Alcatel-Lucent OmniSwitch 6800 Series Network Configuration Manual page 184

Configuring STP Port Parameters
Aggregate Size
Link Speed
(number of links)
1 GB
10 GB
If a 16-bit path cost value is in use and the path_cost for a link aggregate is set to zero, the following
default values based on link speed and link aggregate size are used. Note that for Gigabit ports the aggre-
gate size is not applicable in this case:
Aggregate Size
Link Speed
(number of links)
10 Mbps
100 Mbps
1 Gbps
10 Gbps
To change the path cost value for a link aggregate, use the bridge slot/port path cost commands
described above, but specify a link aggregate control number instead of a slot and port. For example, the
following command sets the path cost for link aggregate 10 associated with VLAN 755 to 19:
-> bridge 755 10 path cost 19
For more information about configuring an aggregate of ports, see
Aggregation," and Chapter 17, "Configuring Dynamic Link Aggregation."
page 7-34
Default Path
Cost Value
4 80,000
8 60,000
2 12,000
4 8,000
8 6,000
2 1,200
4 800
8 600
Default Path
Cost Value
2 60
4 40
8 30
2 12
4 9
8 7
N/A 3
N/A 1
OmniSwitch 6800/6850/9000 Network Configuration Guide
Configuring Spanning Tree Parameters
Chapter 16, "Configuring Static Link
March 2008