Alcatel-Lucent OmniSwitch 6250, Cli Reference Manual, Page: 519 / 2018

Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-79
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Is a 16-bit path cost value is in use and the path_cost is set to zero, the following IEEE 802.1D recom-
mended default path cost values based on link speed are used:
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If a 32-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:
Link Speed
IEEE 802.1D
Recommended Value
10 MB 2,000,000
100 MB 200,000
1 GB 20,000
10 Gbps 2,000
Link Speed
IEEE 802.1D
Recommended Value
4 Mbps 250
10 Mbps 100
16 Mbps 62
100 Mbps 19
1 Gbps 4
10 Gbps 2
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
4 80,000
8 60,000
1 GB 2 12,000
4 8,000
8 6,000
10 GB 2 1,200
4 800
8 600