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

Contents

Main AlliedWareTM OS How To | Introduction What information will you find in this document? Configure EPSR (Ethernet Protection Switching Ring) to Protect a Ring from Loops Which products and software versions does it apply to? How EPSR Works EPSR Components Establishing a Ring Detecting a Fault Recovering from a Fault Fault in a link or a transit node Fault in the master node Restoring Normal Operation Master Node Transit Nodes with One Port Down Transit Nodes with Both Ports Down How To Configure EPSR Configuring EPSR ii. Configure the data VLAN 1. Connect your switches into a ring 2. On each switch, configure EPSR i. Configure the control VLAN Modifying the Control VLAN Example 1 : A Basic Ring 000 and data packets on vlan2. Configure the Master Node (A) Configure the Transit Nodes (B and C) Page Example 2: A Double Ring This example adds to the previous ring by making two domains, as shown in the following diagram. 1. Configure the master node (switch A) for domain The master node for domain is the same as in the previous example (except that the domain has been renamed). 2. Configure the transit node (switch B) that belongs just to domain 3. Configure the master node (switch C) for domain 2 4. Configure the transit node (switch D) that belongs just to domain 2 5. Configure the transit node (switch E) that belongs to both domains Example 3: EPSR and RSTP This example uses EPSR to protect one ring and RSTP to protect another overlapping ring. The master node is the same as in the previous example. 1. Configure the master node (switch A) for the EPSR domain Domain 1 2. Configure the transit node (switch B) that belongs just to the EPSR domain 3. Configure the switches that belong to the RSTP instance (switches C and D) 4. Configure switch E for EPSR and RSTP Example 4: EPSR with Nested VLANs In this example: 00 is the control VLAN for the EPSR domain EPSR Domain 1. Configure the master node (switch A) for the EPSR domain 2. Configure the transit nodes (switches B, C and D) for the EPSR domain 3. Configure client switch E (connected to the master node) 4. Configure client switch F (connected to transit node B) 6. Configure client switch H (connected to transit node D) 5. Configure client switch G (connected to transit node C) Example 5: EPSR with management stacking 1. Configure stacking on the master node for the EPSR domain (host ) 3. Configure stacking on the second transit node (host3) 2. Configure stacking on the first transit node (host2) 4. Configure the other VLANs on the stacked switches 5. Configure EPSR on the stacked switches Example 6: EPSR with an iMAP 1 Configure the AT-TN7 00 iMAP as Master Node Checking the Master Node Configuration To see a summary, use the command: show epsr To see details, use the command: show epsr=test Configure the AT-TN7 1 00 iMAP as a Transit Node Checking the Transit Node Configuration To see a summary, use the command: Classifiers and Hardware Filters Ports and Recovery Times IGMP Snooping and Recovery Times Health Message Priority EPSR State and Settings Master Node in a Failed Ring SNMP Traps Counters Debugging Link Down Between Master Node and Transit Node Master Node (Node A) Debug Output 2. The master node continues sending Health messages 3. The primary port goes down 4. The master node receives a Link-Down message on its secondary port 5. The master node transmits a Ring-Down-Flush-FDB message 6. The Hello timer expires 7. The primary port comes back up 8. The Hello timer expires again 9. The master node receives the Health message on its secondary port 10. The master node returns the ring to a state of Complete 11. The master node receives the Ring-Up-Flush-FDB message on port 2 12. The master node transmits and receives Health messages . . . Transit Node (Node B) Debug Output 1. The transit node receives Health messages 2. Port on the transit node goes down 3. The transit node receives a Ring-Down-Flush-FDB message. 4. Port 1 comes back up 5. Transit node receives a Health message 6. Transit node receives a Ring-Up-Flush-FDB message. 7. The transit node receives Health messages Link Down Between Two Transit Nodes Master Node (Node A) Debug Output 1. The master node sends Health messages 2. The link between the two transit nodes goes down 3. The master node receives a Link-Down message on its secondary port 4. The master node transmits a Ring-Down-Flush-FDB message 5. The master node receives a second Link-Down message 6. The master node continues sending Health messages . . . 7. The master node receives a Health message 8. The master node returns the ring to a state of Complete 9. The master node receives the Ring-Up-Flush-FDB message on port 2 10. The master node transmits and receives Health messages . . . Transit Node (Node B) Debug Output 1. The transit node receives Health messages 2. The link between the two transit nodes goes down 3. The transit node receives a Ring-Down-Flush-FDB message 4. The transit node sends a Link-Down message 5. The transit node receives Health messages 6. The link comes back up 7. The transit node receives another Health message 8. The transit node receives a Ring-Up-Flush-FDB message 9. The transit node receives Health messages

Allied Telesis manual

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