Frame Encapsulation; Receive Data Field Size - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Fibre Channel Interfaces
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
To configure extended BB_credits for a MDS-14/2 interface or for an interface in a Cisco MDS 9216i
switch, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# fcrxbbcredit extended enable
switch(config)# no fcrxbbcredit extended
enable
Step 3
switch(config)# interface fc1/1
switch(config-if)#
Step 4
switch(config-if)# switchport fcrxbbcredit
extended 1500
switch(config-if)# no switchport fcrxbbcredit
extended 2500
Step 5
switch# do show int fc3/2
fc3/2 is trunking
Hardware is Fibre Channel, SFP is short wave
laser w/o OFC (SN)

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 encap is set to EISL, all
frames are transmitted in the EISL frame format irrespective of the SPAN source(s).
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 (
SD_port_interface command output (see the

Receive Data Field Size

You can also configure the receive data field size for Fibre Channel interfaces. If the default data field
size is 2112 bytes, the frame length will be 2148 bytes.
Use the switchport fcrxbufsize command to configure the data field size for Fibre Channel interfaces.
Cisco MDS 9000 Family Configuration Guide
11-16
Port WWN is 20:82:00:05:30:00:2a:1e
Peer port WWN is 20:42:00:0b:46:79:f1:80
Admin port mode is auto, trunk mode is on
Port mode is TE
Port vsan is 1
Speed is 2 Gbps
Transmit B2B Credit is 255
Receive B2B Credit is 1500
Receive data field Size is 2112
...
Purpose
Enters configuration mode.
Enables the extended BB_credits feature.
Disables (default) the extended BB_credits
feature.
Configures the specified interface.
Applies the extended BB_credit value of 1,500
credits to the selected interface. The valid range is
from 256 to 3,500 credits.
Clears the configured BB_credit configuration
for this port.
Displays the receive and transmit BB_credit
values along with other pertinent interface
information for this interface if the interface is in
the up state.
The receive BB_credit value reflects the
Note
extended BB_credit configuration, if
applicable.
Encapsulation is eisl
"Encapsulating Frames" section on page
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Chapter 11 Configuring Interfaces
) in the show interface
43-9).