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6. The Hello timer expires
The Hello timer expires, which would normally trigger the master node to send a Health
message out the primary port. However, the link between the primary port and the
neighbouring transit node is down, so the master node does not send the Health message.
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
7. The primary port comes back up
The primary port comes back up. The master node immediately blocks that port for vlan2 to
prevent a loop.
Manager x900-48-A>
EPSR test, Port 1 port up
Block EPSR:test port:1 VLAN:2
8. The Hello timer expires again
The Hello timer expires again. Port 1 is now up, so this time the master node sends a Health
message. The Health message shows that the EPSR state is Failed.
Note that the hello sequence number increments from the number it was before the primary
port went down, because the master node could not transmit Health messages while the
port was down.
Manager x900-48-A>
epsrHelloTimeout: EPSR test Hello Timer expired
EPSR Port1 Tx:
EPSR Port1 Tx:
-----------------------------------------------------------------------
-----------------------------------------------------------------------
Page 39 | AlliedWare™ OS How To Note: EPSR
00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541dee 00000000 0000cd28 0619990b 00400105 03e80000
00000000 cd280619 00010002 020000fa
TYPE = HEALTH
CTRL VLAN = 1000
HELLO TIME = 1
HELLO SEQ = 250
STATE = FAILED
SYSTEM = 00-00-cd-28-06-19
FAIL TIME = 2
Debugging
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