iv
Configuring the interval for sending Syslog or trap messages········································································· 27
Configuring the MAC Information queue length································································································ 27
MAC Information configuration example ···················································································································· 28
Ethernet link aggregation configuration ······················································································································ 29
Overview········································································································································································· 29
Basic concepts ······················································································································································· 29
Aggregating links in static mode ························································································································· 32
Aggregating links in dynamic mode ··················································································································· 34
Load-sharing criteria for link aggregation groups ····························································································· 36
Ethernet link aggregation configuration task list ········································································································· 36
Configuring an aggregation group ····························································································································· 36
Configuration guidelines ······································································································································ 36
Configuring a static aggregation group ············································································································· 37
Configuring a dynamic aggregation group ······································································································· 37
Configuring an aggregate interface ···························································································································· 38
Configuring the description of an aggregate interface····················································································· 39
Enabling link state traps for an aggregate interface ························································································· 39
Shutting down an aggregate interface ··············································································································· 39
Configuring load sharing for link aggregation groups ······························································································ 40
Configuring load-sharing criteria for link aggregation groups ········································································ 40
Enabling local-first load sharing for link aggregation ······················································································· 41
Enabling link-aggregation traffic redirection··············································································································· 42
Displaying and maintaining Ethernet link aggregation ····························································································· 43
Ethernet link aggregation configuration examples ····································································································· 43
Layer 2 static aggregation configuration example ···························································································· 44
Layer 2 dynamic aggregation configuration example ······················································································ 46
Layer 2 aggregation load sharing configuration example ··············································································· 48
Port isolation configuration ··········································································································································· 51
Introduction to port isolation ········································································································································· 51
Configuring the isolation group ··································································································································· 51
Displaying and maintaining isolation groups ············································································································· 52
Port isolation configuration example ··························································································································· 52
MSTP configuration ······················································································································································· 54
Introduction to STP ························································································································································· 54
Why STP ································································································································································· 54
Protocol packets of STP ········································································································································· 54
Basic concepts in STP ··········································································································································· 55
How STP works ······················································································································································ 56
Introduction to RSTP ······················································································································································· 62
Introduction to MSTP ······················································································································································ 62
Why MSTP ····························································································································································· 62
Basic concepts in MSTP ········································································································································ 63
How MSTP works ·················································································································································· 66
Implementation of MSTP on devices···················································································································· 67
Protocols and standards ······································································································································· 67
MSTP configuration task list ·········································································································································· 67
Configuring MSTP ·························································································································································· 69
Configuring an MST region ································································································································· 69
Configuring the root bridge or a secondary root bridge ·················································································· 69
Configuring the work mode of an MSTP device ································································································ 70
Configuring the priority of a device ···················································································································· 71
Configuring the maximum hops of an MST region ··························································································· 71
Configuring the network diameter of a switched network ················································································ 72
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