ii
Configuring the MAC learning limit on ports ···································································································· 23
Enabling MAC address migration log notifying ································································································ 23
Displaying and maintaining MAC address tables ····························································································· 24
MAC address table configuration example ······································································································ 24
Network requirements ······························································································································ 24
Configuration procedure ··························································································································· 25
Configuring MAC Information ········································································ 26
Overview ·························································································································································· 26
Introduction to MAC Information ·············································································································· 26
How MAC Information works ···················································································································· 26
Enabling MAC Information globally ·················································································································· 26
Enabling MAC Information on an interface ······································································································ 26
Configuring MAC Information mode ················································································································· 27
Configuring the interval for sending Syslog or trap messages ········································································· 27
Configuring the MAC Information queue length ······························································································· 27
MAC Information configuration example ·········································································································· 28
Network requirements ······························································································································ 28
Configuration procedure ··························································································································· 28
Configuring Ethernet link aggregation ··························································· 29
Overview ·························································································································································· 29
Basic concepts ········································································································································· 29
Aggregating links in static mode ·············································································································· 32
Aggregating links in dynamic mode ········································································································· 33
Load-sharing criteria for link aggregation groups ····················································································· 34
Configuration restrictions and guidelines ········································································································· 35
Ethernet link aggregation configuration task list ······························································································ 35
Configuring an aggregation group ··················································································································· 35
Configuration guidelines ··························································································································· 35
Configuring a static aggregation group ···································································································· 36
Configuring a dynamic aggregation group ······························································································· 37
Configuring an aggregate interface ·················································································································· 38
Configuring the description of an aggregate interface ············································································· 38
Enabling link state traps for an aggregate interface ················································································· 38
Limiting the number of Selected ports for an aggregation group ····························································· 38
Shutting down an aggregate interface ····································································································· 39
Restoring the default settings for an aggregate interface ········································································ 39
Configuring load sharing for link aggregation groups ······················································································ 40
Configuring load-sharing criteria for link aggregation groups ··································································· 40
Displaying and maintaining Ethernet link aggregation ····················································································· 40
Ethernet link aggregation configuration examples ··························································································· 41
Layer 2 static aggregation configuration example ···················································································· 41
Layer 2 dynamic aggregation configuration example ··············································································· 43
Configuring port isolation ·············································································· 46
Assigning a port to the isolation group ············································································································· 46
Displaying and maintaining the isolation group ································································································ 46
Port isolation configuration example ················································································································ 46
Configuring spanning tree protocols ····························································· 48
STP ·································································································································································· 48
STP protocol packets ······························································································································· 48
Basic concepts in STP ····························································································································· 49
Calculation process of the STP algorithm ································································································ 50
RSTP ······························································································································································· 55
PVST ································································································································································ 55
MSTP ······························································································································································· 55
STP, RSTP, and PVST limitations ··········································································································· 55
MSTP features ········································································································································· 55
MSTP basic concepts ······························································································································ 56
How MSTP works ····································································································································· 60
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