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Description of problem:
We are booting from iscsi but there is no way to change the mtu within the intel iscsi bios.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Setup Switch and NAS to use an MTU=8192
2. Configure Intel X540T2 for iscsi boot
3. Install RHEL6 on iscsi disk
4. Update ifcfg-eth0 to set MTU=8192

Actual results:
interfaces has MTU=1500

Expected results:
interfaces has MTU=8192

Additional info:

We have solved it currently by adding the required command "ip link set dev eth0 mtu 8192" to rc.sysinit (I know dirty a hack).

If you have / on iscsi this should be probably set earlier in dracut.

You are right, but the dracut version does not support setting the mtu for a ibft interface.  Something like "ip=eth0:ibft:8192:<mac-address>" would be the best way to go.

We tried to use the entry below, until we realized that is not supported:

> http://man7.org/linux/man-pages/man7/dracut.cmdline.7.html
>    ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|ibft}:[:[<mtu>][:<macaddr>]]

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0954.html