06-12-2007
Here is an interesting idea...
Does anyone know how to test if an ethernet interface is alive, or accepting connections? Here is the scenario - I have rsc and sc console interfaces on some Suns. There are some sporadic vulnerability scans that send them out to lunch when they run the scans. I have to login to the host and reset the console cards with the software installed on the host, but if the host gets honked up it is the wrong time to find out if my console connection isn't working.
So, I've been thinking about a script that could just check to make sure all of my consoles are alive and if not, I can reset them before something happens. Like maybe
for $IP
do
$some_way_to_check_consoles
done
This would be cool to see, either sh, csh, ksh, whatever!
D
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cvcd(1M) System Administration Commands cvcd(1M)
NAME
cvcd - virtual console daemon
SYNOPSIS
/platform/platform_name/cvcd
DESCRIPTION
The virtual console daemon, cvcd, is a server process that supports the network console provided on some platforms. The cvcd daemon accepts
network console connections from a remote host (only one host at any given time). Console input is read from this connection and forwarded
to cvc(7D) by way of cvcredir(7D).
Similarly, console output is read from cvcredir(7D) and forwarded across the network console connection. If cvcd dies, console traffic is
automatically rerouted through an internal hardware interface.
The cvcd daemon normally starts at system boot time. Each domain supports only one cvcd process at a time.
Caution: On Sun Enterprise 10000 domains, cvcd uses a configuration file (/etc/ssphostname) to determine the name of the host from
which network console connections are allowed. If the remote console host is renamed, you must edit the configuration file
to reflect that change.
OPERANDS
The following operands are supported:
platform_name The official Sun platform name used in packaging and code. For example, for Sun Fire 15K servers, the platform_name
would be SUNW,Sun-Fire-15000.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |Sun Enterprise 10000 |
| |servers, Sun Fire High-End |
| |Systems |
+-----------------------------+-----------------------------+
|Availability |SUNWcvc.u |
+-----------------------------+-----------------------------+
SEE ALSO
svcs(1), svcadm(1M), services(4), attributes(5), smf(5), cvc(7D), cvcredir(7D)
Sun Enterprise 10000 SSP Reference Manual
System Management Services (SMS) Reference Manual
NOTES
The cvcd service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/cvc
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
SunOS 5.10 11 Aug 2004 cvcd(1M)