Hello!
This is with oi_151a2 on a HP DL360 G7 with a "592520-B21 HP IB 4X QDR
CX-2 PCI-e G2 Dual Port HCA".
I'm trying to set the MTU to the same on this host as it is on the
existing nodes on the IB network.
Setting it with ifconfig goes through, but "dladm show-linkprop -p mtu"
still says it's 65520.
How to make the MTU setting persistent? If it's only set with ifconfig
is it actually using the specified MTU?
http://docs.oracle.com/cd/E23824_01/html/821-1475/ibp-7d.html
Refers to a /kernel/drv/ibp.conf
But this file is quite empty.
---
root@oi:~# dladm create-part -l ibp0 -p mtu=2044 -P FFFF pFFFF.ibp0
dladm: partition ffff creation over ibp0 failed: operation not supported
root@oi:~# dladm create-part -l ibp0 -P FFFF pFFFF.ibp0
root@oi:~# ifconfig pFFF.ibp0 plumb
root@oi:~# dladm show-link
LINK CLASS MTU STATE BRIDGE OVER
ibp0 phys 65520 up -- --
ibp1 phys 65520 up -- --
bnx0 phys 1500 up -- --
bnx2 phys 1500 down -- --
bnx3 phys 1500 down -- --
bnx1 phys 1500 down -- --
pFFFF.ibp0 part 65520 up -- ibp0
root@oi:~# ifconfig pFFFF.ibp0 10.0.0.1 netmask 255.255.255.0 mtu 2044 up
root@oi:~# ifconfig pFFFF.ibp0
pFFFF.ibp0:
flags=1001000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,FIXEDMTU> mtu 2044
index 4
inet 10.0.0.1 netmask fffffc00 broadcast 10.0.0.255
ipib 80:0:0:4a:fe:80:0:0:0:0:0:0:0:2:c9:3:0:4c:7f:f1
root@oi:~# dladm set-linkprop -p mtu=2044 pFFFF.ibp0
dladm: warning: cannot set link property 'mtu' on 'pFFFF.ibp0':
operation not supported
root@oi:~# dladm show-linkprop -p mtu
LINK PROPERTY PERM VALUE DEFAULT POSSIBLE
ibp0 mtu r- 65520 65520 1500-65520
ibp1 mtu r- 65520 65520 1500-65520
bnx0 mtu rw 1500 1500 1500
bnx2 mtu rw 1500 1500 1500
bnx3 mtu rw 1500 1500 1500
bnx1 mtu rw 1500 1500 1500
pFFFF.ibp0 mtu r- 65520 65520 65520
Connectivity works fine (can ping another host over IPoIB).
--
Johan Guldmyr
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