ORA-27303: additional information: requested interface eth1 mixed MTU configured 9000 1500

When you try install RAC. You can see error when ASM instance started

ASM1> sqlplus / as sysdba

SQL*Plus: Release 11.1.0.7.0 - Production on Thu Feb 24 21:57:34 2010

Copyright (c) 1982, 2008, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup
ORA-27504: IPC error creating OSD context
ORA-27300: OS system dependent operation:if MTU failed with status: 0
ORA-27301: OS failure message: Error 0
ORA-27302: failure occurred at: skgxpcini2
ORA-27303: additional information: requested interface eth1 mixed MTU configured 9000 1500
. Check output from ifconfig command
SQL>

It looks like 2 network devices (eth1 & eth2) are configured as cluster interconnect.

>/home/oracle/oracle/product/11.1.0/crs/bin> ./oifcfg getif
eth0 10.*.*.* global public
eth2 10.*.*.* global cluster_interconnect
eth1 10.*.*.* global cluster_interconnect

2. eth1 and eth2 are configured with different MTU sizes.
eth1 MTU=1500
eth2 MTU=9000
ACTION PLAN
===========
1. If your goal is to use both eth1 and eth2 for cluster interconnect, please set them
up with identical MTU sizes.

2. If only 1 interface is needed for cluster interconnect, please delete one of them.
$ cd <crs home>/bin
$ ./oifcfg delif -global <interface to be deleted>

Verify changes:
$ ./oifcfg getif