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Page 38 | AlliedWare™ OS How To Note: EPSR
Debugging
The master node receives a Link-Down message on its secondary port (port 2) from transit
node B, which is at the other end of the broken link.
In the System field, this output shows the MAC address of the source of the message—the
transit node in this case.
The master switch responds to the break in the ring by sending a Ring-Down-Flush-FDB
message, which tells each transit node to learn the new topology. The master node also
unblocks its secondary port for the data VLAN (vlan2), flushes its FDB, sends an SNMP trap,
and changes the EPSR state to Failed. Note that the master node sends the Ring-Down-
Flush-FDB message only out its secondary port, because the link between the primary port
and the neighbouring transit node is down.
4. The master node receives a Link-Down message on its secondary port
EPSR Port2 Rx: 00e02b00 00040000 cd24024f 8100e3e8 005caaaa 0300e02b
00bb0100 00542484 00000000 0000cd24 024f990b 00400108 03e80000
00000000 cd24024f 00000000 04000000
EPSR Port2 Rx:
-----------------------------------------------------------------------
TYPE = LINK-DOWN STATE = LINK-DOWN
CTRL VLAN = 1000 SYSTEM = 00-00-cd-24-02-4f
HELLO TIME = 0 FAIL TIME = 0
HELLO SEQ = 0
-----------------------------------------------------------------------
5. The master node transmits a Ring-Down-Flush-FDB message
EPSR Port2 Tx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541ee9 00000000 0000cd28 0619990b 00400107 03e80000
00000000 cd280619 00000000 02000000
EPSR Port2 Tx:
-----------------------------------------------------------------------
TYPE = RING-DOWN-FLUSH-FDB STATE = FAILED
CTRL VLAN = 1000 SYSTEM = 00-00-cd-28-06-19
HELLO TIME = 0 FAIL TIME = 0
HELLO SEQ = 0
-----------------------------------------------------------------------
Unblock EPSR:test port:2 VLAN:2
Flush FDB EPSR: test vid: 2
EPSR INFO: Send trap EPSR:test oldState:COMPLETE newState:FAILED
nodeType:MASTER
EPSR test oldState:COMPLETE newState:FAILED