Restrictionsfor VLAN Trunks 62
InformationAbout VLAN Trunks 62
TrunkingOverview 62
TrunkingModes 62
Layer2 InterfaceModes 63
AllowedVLANs on aTrunk 64
LoadSharing on TrunkPorts 64
NetworkLoad Sharing Using STP Priorities 64
NetworkLoad Sharing Using STP PathCost 65
FeatureInteractions 66
DefaultLayer 2 EthernetInterface VLAN Configuration 66
Howto ConfigureVLAN Trunks 67
Configuringan Ethernet Interface as a Trunk Port 67
Configuringa Trunk Port 67
Definingthe Allowed VLANs on a Trunk 69
Changingthe Pruning-EligibleList 71
Configuringthe Native VLAN forUntagged Traffic 72
ConfiguringTrunk Ports for Load Sharing 73
ConfiguringLoad Sharing Using STPPort Priorities 73
ConfiguringLoad Sharing Using STPPath Cost 77
ConfigurationExamples for VLAN Trunking 80
Example:Configuring an IEEE802.1Q Trunk 80
Example:Removing a VLAN 81
Whereto Go Next 81
AdditionalReferences 81
FeatureHistory and Informationfor VLAN Trunks 82
CHAPTER 5
ConfiguringPrivate VLANs 83
FindingFeature Information 83
Prerequisitesfor Private VLANs 83
Secondaryand Primary VLAN Configuration 84
PrivateVLAN Port Configuration 85
Restrictionsfor Private VLANs 86
Limitationswith Other Features 86
InformationAbout Private VLANs 87
Catalyst 2960-XR Switch VLAN Configuration Guide, Cisco IOS Release 15.0(2)EX1
vi OL-29440-01
Contents