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Page 36 | AlliedWare™ OS How To Note: EPSR
Debugging
Debugging
This section walks you through the EPSR debugging output as links go down and come back
up again. The debugging output comes from the ring in "Example
1
: A Basic Ring" on page 11.
The output shows what happened when we took down two separate links in turn:
• first, the link between the master node’s primary port and transit node B
• second, the link between the two transit nodes B and C
To enable debugging on the domain called “test”, use the command:
enable epsr=test debug=all
Note that the master node transmits Health messages every second by default. The
debugging displays every message, including all Health messages. Therefore, we recommend
that you capture the debugging output for separate analysis, to make analysis simpler.
Link Down Between Master Node and Transit Node
This section shows the debugging output when the link between the master node’s primary
port and transit node B goes down and comes back up again. It shows the debugging output
for the complete failure and recovery cycle:
• first on the master node
• then on transit node B.
Master Node (Node A) Debug Output
The following debugging output starts with the ring established and in a state of Complete.
Each time the Hello timer expires, the master node sends a Health message out its primary
port (port
1
). As long as the ring is in a state of Complete, it receives each Health message
again on its secondary port (port 2). Note that in the System field, this output shows the
MAC address of the source of the message—the master node in this case.
1. The master node sends Health messages
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
EPSR Port1 Tx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541f2a 00000000 0000cd28 0619990b 00400105 03e80000
00000000 cd280619 00010002 010000be
EPSR Port1 Tx:
-----------------------------------------------------------------------
TYPE = HEALTH STATE = COMPLETE
CTRL VLAN = 1000 SYSTEM = 00-00-cd-28-06-19
HELLO TIME = 1 FAIL TIME = 2
HELLO SEQ = 190
-----------------------------------------------------------------------
EPSR Port2 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541f2a 00000000 0000cd28 0619990b 00400105 03e80000
00000000 cd280619 00010002 010000be
EPSR Port2 Rx:
-----------------------------------------------------------------------
TYPE = HEALTH STATE = COMPLETE
CTRL VLAN = 1000 SYSTEM = 00-00-cd-28-06-19
HELLO TIME = 1 FAIL TIME = 2
HELLO SEQ = 190
-----------------------------------------------------------------------