Env:
AIX 4.1.4
RISC E20
sysback 3.3.3.9
Desc:
Customer does a network boot from a token-ring (tok0)
then choose option 1 and choose to change the input device
from tok0 to ent1.
The customer then choose option 2 (it failes on option 3 as well)
He gets this error message:
*********************************
* Configuring network *
*********************************
Could not bring up network on en0.
.
Press Enter to return to main menu ..
That error message is very strange, because he was trying to use ent1
(not ent0) to install.
Action:
I investigated into /usr/lpp/sysback/sysnet and I found (using set -x)
where the problem was located. At line 481, the following piece of
code is executed:
----------------------------------------------------------------------
\# Bring up and configure network interface
if ¦ $netdev != $BOOTDEV ¦
then
if ¦ "$subnetmask" != undefined ¦
then ifconfig $ifconfigname inet $cIPaddr up netmask
$subnetmask \\
2>/dev/null
else ifconfig $ifconfigname inet $cIPaddr up 2>/dev/null
fi
fi
rc=$?
----------------------------------------------------------------------
At that point:
$netdev = ent1
$BOOTDEV = ent0
$subnetmask = 255.255.255.0
$cIPaddr = 192.168.129.15
$ifconfigname = (empty string)
So the following command is executed:
ifconfig inet 192.168.129.15 up netmask 255.255.255.0
and this command fails with rc=1. It is obvious that the error is due
to the empty value of $ifconfigname.
I further investigated into /usr/lpp/sysback/sysnet at line 377.
-----------------------------------------------------------------------
\# Get network install device info
cat /tmp/..netinfo | read netdev cIPaddr sIPaddr subnetmask gIPaddr
ringspeed \\
entif entconnect
\# Gateway?
if ¦ "$gIPaddr" = "undefined" ¦
then gateway=no
else gateway=yes
fi
\# Get network interface
case $netdev in
ent*) ifconfigname=$entif;;
tok*) ifconfigname=tr`expr "$netdev" : "tok\\(.*\\)"`;;
esac
-----------------------------------------------------------------------
ifconfigname is set to $entif, which is itself read from
/tmp/..netinfo.
.
I inserted a "cat /tmp/..netinfo; sleep 30" at that point, and here
is the output shown:
-----------------------------------------------------------------------
ent1 192.168.129.15 192.168.129.41 255.255.255.0 192.168.129.41 en0
-----------------------------------------------------------------------
I think that there are 2 problems here:
- the 6th field (Ring Speed in case of Token Ring) was not written in
/tmp/..netinfo;
- en0 should be en1.
This missing field explains why $entif is empty.
.
As that file is created in /usr/lpp/sysback/inst/sysmenus, I looked
into that file, inside the changenet() function (line 88 and after).
.
At the beginning of that function, /tmp/..netinfo already exists and
contains the values used during the network boot (IP client, IP server,
IP gateway, netmask, ...). I inserted a "cat /tmp/..netinfo;sleep 30"
at that point, and here is the output shown:
-----------------------------------------------------------------------
ent0 139.165.32.33 139.165.32.13 255.255.255.0 139.165.32.13 en0
-----------------------------------------------------------------------
Here, there are 2 space characters between "139.165.32.13" and
"en0". I think that the /tmp/..netinfo file that is created at boot
time is not correct: the 6th field was not written. "en0" is correct
at that point, since the boot process was achieved using ent0...
So I could conclude that there is a bug inside the
/usr/lpp/sysback/netinst/boot4 script. I looked into that file, at
line 212 and after:
-----------------------------------------------------------------------
\# Create install image server info file
¦ -z "$SUBMASK" ¦ && SUBMASK=undefined
echo "$PHY_BOOT_DEV $CLIENT_IPADDR $INSTSRV $SUBMASK $INSTGATE
$RINGSPEED $LDEV $ENTCON" > /tmp/..netinfo
-----------------------------------------------------------------------
If I compare the last line with the content of the /tmp/..netinfo file,
I can conclude that RINGSPEED and ENTCON were both empty strings.
.
In the same script, I can see that the values of RINGSPEED and ENTCON
should be set at line 65 and after:
-----------------------------------------------------------------------
\# Get network adapter attributes
case "$HTYPE" in
79) \# 'O' = token-ring
if ¦ "$HATTR" -eq 3 -o "$HATTR" -eq 5 ¦
then RINGSPEED=16
else RINGSPEED=4
fi
ENTCON=0
;;
68) \# 'D' = ethernet
enet_type=`odmget -q name="$PHY_BOOT_DEV" CuDv`
RINGSPEED=0
case "$enet_type" in
*ethernet*)
\# Standard ethernet
if ¦ "$HATTR" -eq 7 ¦
then ENTCON=bnc
else ENTCON=dix
fi
;;
*) \# Integrated ethernet
ENTCON=0
;;
esac
;;
esac
-----------------------------------------------------------------------
It seems obvious that the problem is due to the value of HTYPE
that is neither 79, neither 68. Indeed, if HTYPE was 68, RINGSPEED
and ENTCON would have been set to 0.
.
I inserted "echo $HTYPE > /tmp/..htype" in that script, rebuild the
boot image, and "cat" that file. The value of HTYPE is 0 !!!!!!
.
Then I investigated in the same script at line 146 and after:
-----------------------------------------------------------------------
\# Read IPL control block for network information
set -- `bootinfo -c
CLIENT_IPADDR=$1
BOOT_SERV_IP=$2
BOOT_GATE_IP=$3
HTYPE=$4
-----------------------------------------------------------------------
It appears that $HTYPE depends on the result of "bootinfo -c".
.
I inserted "bootinfo -c > /tmp/..bootinfo" in that script, rebuild the
boot image, and "cat" that file. Here is the result:
-----------------------------------------------------------------------
139.165.32.33 139.165.32.13 139.165.32.13 0 0 0 /tftpboot/eden
1.4.255.255.255.0.0.0.0.0..(total=59 "0" characters)..0.0.0. 0
-----------------------------------------------------------------------
My final conclusion is that rc.boot4 (and maybe also rc.boot3) must
be fixed so that it (they) take(s) into account that kind of
"bootinfo -c" result.
.
A workaround for our problem is adding the following lines before
the "esac" that matches "case $HTYPE":
-----------------------------------------------------------------------
0) \# E20 model Ethernet card
RINGSPEED=0
ENTCON=0
;;
-----------------------------------------------------------------------
This fixes (temporarily?) the first problem.
For the second problem, I found a bug inside
/usr/lpp/sysback/inst/sysmenus, at line 110 and after (inside the
changenet() function):
-----------------------------------------------------------------------
\# Get current settings
cat /tmp/..netinfo | read olddev clientIP serverIP subnet \\
gatewayIP ringspeed ent_if
ent_con
-----------------------------------------------------------------------
I can see that ent_if is read from /tmp/..netinfo and remains unchanged
if we do not change the type of Ethernet interface (using choice *5*
in the menu).
However, the changenet() function is called whenever the user selects
another interface for the restore (in my case, $device = ent1). So,
ent_if must be changed into the corresponding value for that interface.
I added the following lines after the lines I just mentioned above:
-----------------------------------------------------------------------
if ¦¦ $device = ent* ¦¦
then if ¦¦ $ent_if = et* ¦¦
then ent_if=et$devno
else ent_if=en$devno
fi
fi
-----------------------------------------------------------------------
This is fixed in sysback 3.3.3.10
Next Action:
Sending sysback 3.3.3.10 to the customer
Support Line: Could not bring up network on en0. ITEM: BQ2842L
Dated: November 1996 Category: N/A
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