Allied Telesis X900-48FE-N, AT-9924T/4SP-A-20, AT-8948, AT-9924T-40, AT-9924SP-30 manual Counters

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Master node in

aComplete ring

Counters

Counters

The EPSR counters record the number of EPSR messages that the CPU received and transmitted. To display the counters, use the command:

show epsr=domain1 count

The following diagram shows the counters for a master node in a ring that has never had a link or node fail.

EPSR Counters

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

Name: domain1

 

 

 

Receive:

 

Transmit:

 

Total EPSR Packets

1093

Total EPSR Packets

1093

Health

1092

Health

1092

Ring Up

1

Ring Up

1

Ring Down

0

Ring Down

0

Link Down

0

Link Down

0

Invalid EPSR Packets

0

 

 

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

Transit Node in a ring that had failures

Note that the node has generated 1093 EPSR packets (and sent them out its primary port) and has received the same number of EPSR packets (on its secondary port).

However, it is very common to see a few Link Down, Ring Down, and Ring Up entries in the output of a ring that has never been in a Failed state. These messages are produced when you first enable EPSR, if some ring nodes establish before others.

In contrast, the following diagram shows the counters for a transit node in a ring that has been in a Failed state twice.

EPSR Counters

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

Name: domain1

 

 

 

Receive:

 

Transmit:

 

Total EPSR Packets

1425

Total EPSR Packets

2

Health

1423

Health

0

Ring Up

2

Ring Up

0

Ring Down

0

Ring Down

0

Link Down

0

Link Down

2

Invalid EPSR Packets

0

 

 

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

Here, the transit node has received 1421 Health messages, which it will have forwarded on if its ports were up. These messages do not show in the transmit counters because they are transmitted by the switching hardware, not the CPU.

The node has also generated two Link-Down messages, indicating that on two separate occasions one of its links has gone down.

Page 35 AlliedWare™ OS How To Note: EPSR

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Contents What information will you find in this document? IntroductionWhich products and software versions does it apply to? Epsr Components How Epsr WorksEstablishing a Ring Fault in a link or a transit node Recovering from a FaultFault in the master node Transit Nodes with Both Ports Down Restoring Normal OperationMaster Node Transit Nodes with One Port DownConfiguring Epsr How To Configure EpsrConfigure other ports and protocols as required Iii. Remove the ring ports from the default VlanIv. Configure the Epsr domain Enable EpsrModifying the Control Vlan Example 1 a Basic Ring Configure the Master Node aAdd the data Vlan to the domain Configure the Transit Nodes B and CRemove the ring ports from the default Vlan Create the Epsr domainCreate epsr=test mode=transit controlvlan=vlan1000 Example 2 a Double Ring Configure the master node switch a for domainConfigure Epsr Configure the master node switch C for domainConfigure the data Vlan for domain Example 3 Epsr and Rstp Configure the master node switch a for the Epsr domainRemove the STP VLAN’s ports from the default Vlan Configure switch E for Epsr and Rstp Epsr Domain Example 4 Epsr with Nested VLANsConfigure the Epsr control Vlan Configure client switch H connected to transit node D Configure client switch E connected to the master nodeConfigure client switch F connected to transit node B Configure client switch G connected to transit node CExample 5 Epsr with management stacking Configure stacking on the second transit node host3 Configure stacking on the first transit node host2Configure Epsr on the stacked switches Configure the other VLANs on the stacked switchesExample 6 Epsr with an iMAP Configure the AT-TN7100 iMAP as Master NodeFollowing diagram shows the expected output Checking the Master Node ConfigurationChecking the Transit Node Configuration Configure the AT-TN7100 iMAP as a Transit NodeLINKS-UP Classifiers and Hardware FiltersPorts and Recovery Times Health Message Priority Igmp Snooping and Recovery TimesEpsr State and Settings Epsr Information Name Domain1 Snmp Traps Counters Master node sends Health messages DebuggingLink Down Between Master Node and Transit Node Master Node Node a Debug OutputPrimary port goes down Master node continues sending Health messagesMaster node transmits a Ring-Down-Flush-FDB message Primary port comes back up Hello timer expiresHello timer expires again Master node receives the Ring-Up-Flush-FDB message on port Master node returns the ring to a state of CompleteMaster node transmits and receives Health messages Transit node receives Health messages Transit Node Node B Debug OutputTransit node receives a Ring-Down-Flush-FDB message Port 1 on the transit node goes downTransit node receives a Health message Port 1 comes back upTransit node receives a Ring-Up-Flush-FDB message 252 Link Down Between Two Transit Nodes Link between the two transit nodes goes down Master node receives a second Link-Down message Master node receives a Health message 51 AlliedWare OS How To Note Epsr 375 53 AlliedWare OS How To Note Epsr Transit node sends a Link-Down message Transit node receives another Health message Link comes back upTransit node receives a Ring-Up-Flush-FDB message

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

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