At the Fabric
Extender configuration level, you can control the queue limit for a specified
Fabric Extender for egress direction (from the network to the host). You can
use a lower queue limit value on the Fabric Extender to prevent one blocked
receiver from affecting traffic that is sent to other noncongested receivers
("head-of-line blocking"). A higher queue limit provides better burst
absorption and less head-of-line blocking protection. You can use the
no form of
this command to allow the Fabric Extender to use all available hardware space.
Note |
At the system
level, you can set the queue limit for Fabric Extenders by using the
fex queue-limit
command. However, configuring the queue limit for a specific
Fabric Extender will override the queue limit configuration set at the system
level for that Fabric Extender.
|
You can specify the
queue limit for the following Fabric Extenders:
-
Cisco Nexus
2148T Fabric Extender (48x1G 4x10G SFP+ Module)
-
Cisco Nexus
2224TP Fabric Extender (24x1G 2x10G SFP+ Module)
-
Cisco Nexus
2232P Fabric Extender (32x10G SFP+ 8x10G SFP+ Module)
-
Cisco Nexus
2248T Fabric Extender (48x1G 4x10G SFP+ Module)
-
Cisco Nexus
N2248TP-E Fabric Extender (48x1G 4x10G Module)
-
Cisco Nexus N2348UPQ Fabric Extender (48x10G SFP+ 6x40G QSFP
Module)
This example shows
how to restore the default queue limit on a Cisco Nexus 2248T Fabric Extender:
switch# configure terminal
switch(config-if)# fex 101
switch(config-fex)# hardware N2248T queue-limit 327680
This example shows
how to remove the queue limit that is set by default on a Cisco Nexus 2248T
Fabric Extender:
switch# configure terminal
switch(config)# fex 101
switch(config-fex)# no hardware N2248T queue-limit 327680