Autosensing; Configuring Sd Port Frame Encapsulation; Configuring Receive Data Field Size - Cisco Nexus 5000 Series Configuration Manual
Nx-os san switching configuration guide
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Also See for Nexus 5000 Series:
- Cli configuration manual (660 pages) ,
- Configuration manual (334 pages) ,
- Command reference manual (196 pages)
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Configuring Fibre Channel Interfaces
Command or Action
Step 4
switch(config-if)# no switchport speed
Autosensing
Autosensing speed is enabled on all 4-Gbps interfaces by default. This configuration enables the interfaces
to operate at speeds of 1 Gbps, 2 Gbps, or 4 Gbps on the 4-Gbps ports. When autosensing is enabled for an
interface operating in dedicated rate mode, 4-Gbps of bandwidth is reserved, even if the port negotiates at an
operating speed of 1-Gbps or 2-Gbps.
Configuring SD Port Frame Encapsulation
The switchport encap eisl command only applies to SD port interfaces. This command determines the frame
format for all frames transmitted by the interface in SD port mode. If the encapsulation is set to EISL, all
outgoing frames are transmitted in the EISL frame format, for all SPAN sources.
The switchport encap eisl command is disabled by default. If you enable encapsulation, all outgoing frames
are encapsulated, and you will see a new line (Encapsulation is eisl) in the show interface SD_port_interface
command output.
Configuring Receive Data Field Size
You can configure the receive data field size for native Fibre Channel interfaces (but not for virtual Fibre
Channel interfaces). If the default data field size is 2112 bytes, the frame length will be 2148 bytes.
To configure the receive data field size, perform this task:
SUMMARY STEPS
1. switch# configuration terminal
2. switch(config)# interface fc slot/port
3. switch(config-if)# switchport fcrxbufsize 2000
DETAILED STEPS
Command or Action
Step 1
switch# configuration terminal
Step 2
switch(config)# interface fc slot/port
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide
18
Purpose
Reverts to the factory default (auto) administrative speed of the interface.
Purpose
Enters configuration mode.
Selects a Fibre Channel interface and enters interface
configuration mode.
Configuring Fibre Channel Interfaces
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