Connectrix MDS: IPStorage Interface was Down due to Port Software Failure

Summary: IPStorage interface was down due to Port software failure.

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Symptoms

Switch logs the below error message: 
'show logging log file':

2016 Aug 24 10:57:17 SPAY-FCIP01 %ETHPORT-5-IF_DOWN_SOFTWARE_FAILURE: Interface IPStorage1/1 is down (Port software failure)
2016 Aug 24 11:00:40 SPAY-FCIP01 %ETHPORT-5-IF_DOWN_SOFTWARE_FAILURE: Interface IPStorage1/1 is down (Port software failure)
2016 Aug 24 11:06:48 SPAY-FCIP01 %ETHPORT-5-IF_DOWN_SOFTWARE_FAILURE: Interface IPStorage1/1 is down (Port software failure)
2016 Aug 24 11:07:35 SPAY-FCIP01 %ETHPORT-5-IF_DOWN_SOFTWARE_FAILURE: Interface IPStorage1/1 is down (Port software failure)
  
'show interface brief':

switch: Switch-PR

--------------------------------------------------------------------------------
Interface                Status     IP Address        Speed    MTU   Port Channel
--------------------------------------------------------------------------------
IPStorage1/1             swFailure  172.xx.xxx.xxx/24  10 Gbps  1500  --


switch: Switch-DR

--------------------------------------------------------------------------------
Interface                Status     IP Address        Speed    MTU   Port Channel
--------------------------------------------------------------------------------
IPStorage1/1             up         10.xx.xxx.xx/30    10 Gbps  2300  --

Cause

The MTU is not identical on both switches. This parameter must be identical on both sides.
  • The default IP maximum transmission unit (MTU) frame size is 1500 bytes for all Ethernet ports.
  • The MTU is 1500 on switch 'Switch-PR', but it is 2300 on the peer switch 'Switch-DR'. 

Resolution

Change the MTU so as both ends have identical MTU values.

For example:
Run the below commands to change the MTU to 1500 on switch Switch-DR. 
configure terminal
interface IPStorage1/1
switchport mtu 1500
To recover software failure, reload the affected FCIP engine using the following hidden command: 
switch# ips reset module port
 
Note: This command is disruptive to all FCIP tunnels on the switch.

If the port still did not come up, a switch reboot is required.

Affected Products

Connectrix MDS-9250i

Products

Connectrix MDS-9250i, Connectrix MDS-Series Hardware, Connectrix MDS-Series Software
Article Properties
Article Number: 000064965
Article Type: Solution
Last Modified: 08 Oct 2025
Version:  3
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