Allied Telesis AlliedWare OS - Manual (Page 55)

Page 55 | AlliedWare™ OS How To Note: EPSR
Debugging
The transit node receives Health messages from the master node. These have a state of
Failed, which shows that the ring is still broken.
This is the packet shown in step 6 on page 50 of the master node debug output.
The transit node detects that the broken link has come back up. It blocks the port to prevent
a loop from occurring, sends a trap, and changes the EPSR state to Pre-forwarding.
The transit node receives another Health message. This message will make it back to the
master node’s secondary port, because the link between the two transit nodes is now up.
This is the packet shown in step 7 on page 50 of the master node debug output.
5. The transit node receives Health messages
Manager 9924-B>
EPSR Port1 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541d9f 00000000 0000cd28 0619990b 00400105 03e80000 00000000
cd280619 00010002 02000149
EPSR Port1 Rx:
-----------------------------------------------------------------------
TYPE = HEALTH STATE = FAILED
CTRL VLAN = 1000 SYSTEM = 00-00-cd-28-06-19
HELLO TIME = 1 FAIL TIME = 2
HELLO SEQ = 329
-----------------------------------------------------------------------
.
.
.
6. The link comes back up
Manager 9924-B>
Block EPSR:test port:2 VLAN:2
EPSR test, Port 2 port up
EPSR INFO: Send trap EPSR:test oldState:LINK-DOWN newState:PRE-FORWARDING
nodeType:TRANSIT
EPSR test oldState:LINK-DOWN newState:PRE-FORWARDING
7. The transit node receives another Health message
Manager 9924-B>
EPSR Port1 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b
00bb0100 00541d72 00000000 0000cd28 0619990b 00400105 03e80000 00000000
cd280619 00010002 02000176
EPSR Port1 Rx:
-----------------------------------------------------------------------
TYPE = HEALTH STATE = FAILED
CTRL VLAN = 1000 SYSTEM = 00-00-cd-28-06-19
HELLO TIME = 1 FAIL TIME = 2
HELLO SEQ = 374
-----------------------------------------------------------------------