9 SCG3252 | Cisco Nexus 9504 Switch Configuration Guide for Dell SC Series SANs
2.6 Disabling Data Center Bridging (DCB)
All steps in Section 2.6 are required in order to properly disable DCB. Also, when upgrading from previous
versions to version 7.0(3)I1(2), Section 2.6 must be performed to properly disable DCB.
switch# configure
switch(config)#lldp tlv-select dcbxp
switch(config)#copy running-config startup-config
switch(config)#no lldp tlv-select dcbxp
switch(config)#exit
switch#copy running-config startup-config
Note: The above steps are needed due to Cisco Bug Number “CSCuo63486 LLDP - link err-disabled
upon reload when dcbx tlv is disabled”.
2.7 Enable link level flow control (802.3x)
You must perform this step for each individual port that is connected to a storage controller or a host
server interface port, or you can specify a range of ports to configure.
switch# configure
switch(config)#interface ethernet 1/1-48 , ethernet 2/1-48
switch(config-if-range)#priority-flow-control mode off
switch(config-if-range)#flowcontrol send off
switch(config-if-range)#flowcontrol receive on
switch(config-if-range)#exit
2.8 Configure portfast on edge ports
switch(config)#interface ethernet 1/1-48 , ethernet 2/1-48
switch(config-if-range)#spanning-tree port type edge
Warning: edge port type (portfast) should only be enabled on ports connected to
a single host. Connecting hubs, concentrators, switches, bridges, etc… to this
interface when edge port type (portfast) is enabled, can cause temporary
bridging loops. Use with CAUTION.
Edge Port Type (Portfast) will be configured in 96 interfaces due to the range
commend but will only have effect when the interfaces are in a non-trunking
mode.
switch(config-if-range)#exit
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