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How To Configure LACP with SMLT

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TitleHow To Configure LACP with SMLT
How To Configure LACP with SMLT
Running all supported software

Note: a vIST/IST will need to be configured before SMLT can operate. See the below article on how to configure a vIST/IST if needed:

Step 1: Tag ports for VLANs, create VLANs, remove and add VLANs, configure i-sid if needed
1. Type vlan ports <ports> tag tagall
2. Type vlan create <vlan-id> type port-mstprstp 0
3. Type vlan members add <vlan> <ports>
4. Type vlan members remove 1 <ports>
5. Type vlan i-sid <vlan> <i-sid> 

Step 2: Create MLT, enter MLT interface to add and enable LACP
1. Type mlt <mlt-id>
2. Type interface mlt <mlt-id>
3. Type lacp key <key>
4. Type lacp enable
5. Type smlt
6. Type exit
7. Type lacp enable

Step 3: Configure and enable LACP key on port
1. Type interface gigabitethernet <ports>
2. Type lacp key <key>
3. Type lacp aggregation enable
4. Type lacp timeout-time short [optional]
5. Type lacp enable
6. Type exit
7. Type lacp smlt-sys-id [base mac of one of the vIST switches. Needs to match on both switches]

Verify System-id, smlt-system-id, and that LACP is enabled
1. Type show lacp

Lacp Global Information
               SystemId: 84:83:71:f6:14:00
           SmltSystemId: 00:00:00:00:00:00
                   Lacp: enable
        system-priority: 32768
                timeout-admin: 3
     fast-periodic-time-admin: 1000
     slow-periodic-time-admin: 30000
         aggr-wait-time-admin: 2000
                timeout-oper: 3
     fast-periodic-time-oper: 1000
     slow-periodic-time-oper: 30000
         aggr-wait-time-oper: 2000
Additional notes
For additional configuration help, see below PDF:

- If non Avaya devices are connected, configure the static bundling on the ports where SMLT links are connected.
- If server is connected, make sure that both the ports of the server are configured as active - active.
- If system priority and port priority values are configured then make sure these are same on both the Cores.

LACP PDU uses these port priority to form the system ID [switch MAC(6 bytes)+ system priority(2 bytes)] value while sending LACP control messages to the partner, when different system and port priority values are configured on VSP-8ks the sys-id value changes when LACP PDU is sent which causes issues with link aggregation



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