Allied Telesis AT-9924T/4SP-A-20 manual Debugging, Link Down Between Master Node and Transit Node

Page 36

Debugging

Debugging

This section walks you through the EPSR debugging output as links go down and come back up again. The debugging output comes from the ring in "Example 1: A Basic Ring" on page 11. The output shows what happened when we took down two separate links in turn:

first, the link between the master node’s primary port and transit node B

second, the link between the two transit nodes B and C

To enable debugging on the domain called “test”, use the command:

enable epsr=test debug=all

Note that the master node transmits Health messages every second by default. The debugging displays every message, including all Health messages. Therefore, we recommend that you capture the debugging output for separate analysis, to make analysis simpler.

Link Down Between Master Node and Transit Node

This section shows the debugging output when the link between the master node’s primary port and transit node B goes down and comes back up again. It shows the debugging output for the complete failure and recovery cycle:

first on the master node

then on transit node B.

Master Node (Node A) Debug Output

The following debugging output starts with the ring established and in a state of Complete.

1.The master node sends Health messages

Each time the Hello timer expires, the master node sends a Health message out its primary port (port 1). As long as the ring is in a state of Complete, it receives each Health message again on its secondary port (port 2). Note that in the System field, this output shows the MAC address of the source of the message—the master node in this case.

Manager x900-48-A>

epsrHelloTimeout: EPSR test Hello Timer expired

EPSR Port1 Tx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b 00bb0100 00541f2a 00000000 0000cd28 0619990b 00400105 03e80000 00000000 cd280619 00010002 010000be

EPSR Port1 Tx:

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

TYPE

= HEALTH

STATE

= COMPLETE

CTRL VLAN

= 1000

SYSTEM

=

00-00-cd-28-06-19

HELLO TIME

=

1

FAIL TIME

=

2

HELLO SEQ

=

190

 

 

 

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

EPSR Port2 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b

00bb0100 00541f2a

00000000

0000cd28

0619990b

00400105

03e80000

00000000 cd280619

00010002

010000be

 

 

 

EPSR Port2 Rx:

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

TYPE

= HEALTH

STATE

= COMPLETE

CTRL VLAN

= 1000

SYSTEM

=

00-00-cd-28-06-19

HELLO TIME

=

1

FAIL TIME

=

2

HELLO SEQ

=

190

 

 

 

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

Page 36 AlliedWare™ OS How To Note: EPSR

Image 36
Contents Introduction What information will you find in this document?Which products and software versions does it apply to? How Epsr Works Epsr ComponentsEstablishing a Ring Recovering from a Fault Fault in a link or a transit nodeFault in the master node Restoring Normal Operation Master NodeTransit Nodes with One Port Down Transit Nodes with Both Ports DownHow To Configure Epsr Configuring EpsrIii. Remove the ring ports from the default Vlan Iv. Configure the Epsr domainEnable Epsr Configure other ports and protocols as requiredModifying the Control Vlan Configure the Master Node a Example 1 a Basic RingConfigure the Transit Nodes B and C Remove the ring ports from the default VlanCreate the Epsr domain Add the data Vlan to the domainCreate epsr=test mode=transit controlvlan=vlan1000 Configure the master node switch a for domain Example 2 a Double RingConfigure the master node switch C for domain Configure EpsrConfigure the data Vlan for domain Configure the master node switch a for the Epsr domain Example 3 Epsr and RstpRemove the STP VLAN’s ports from the default Vlan Configure switch E for Epsr and Rstp Example 4 Epsr with Nested VLANs Epsr DomainConfigure the Epsr control Vlan Configure client switch E connected to the master node Configure client switch F connected to transit node BConfigure client switch G connected to transit node C Configure client switch H connected to transit node DExample 5 Epsr with management stacking Configure stacking on the first transit node host2 Configure stacking on the second transit node host3Configure the other VLANs on the stacked switches Configure Epsr on the stacked switchesConfigure the AT-TN7100 iMAP as Master Node Example 6 Epsr with an iMAPChecking the Master Node Configuration Following diagram shows the expected outputConfigure the AT-TN7100 iMAP as a Transit Node Checking the Transit Node ConfigurationClassifiers and Hardware Filters LINKS-UPPorts and Recovery Times Igmp Snooping and Recovery Times Health Message PriorityEpsr State and Settings Epsr Information Name Domain1 Snmp Traps Counters Debugging Link Down Between Master Node and Transit NodeMaster Node Node a Debug Output Master node sends Health messagesMaster node continues sending Health messages Primary port goes downMaster node transmits a Ring-Down-Flush-FDB message Hello timer expires Hello timer expires againPrimary port comes back up Master node returns the ring to a state of Complete Master node receives the Ring-Up-Flush-FDB message on portMaster node transmits and receives Health messages Transit Node Node B Debug Output Transit node receives Health messagesPort 1 on the transit node goes down Transit node receives a Ring-Down-Flush-FDB messagePort 1 comes back up Transit node receives a Health messageTransit 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 Link comes back up Transit node receives another Health messageTransit node receives a Ring-Up-Flush-FDB message

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