Cisco Catalyst Switch Auto-MDIX Tests

1st End	2nd End	Cable	Result
C3500XL (Non Auto-MDIX)	C3750X (Auto-MDIX)	Straight Through	LINK UP
C3500XL (Non Auto-MDIX)	C3750X (Auto-MDIX)	Crossover	LINK UP
C3500XL (Non Auto-MDIX)	C6500 WS-X6748-GE-TX (Auto-MDIX)	Straight Through	LINK UP
C3500XL (Non Auto-MDIX)	C6500 WS-X6748-GE-TX (Auto-MDIX)	Crossover	LINK UP
C3750X (Auto-MDIX)	C6500 WS-X6748-GE-TX (Auto-MDIX)	Straight Through	LINK UP
C3750X (Auto-MDIX)	C6500 WS-X6748-GE-TX (Auto-MDIX)	Crossover	LINK UP

Additional Notes:
As long as one end is Auto-MDIX enabled, LINK UP regardless of the cable types.

C6500#sh mod
Mod Ports Card Type                              Model              Serial No.
--- ----- -------------------------------------- ------------------ -----------
  1   48  CEF720 48 port 10/100/1000mb Ethernet  WS-X6748-GE-TX     SAL12437L89
  5    5  Supervisor Engine 720 10GE (Active)    VS-S720-10G        SAL12362KCB

Mod MAC addresses                       Hw    Fw           Sw           Status
--- ---------------------------------- ------ ------------ ------------ -------
  1  0023.5e08.c8b0 to 0023.5e08.c8df   3.0   12.2(18r)S1  12.2(33)SXH7 Ok
  5  001c.58d0.e2e4 to 001c.58d0.e2eb   2.0   8.5(2)       12.2(33)SXH7 Ok

Mod  Sub-Module                  Model              Serial       Hw     Status
---- --------------------------- ------------------ ----------- ------- -------
  1  Centralized Forwarding Card WS-F6700-CFC       SAL12426HXD  4.1    Ok
  5  Policy Feature Card 3       VS-F6K-PFC3C       SAL12372PSP  1.0    Ok
  5  MSFC3 Daughterboard         VS-F6K-MSFC3       SAL12362M05  1.0    Ok

Mod  Online Diag Status
---- -------------------
  1  Pass
  5  Pass
C6500#
C6500#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C6500(config)#int gi1/1
C6500(config-if)#mdix ?
  auto  Enable automatic MDI crossover detection on this interface

C6500(config-if)#mdix auto ?
  <cr>

C6500(config-if)#mdix auto
C6500(config-if)#do sh run int gi1/1
Building configuration...

Current configuration : 61 bytes
!
interface GigabitEthernet1/1
 no ip address
 shutdown
end

C6500(config-if)#
C6500(config-if)#no mdix ?
  <cr>

C6500(config-if)#no mdix
C6500(config-if)#do sh run int gi1/1
Building configuration...

Current configuration : 75 bytes
!
interface GigabitEthernet1/1
 no ip address
 shutdown
 no mdix auto
end

C6500(config-if)#

C3750X#sh int gi1/0/1 capabilities
GigabitEthernet1/0/1
  Model:                 WS-C3750X-48
  Type:                  10/100/1000BaseTX
  Speed:                 10,100,1000,auto
  Duplex:                half,full,auto
  Trunk encap. type:     802.1Q,ISL
  Trunk mode:            on,off,desirable,nonegotiate
  Channel:               yes
  Broadcast suppression: percentage(0-100)
  Flowcontrol:           rx-(off,on,desired),tx-(none)
  Fast Start:            yes
  QoS scheduling:        rx-(not configurable on per port basis),
                         tx-(4q3t) (3t: Two configurable values and one fixed.)
  CoS rewrite:           yes
  ToS rewrite:           yes
  UDLD:                  yes
  Inline power:          no
  SPAN:                  source/destination
  PortSecure:            yes
  Dot1x:                 yes
C3750X#
C3750X#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C3750X(config)#int gi1/0/1
C3750X(config-if)#mdix ?
  auto  Enable automatic MDI crossover detection on this interface

C3750X(config-if)#mdix auto ?
  <cr>

C3750X(config-if)#mdix auto
C3750X(config-if)#do sh run int gi1/0/1
Building configuration...

Current configuration : 38 bytes
!
interface GigabitEthernet1/0/1
end

C3750X(config-if)#
C3750X(config-if)#no mdix ?
  auto  Enable automatic MDI crossover detection on this interface

C3750X(config-if)#no mdix auto ?
  <cr>

C3750X(config-if)#no mdix auto
C3750X(config-if)#do sh run int gi1/0/1
Building configuration...

Current configuration : 52 bytes
!
interface GigabitEthernet1/0/1
 no mdix auto
end

C3750X(config-if)#