There are three key things to consider when using the IPMI "lan"
interface:
1. Usually, you need to use an external machine to poll the desired
IPMI device. The same machine with the IPMI interface usually cannot
poll itself via the LAN interface
2. If the IPMI BMC is on a card that has a Ethernet port on it, you
*must* use that Ethernet port for IPMI traffic. Sometimes this
Ethernet port can also be used by the host but not always. Is the BMC
shares an on-motherboard Ethernet port, you *must* use eth0 on the
motherboard for IPMI communications. the lowest MAC address is usually
the one IPMI uses.
3. Many IPMI implementations that share an Ethernet port with the
system itself reuse the same MAC. They work by trapping the IPMI
packets from going to the host interface and send it to the BMC
instead. These IPMI configurations usually don't support the ability
to ping the IPMI address. I've found on some implementations, this
IPMI packet trapping is not very reliable and can require packet
filters on the host's interface to ignore any leaked IPMI packets going
to the host interface.
4. Don't mess around with manually setting ARPs, etc. Just make sure
you set up the IPMI interface via the "kcs" local interface with the
IP, netmask, default gateway, and sometimes, you have you hard-code the
DGW MAC.
--
IPMI commands: lan print 1
Set in Progress : Set Complete
Auth Type Support : NONE MD2 MD5 PASSWORD
Auth Type Enable : Callback : MD2 MD5 PASSWORD
: User : MD2 MD5 PASSWORD
: Operator : MD2 MD5 PASSWORD
: Admin : MD2 MD5 PASSWORD
: OEM : MD2 MD5 PASSWORD
IP Address Source : Static Address
IP Address : 10.159.4.230
Subnet Mask : 255.255.248.0
MAC Address : 00:30:48:8c:ca:59
SNMP Community String : lab
IP Header : TTL=0x40 Flags=0x40 Precedence=0x00 TOS=0x10
BMC ARP Control : ARP Responses Enabled, Gratuitous ARP Enabled
Gratituous ARP Intrvl : 2.0 seconds
Default Gateway IP : 10.159.4.1
Default Gateway MAC : 00:10:db:ff:20:c0
Backup Gateway IP : 0.0.0.0
Backup Gateway MAC : 00:00:00:00:00:00
802.1q VLAN ID : Disabled
802.1q VLAN Priority : 0
RMCP+ Cipher Suites : 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14
Cipher Suite Priv Max : Xaaaaaaaaaaaaaa
: X=Cipher Suite Unused
: c=CALLBACK
: u=USER
: o=OPERATOR
: a=ADMIN
: O=OEM
--
--David
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Fred Skrotzki wrote:
You've not said who's hardware you are using so it is hard to
determine
if you are doing something right or wrong as some have quirks that
others do not.
The OS settings and ethernet interface used on the machine have
nothing
to do with the BMC's settings (and should not if you think about it).
It should be a totally separate system so that you can place it in out
of band if needed. In the lan print 2 statement you provided you can
see that the default gateway IP is not on the same subnet, it needs to
be. Depending on implementation it is possible it considers this a
huge
error and will not configure the port properly until it if fixed. We
have several systems here where if it is not defined right it just
does
not work.
Also in most systems (not all but 90% ish) you can not use the
machine's
network interface to get to the same machines BMC external IP if they
use the same physical port. If they are using different ports then
yes.
Dell for example uses the first eth port for both the BMC and OS level
eth. They are stacked on each other and there is not a small buildin
switch connecting them. So the OS Nic's transmit pair is directly
connected to the BMC's Transmit pair and wired out so one can't hear
the
other. You can't go out that interface to come back in, it just does
not work.
Excuse me Fred, I don't want to be boring, but I'm going to be crazy :/
After a lot of trials, without luck, I try to explain the situation, so
that it will be possible, and I hope easy, to give some advice.
The machine where I have a BMC controller has two NICs:
eth0:
ip -> A.B.C.D
MAC -> 00:15:60:ED:DA:CE
eth1:
ip -> 10.0.2.245
MAC -> 00:15:60:ED:DA:CF
the eth1 iface is the NIC that I want to connect to, but I tried to use
also the eth0 iface.
When I run bmclanconf, the MAC address is always setted to
00:15:60:ed:dd:62.
Now, I tried each possible configuration (on eth0 and eth1).
* I tried to set the lan channel with the same ip of my NICs.
* I tried to set the lan channel with a third ip. In this case, I tried
also to force the arp table of the client, where I try to run
`ipmitool -I lan...`:
arp -s 10.0.2.13 00:15:60:ed:dd:62 -i eth1
or, when using eth0:
arp -s A.B.C.E 00:15:60:ed:dd:62 -i eth0
Multiple gateway addresses has been tested with each configuration.
The result is always the same: connection is not established.
Both ipmitool and ipmiping are failing.
The machine is a HP DL 140, and `dmesg` shows:
[ 0.420783] IPMI System Interface driver.
[ 0.420839] ipmi_si: Trying SMBIOS-specified KCS state machine at
memory address 0xca2, slave address 0x20, irq 0
[ 0.420909] Could not set up I/O space
[ 0.864879] ipmi: Found new BMC (man_id: 0x000f85, prod_id: 0x0000,
dev_id: 0x00)
[ 0.864983] IPMI KCS interface initialized
[ 0.865034] ipmi_si: Found default KCS state machine at I/O address
0xca2
[ 0.865089] Copyright (C) 2004 MontaVista Software - IPMI Powerdown
via sys_reboot.
[ 0.886055] IPMI poweroff: Found a chassis style poweroff function
I'm thinking to buy some hardware switch, with a web interface to
control my remote machine, but I'm wondering if, failing ipmitool, also
the hardware switch will fail.
For now, thanks a lot for your helps
br
- --
efphe
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