Created attachment 475646 [details]
patch file that fixes the issue locally

Description of problem:
improper handling of MTU variable in /etc/sysconfig/network-scripts/ifup-ib

Version-Release number of selected component (if applicable):
$ rpm -qf ifup-ib
openib-1.4.1-5.el5

OS version info:
[root@pc-mgw30 ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.5 (Tikanga)

[root@pc-mgw30 ~]# uname -r
2.6.33.7-rt29.45.el5rt


How reproducible:
always

Steps to Reproduce:
1. ifdown ib0
2. ifup ib0

  
Actual results:
Bringing up interface ib0:  /etc/sysconfig/network-scripts/ifup-ib: line 79: [: too many arguments [  OK  ]
Bringing up interface ib1:  /etc/sysconfig/network-scripts/ifup-ib: line 79: [: too many arguments [  OK  ]


Expected results:
Bringing up interface ib0:  [  OK  ]
Bringing up interface ib1:  [  OK  ]



Additional info:
attaching a patch that resolves the issue on a local host