MAC Information configuration ································································································································ 28

Overview ········································································································································································· 28

Introduction to MAC Information ························································································································· 28

How MAC Information works ······························································································································ 28

Configuring MAC Information ······································································································································ 28

Enabling MAC Information globally ··················································································································· 28

Enabling MAC Information on an interface ······································································································· 28

Configuring MAC Information mode ·················································································································· 29

Configuring the interval for sending Syslog or trap messages ········································································· 29

Configuring the MAC Information queue length ································································································ 29

MAC Information configuration example ···················································································································· 30

Ethernet link aggregation configuration ··················································································································· 31

Basic concepts ······················································································································································· 31

Aggregating links in static mode ························································································································· 34

Aggregating links in dynamic mode ··················································································································· 35

Load-sharing criteria for link aggregation groups ····························································································· 37

Ethernet link aggregation configuration task list ········································································································· 37

Configuring an aggregation group ····························································································································· 38

Configuration guidelines ······································································································································ 38

Configuring a static aggregation group ············································································································· 39

Configuring a dynamic aggregation group ······································································································· 40

Configuring an aggregate interface ···························································································································· 42

Configuring the description of an aggregate interface ····················································································· 42

Configuring the MTU of a Layer 3 aggregate interface ··················································································· 42

Enabling link state traps for an aggregate interface ························································································· 43

Setting the minimum number of Selected ports for an aggregation group ····················································· 43

Shutting down an aggregate interface ··············································································································· 44

Restoring the default settings for an aggregate interface ················································································· 44

Configuring load sharing for link aggregation groups ······························································································ 45

Configuring load-sharing criteria for link aggregation groups ········································································ 45

Enabling local-first load sharing for link aggregation ······················································································· 46

Enabling link-aggregation traffic redirection ··············································································································· 47

Displaying and maintaining Ethernet link aggregation ····························································································· 47

Ethernet link aggregation configuration examples ····································································································· 48

Layer 2 static aggregation configuration example ···························································································· 48

Layer 2 dynamic aggregation configuration example ······················································································ 50

Layer 3 static aggregation configuration example ···························································································· 52

Layer 3 dynamic aggregation configuration example ······················································································ 54

Port isolation configuration ········································································································································ 56

Introduction to port isolation ········································································································································· 56

Assigning a port to the isolation group ······················································································································· 56

Displaying and maintaining isolation groups ············································································································· 56

Port isolation configuration example ···························································································································· 57

Spanning tree configuration ······································································································································ 58

STP ··················································································································································································· 58

STP protocol packets ············································································································································· 58

Basic concepts in STP ············································································································································ 59

Calculation process of the STP algorithm ··········································································································· 60

RSTP ················································································································································································· 65

PVST ················································································································································································· 66

MSTP ················································································································································································ 66

STP, RSTP, and PVST limitations ·························································································································· 66