[Users] ibdump and mtu size

[Amir Shehata]

Hello,

I'm trying to use ibdump to capture ib traffic.  However it complains that
it needs MTU size set to 2K.

using ibv_devinfo I get
[root at eagle-41 ~]# ibv_devinfo
hca_id: mlx4_0
        transport:                      InfiniBand (0)
        fw_ver:                         2.7.000
        node_guid:                      0025:90ff:ff1b:9e9c
        sys_image_guid:                 0025:90ff:ff1b:9e9f
        vendor_id:                      0x02c9
        vendor_part_id:                 26428
        hw_ver:                         0xB0
        board_id:                       SM_2122000001000
        phys_port_cnt:                  1
                port:   1
                        state:                  PORT_ACTIVE (4)
                        max_mtu:                4096 (5)
                        active_mtu:             4096 (5)
                        sm_lid:                 35
                        port_lid:               22
                        port_lmc:               0x00
                        link_layer:             InfiniBand

max and active mtu is 4096.

The ifconfig shows mtu to be 2044.  However, I believe the ibdump is
looking at the port mtu.

How can I change the port mtu to 2044 so I can get ibdump to work?

Is there a way to get ibdump to accept more than 2044 (IE 4096)?  I
couldn't find a way to do it.

any ideas would be much appreciated.

thanks
amir
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openfabrics.org/pipermail/users/attachments/20150409/4779aaf4/attachment.html>