Configuring Spanning Tree Parameters Configuring STP Port Parameters
OmniSwitch AOS Release 6 Network Configuration Guide September 2009 page 13-33
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:
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 Chapter 22, “Configuring Static Link
Aggregation,” and Chapter 23, “Configuring Dynamic Link Aggregation.”
Link Speed
Aggregate Size
(number of links)
Default Path
Cost Value
10 MB 2 1,200,000
4 800,000
8 600,000
100 MB 2 120,000
480,000
860,000
1 GB 2 12,000
48,000
86,000
10 GB 2 1,200
4800
8600
Link Speed
Aggregate Size
(number of links)
Default Path
Cost Value
10 Mbps 2 60
440
830
100 Mbps 2 12
49
87
1 Gbps N/A 3
10 Gbps N/A 1
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