Minlink Operations; Minlink Considerations; Link Aggregation Configuration Considerations; Navigation - Avaya 8600 Configuration Manual

MinLink operations

If the number of active links in the LAG becomes less than the MinLink setting, the Ethernet
Routing Switch 8800/8600 marks the LAG as down, and informs the remote end of the LAG
state by using a Link Aggregation Control Protocol Data Unit (LACPDU). The switch continues
to send LACPDUs to neighbors on each available link based on the configured timers. When
the number of active links in the LAG is greater than or equal to the MinLink parameter, LACP
informs the remote end, and the LAG transitions to the forwarding (up) state.
The maximum number of active links in a LAG is 8; however, it is possible to configure up to
16 links in a LAG. The eight inactive links are in Standby mode. If a link goes down, Standby
links take precedence over MinLink. When an active link is disabled, the standby link with the
lowest port number immediately becomes active. MinLink operates after the Standby
processes finish.
Layer 3 protocols react to LAG state changes. When a LAG changes its state (goes up or
down), the Ethernet Routing Switch 8800/8600 traps and logs an event. A Simple Network
Management Protocol (SNMP) trap identifies that the LAG is down due to local action (local
down), that the LAG is down due to remote end notification (remote down), or that the LAG is
up (up).

MinLink considerations

On standard MLT links, you must enable LACP to enable MinLink.
You cannot enable MinLink on Split MultiLink Trunking (SMLT) links because the minimum
number of links with SMLT can only be set to 1.

Link aggregation configuration considerations

Use the information in this section to understand the considerations and guidelines when
configuring link aggregation into your network.

Navigation

• MLT with LACP configuration considerations
• MLT with LACP and SMLT configuration considerations
• MLT with LACP and Spanning Tree configuration considerations
Configuration — Link Aggregation, MLT, and SMLT
Link aggregation configuration considerations
on page 50
on page 51
on page 53
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