Configuring Dynamic Link Aggregation Application Examples
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 9-26
Link Aggregation and Spanning Tree Example
As shown in the figure on page 9-25, VLAN 10, which uses the Spanning Tree Protocol (STP) with a
priority of 15, has been configured to use dynamic aggregate group 7. The actual physical links connect
ports 3/9 and 3/10 on Switch A to ports 1/1 and 1/2 on Switch B. Follow the steps below to configure this
network:
1 Configure dynamic aggregate group 5 by entering:
-> linkagg lacp agg 5 size 2
2 Configure ports 5/5 and 5/6 with the same actor administrative key (5) by entering:
-> linkagg lacp port 5/5-6 actor admin-key 5
3 Create VLAN 10 by entering:
-> vlan 10
4 If the Spanning Tree Protocol (STP) has been disabled on this VLAN (STP is enabled by default),
enable it on VLAN 10 by entering:
-> vlan 10 stp enable
5 Configure VLAN 10 (which uses dynamic aggregate group 5) to the highest (15) priority possible by
entering:
-> spantree vlan 10 linkagg 5 priority 15
6 Repeat steps 1 through 5 on Switch B. Substitute the port numbers of the commands with the
appropriate port numbers of Switch B.
Note. Only the steps to configure the local (Switch A) are provided here since the steps to configure the
remote (Switch B) are similar.
Note. Optional. Use the show spantree ports command to determine if the STP is enabled or disabled and
to display other STP parameters. For example:
-> show spantree vlan 10 ports
Spanning Tree Port Summary for Vlan 10 AdmOper Man. Path Desig FwPrim.AdmOp
Port Pri St St mode Cost Cost Role Tx Port Cnx Cnx Desig Bridge ID
-----+---+---+----+----+-----+-----+----+---+-----+---+---+---------------------
3/13 7 ENA FORW No 100 0 DESG 1 3/13EDG NPT 000A-00:d0:95:6b:0a:c0
2/10 7 ENA FORW No 19 0 DESG 1 2/10PTP PTP 000A-00:d0:95:6b:0a:c0
5/2 7 ENA DIS No 0 0 DIS 0 5/2 EDG NPT 0000-00:00:00:00:00:00
0/5 7 ENA FORW No 4 0 DESG 1 0/10PTP PTP 000A-00:d0:95:6b:0a:c0
In the example above the link aggregation group is indicated by the “0” for the slot number.
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