Link Aggregation And Spanning Tree Example - Alcatel OmniSwitch 6800 Series Network Configuration Manual

Application Examples

Link Aggregation and Spanning Tree Example

As shown in the figure on
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:
Note. Only the steps to configure the local (i.e., Switch A) are provided here since the steps to configure
the remote (i.e., Switch B) would not be significantly different.
1 Configure dynamic aggregate group 5 by entering:
-> lacp linkagg 5 size 2
2 Configure ports 5/5 and 5/6 with same actor administrative key (5) by entering:
-> lacp agg 3/9 actor admin key 5
-> lacp agg 3/10 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
Note. Optional. Use the
to display other STP parameters. For example:
-> show spantree 10 ports
Spanning Tree Port Summary for Vlan 10
Adm Oper Man. Path
Port Pri St
-----+---+---+----+----+-----+-----+----+---+-----+---+---+---------------------
3/13 7 ENA FORW No
2/10 7 ENA FORW No
5/2 7 ENA DIS No
0/5 7 ENA FORW No
In the example above the link aggregation group is indicated by the "0" for the slot number.
5 Configure VLAN 10 (which uses dynamic aggregate group 5) to the highest (15) priority possible by
entering:
-> bridge 10 5 mode priority 15
6
Repeat steps 1 through 5 on Switch B. All the commands would be the same except you would substi-
tute the appropriate port numbers.
page 11-30
page 11-29, VLAN 10, which uses the Spanning Tree Protocol (STP) with a
show spantree ports
Desig
St mode Cost Cost Role Tx Port Cnx Cnx Desig Bridge ID
100 0
19 0
0 0
4 0
OmniSwitch 6800 Series Network Configuration Guide
Configuring Dynamic Link Aggregation
command to determine if the STP is enabled or disabled and
Fw Prim. Adm Op
DESG 1 3/13 EDG NPT 000A-00:d0:95:6b:0a:c0
DESG 1 2/10 PTP PTP 000A-00:d0:95:6b:0a:c0
DIS 0 5/2 EDG NPT 0000-00:00:00:00:00:00
DESG 1 0/10 PTP PTP 000A-00:d0:95:6b:0a:c0
November 2004