05-13-2012
If you did primary development on an app, find out who owns it now, talk with them.
Or find out which customers still have it as a legacy app. Check them out as well.
A huge amount changed between then and now. And most of it is network-related, critical to business infrastructure. So, learn it. Get Cisco certification (or whatever you worked with before) Don't go out and try to get Linux cert if you never worked on it before.
The combination of older experience and certification with what you had previous experience (modern version) with will be sufficient to get an entry-level position.
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LEARN ABOUT CENTOS
lldptool-app
lldptool(8) Linux lldptool(8)
NAME
APP - Show / manipulate APP TLV configuration
SYNOPSIS
lldptool -t -i ethx -V APP [-c app]
lldptool -T -i ethx -V APP [-d] app=prio,sel,pid
DESCRIPTION
The APP TLV is an informational TLV and will advertise the current configured application table. If the peer APP TLV and a local APP TLV
match the same selector and protocol field the local parameter is used.
ARGUMENTS
app Configures a local application data field using the three parameters: priority (prio), selector (sel), and protocol (pid). The -d
option can be provided to remove an entry which matches the three parameters.
Theory of Operations
The APP TLV is an informational TLV for most end stations. It is not expected that setting APP data should be required. Peer data will be
processed and added to the application data table by default assuming there does not already exist a local entry with matching selector and
priority fields.
By adding APP data to the application table it is available for applications, eg iscsid, to query. Applications query for a specific proto-
col and selector and may use this data to map traffic to the corresponding traffic class.
EXAMPLE & USAGE
Configure ISCSI application for priority 4 on eth2
lldptool -T -i eth2 -V APP app=4,2,3260
Configure FCoE application for priority 3 on eth2
lldptool -T -i eth2 -V APP app=3,1,35078
Remove FCoE application for priority 3 on eth2
lldptool -T -i eth2 -V APP -d app=3,1,35078
Display locally configured application table on eth2
lldptool -t -i eth2 -V APP -c app
Display last transmitted APP TLV on eth2
lldptool -t -i eth2 -V APP
SOURCE
o IEEE 802.1Qaz (http://www.ieee802.org/1/pages/dcbridges.html)
SEE ALSO
lldptool(8), lldpad(8)
AUTHOR
John Fastabend
open-lldp February 2010 lldptool(8)