Allied Telesis AT-9924T-40, X900-48FE-N, AT-9924T/4SP-A-20 Port 1 on the transit node goes down

Page 43

Debugging

2.Port 1 on the transit node goes down

The transit node detects that port 1 (between the transit node and the master node) has gone down. The transit node flushes its forwarding database, blocks port 1 for the data VLAN (to prevent a loop from forming when the master node comes back up), sends a Link- Down message towards the master node, sends a trap, and changes the EPSR state to Link- Down.

This is the packet shown in step 4 on page 38 of the master node debug output.

EPSR test, Port 1 port down Flush FDB EPSR: test vid: 2 Block EPSR:test port:1 VLAN:2

EPSR Port2 Tx: 00e02b00 00040000 cd24024f 8100e3e8 005caaaa 0300e02b 00bb0100 00542484 00000000 0000cd24 024f990b 00400108 03e80000 00000000 cd24024f 00000000 04000000

EPSR Port2 Tx:

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

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

 

 

 

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

EPSR INFO: Send trap EPSR:test oldState:LINK-UP newState:LINK-DOWN nodeType:TRANSIT

EPSR test oldState:LINK-UP newState:LINK-DOWN

3.The transit node receives a Ring-Down-Flush-FDB message.

In response to the Link-Down message, the master node sends a Ring-Down-Flush-FDB message. However, this transit node does not need to flush its database—it already did.

This is the packet shown in step 5 on page 38 of the master node debug output.

EPSR Port2 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b 00bb0100 00541ee9 00000000 0000cd28 0619990b 00400107 03e80000 00000000 cd280619 00000000 02000000

EPSR Port2 Rx:

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

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

 

 

 

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

Page 43 AlliedWare™ OS How To Note: EPSR

Image 43
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 Hello timer expires again Hello timer expiresPrimary port comes back up 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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