynamic routing path selection. When using the exchange-based routing policy, DLS is enabled
by default and cannot be disabled. In other words, you cannot enable or disable DLS when the
exchange-based routing policy is in effect.
When the port-based policy is in force, you can enable DLS to optimize routing. When DLS is
enabled, it shares traffic among multiple equivalent paths between switches. DLS recomputes load
sharing when any of the following occurs:
•
A switch boots up
•
An E_Port goes offline and online
•
An EX_Port goes offline
•
A device goes offline
Setting DLS
Use the following procedure to set up DLS:
1. Connect to the switch and log in using an account with admin permissions.
2. Enter the dlsShow command to view the current DLS setting.
One of the following messages appears:
•
“DLS is set” indicates that DLS is turned on.
•
“DLS is not set” indicates that DLS is turned off.
•
”DLS is set with Lossless enabled.” DLS is enabled with the Lossless feature. Load sharing
is recomputed with every change in the fabric, and existing routes can be moved to
maintain optimal balance. In Lossless mode, no frames are lost during this operation.
•
“DLS is set by default with current routing policy. DLS is set with Lossless enabled.” The
current routing policy (exchange-based) requires DLS to be enabled by default. In addition,
the Lossless option is enabled. Frame loss is prevented during a load sharing
recomputation. If you get this message, you cannot perform
step 3
, so you are done with
this procedure.
3. Enter the dlsSet command to enable DLS or enter the dlsReset command to disable it.
Example of setting and resetting DLS
switch:admin>
dlsshow
DLS is not set
switch:admin>
dlsset
switch:admin>
dlsshow
DLS is set
switch:admin>
dlsreset
switch:admin>
dlsshow
DLS is not set
Содержание Fabric OS 7.1.0
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Страница 116: ...116 Fabric OS Administrator s Guide 53 1002745 02 Inter switch links 4 FIGURE 7 Virtual channels on a QoS enabled ISL ...
Страница 132: ...132 Fabric OS Administrator s Guide 53 1002745 02 Frame Redirection 4 ...
Страница 194: ...194 Fabric OS Administrator s Guide 53 1002745 02 Ports and applications used by switches 6 ...
Страница 254: ...254 Fabric OS Administrator s Guide 53 1002745 02 Brocade configuration form 8 ...
Страница 274: ...274 Fabric OS Administrator s Guide 53 1002745 02 Validating a firmware download 9 ...
Страница 302: ...302 Fabric OS Administrator s Guide 53 1002745 02 Creating a logical fabric using XISLs 10 ...
Страница 344: ...344 Fabric OS Administrator s Guide 53 1002745 02 Concurrent zone transactions 11 ...
Страница 374: ...374 Fabric OS Administrator s Guide 53 1002745 02 Setting up TI over FCR sample procedure 12 ...
Страница 432: ...432 Fabric OS Administrator s Guide 53 1002745 02 Access Gateway N_Port failover with FA PWWN 16 ...
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Страница 490: ...490 Fabric OS Administrator s Guide 53 1002745 02 Ports on Demand 18 ...
Страница 498: ...498 Fabric OS Administrator s Guide 53 1002745 02 Supported topologies for ICL connections 19 ...
Страница 626: ...626 Fabric OS Administrator s Guide 53 1002745 02 Preparing a switch for FIPS B ...
Страница 630: ...630 Fabric OS Administrator s Guide 53 1002745 02 Hexadecimal Conversion C ...
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