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Ibswitches do not show FQDN (Fully Qualified Domain Name)

Applies to:

Goal

 On new hardware, ibswitches do no longer show FQDN (Fully Qualified Domain Name)

Switch  : 0x0010e035b956a0a0 ports 36 "SUN DCS 36P QDR sw-ib1 10.6.139.59" enhanced port 0 lid 3 lmc 0
Switch  : 0x0010e035b84da0a0 ports 36 "SUN DCS 36P QDR sw-ib3 10.6.139.61" enhanced port 0 lid 1 lmc 0
Switch  : 0x0010e035c10ba0a0 ports 36 "SUN DCS 36P QDR sw-ib2 10.6.139.60" enhanced port 0 lid 2 lmc 0


While uname -a from the switch, shows as fully qualified

# uname -a
Linux x17psw-ib1.svr.us.company.net 2.6.27.13-nm2 #1 SMP Thu Feb 5 20:25:23 CET 2009 i686 i686 i386 GNU/Linux

This is different from other installation at the same site, which show FQDN

# ibswitches
Switch  : 0x002128f57308a0a0 ports 36 "SUN DCS 36P QDR sw-ib1.svr.emea.company.net" enhanced port 0 lid 2 lmc 0
Switch  : 0x002128f57334a0a0 ports 36 "SUN DCS 36P QDR sw-ib2.svr.emea.company.net" enhanced port 0 lid 3 lmc 0
Switch  : 0x002128f5734ba0a0 ports 36 "SUN DCS 36P QDR sw-ib3.svr.emea.company.net" enhanced port 0 lid 1 lmc 0

The following files are set up correctly:

cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
10.6.139.117    sw-ib1.svr.us.company.net  x18tsw-ib1

# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=sw-ib1.svr.us.company.net

Solution

Per Engineering, this is a change that came with a firmware upgrade.

Here is the explanation of the change from the 1.3 release:

The Node description is auto generated based on the hostname and the IP address of the Management Controller of the IB switch, and you should not change that since some of the CLI commands in the IB switch depends of the format of the Node description.

The change done in Node description from firmware 1.3 to firmware 2.1 (the firmware version 2.0 actually is the first firmware with this change), was to add IP address as part of node description to be more equal to node description of nodes in engineered systems which also use IP address as part of node description.

Due to length limitation of an IB node description, we could not have both Fully Qualified Domain Name (FQDN) and IP address as part of node description, so therefore only host name is used.
 

References

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