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Allied Telesis AT-9924T-40 The master node receives a Link-Down message on its secondary port

Models: AT-9924SP-30 AT-9924T-40 AT-8948 AT-9924T/4SP-A-20 X900-48FE-N

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4.The master node receives a Link-Down message on its secondary port

Debugging

4.The master node receives a Link-Down message on its secondary port

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.

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

-----------------------------------------------------------------------

In the System field, this output shows the MAC address of the source of the message—the transit node in this case.

5.The master node transmits a Ring-Down-Flush-FDB message

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.

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

Page 38 AlliedWare™ OS How To Note: EPSR

Image 38

Allied Telesis AT-9924T-40, X900-48FE-N, AT-8948 manual The master node receives a Link-Down message on its secondary port

Contents

Introduction Detecting a Fault on page Recovering from a Fault on pageHow To Configure EPSR on page Example 1 A Basic Ring on page What information will you find in this document?EPSR State and Settings on page SNMP Traps on page Counters on page Ports and Recovery Times on pageIGMP Snooping and Recovery Times on page Which products and software versions does it apply to?How EPSR Works EPSR ComponentsEstablishing a Ring Page 4 AlliedWare OS How To Note EPSRMaster Node States Recovering from a FaultFault in a link or a transit node Transit Node StatesFault in the master node Transit Nodes with One Port Down Restoring Normal OperationMaster Node Transit Nodes with Both Ports Down1. Connect your switches into a ring How To Configure EPSRConfiguring EPSR 2. On each switch, configure EPSRv. Enable EPSR iii. Remove the ring ports from the default VLANiv. Configure the EPSR domain 3. Configure other ports and protocols as requiredModifying the Control VLAN Page 10 AlliedWare OS How To Note EPSR1. Create the control VLAN Configure the Master Node AExample 1 A Basic Ring 2. Add the ring ports to the control VLAN8. Enable EPSR Configure the Transit Nodes B and C5. Remove the ring ports from the default VLAN 6. Create the EPSR domain6. Create the EPSR domain 8. Enable EPSRPage 13 AlliedWare OS How To Note EPSR 7. Add the data VLAN to the domainDomain 1. Configure the master node switch A for domainExample 2 A Double Ring diagram4. Configure the transit node switch D that belongs just to domain 2. Configure the transit node switch B that belongs just to domain3. Configure the master node switch C for domain Page 15 AlliedWare OS How To Note EPSR5. Configure the transit node switch E that belongs to both domains Page 16 AlliedWare OS How To Note EPSRRSTP 1. Configure the master node switch A for the EPSR domainExample 3 EPSR and RSTP DomainRemove the STP VLAN’s ports from the default VLAN Switches C and D have the same configuration in this exampleConfigure the STP VLAN Configure STP4. Configure switch E for EPSR and RSTP Page 19 AlliedWare OS How To Note EPSRExample 4 EPSR with Nested VLANs EPSR Domain1. Configure the master node switch A for the EPSR domain Page 21 AlliedWare OS How To Note EPSR5. Configure client switch G connected to transit node C 3. Configure client switch E connected to the master node4. Configure client switch F connected to transit node B 6. Configure client switch H connected to transit node DExample 5 EPSR with management stacking Example 5 EPSR with management stacking3. Configure stacking on the second transit node host3 1. Configure stacking on the master node for the EPSR domain host12. Configure stacking on the first transit node host2 Page 24 AlliedWare OS How To Note EPSR4. Configure the other VLANs on the stacked switches 5. Configure EPSR on the stacked switchesConfigure the AT-TN7100 iMAP as Master Node Example 6 EPSR with an iMAPshow epsr Checking the Master Node ConfigurationPage 27 AlliedWare OS How To Note EPSR show epsr=testPage 28 AlliedWare OS How To Note EPSR Configure the AT-TN7100 iMAP as a Transit NodeChecking the Transit Node Configuration Example 6 EPSR with an iMAPClassifiers and Hardware Filters Classifiers and Hardware FiltersPorts and Recovery Times set igmpsnooping vlan=vlan-name1..4094all querysolicit=onyestrue IGMP Snooping and Recovery TimesHealth Message Priority Transit Node in a Complete Ring EPSR State and SettingsMaster Node in a Complete Ring EPSR State and Settings Page 33 AlliedWare OS How To Note EPSRSNMP Traps Transit Node in a ring that had failures CountersMaster node in aComplete ring Master Node Node A Debug Output DebuggingLink Down Between Master Node and Transit Node 1. The master node sends Health messagesPage 37 AlliedWare OS How To Note EPSR 2. The master node continues sending Health messages3. The primary port goes down DebuggingPage 38 AlliedWare OS How To Note EPSR 4. The master node receives a Link-Down message on its secondary port5. The master node transmits a Ring-Down-Flush-FDB message 7. The primary port comes back up 6. The Hello timer expires8. The Hello timer expires again Page 39 AlliedWare OS How To Note EPSR11. The master node receives the Ring-Up-Flush-FDB message on port 9. The master node receives the Health message on its secondary port10. The master node returns the ring to a state of Complete Page 40 AlliedWare OS How To Note EPSRDebugging 12. The master node transmits and receives Health messagesPage 41 AlliedWare OS How To Note EPSR Transit Node Node B Debug Output 1. The transit node receives Health messagesPage 43 AlliedWare OS How To Note EPSR 2. Port 1 on the transit node goes down3. The transit node receives a Ring-Down-Flush-FDB message Page 44 AlliedWare OS How To Note EPSR 4. Port 1 comes back up5. Transit node receives a Health message 6. Transit node receives a Ring-Up-Flush-FDB message Page 45 AlliedWare OS How To Note EPSR7. The transit node receives Health messages Page 46 AlliedWare OS How To Note EPSRMaster Node Node A Debug Output Link Down Between Two Transit Nodeson the master node, and then on transit node B 1. The master node sends Health messagesPage 48 AlliedWare OS How To Note EPSR 2. The link between the two transit nodes goes down3. The master node receives a Link-Down message on its secondary port DebuggingPage 49 AlliedWare OS How To Note EPSR 4. The master node transmits a Ring-Down-Flush-FDB message5. The master node receives a second Link-Down message DebuggingPage 50 AlliedWare OS How To Note EPSR 6. The master node continues sending Health messages7. The master node receives a Health message Page 51 AlliedWare OS How To Note EPSR 8. The master node returns the ring to a state of Complete9. The master node receives the Ring-Up-Flush-FDB message on port DebuggingDebugging 10. The master node transmits and receives Health messagesPage 52 AlliedWare OS How To Note EPSR 1. The transit node receives Health messages Page 53 AlliedWare OS How To Note EPSRTransit Node Node B Debug Output 2. The link between the two transit nodes goes down3. The transit node receives a Ring-Down-Flush-FDB message 4. The transit node sends a Link-Down messagePage 54 AlliedWare OS How To Note EPSR 7. The transit node receives another Health message 5. The transit node receives Health messages6. The link comes back up Page 55 AlliedWare OS How To Note EPSR8. The transit node receives a Ring-Up-Flush-FDB message 9. The transit node receives Health messages