7
3.1.4.2. Configuring the VLANs and Ports on Switch 2 .............................................................................................. 64
3.2. Switchport Modes .................................................................................................................. 64
3.3. Port-channels – Operation and Configuration ...................................................................... 66
3.3.1. Static and Dynamic Port-channel ..................................................................................................................... 66
3.3.2. Port-channel Hashing ....................................................................................................................................... 66
3.3.2.1. Resilient Hasing ............................................................................................................................................ 67
3.3.2.2. Hash Prediction with ECMP and Port-channel .............................................................................................. 67
3.3.3. Port-channel Interface Overview ...................................................................................................................... 68
3.3.4. Port-channel Interaction with Other Features .................................................................................................. 68
3.3.4.1. VLAN ............................................................................................................................................................. 68
3.3.4.2. STP ................................................................................................................................................................ 69
3.3.4.3. Statistics ....................................................................................................................................................... 69
3.3.5. Port-channel Configuration Guidelines ............................................................................................................. 69
3.3.5.1. Port-channel Configuration Examples .......................................................................................................... 69
3.3.5.2. Configuration Dynamic Port-channels .......................................................................................................... 70
3.3.5.3. Configuration Static Port-channels ............................................................................................................... 71
3.4. LACP Fallback Configuration .................................................................................................. 72
3.4.1. Configuring Dynamic Port-channels ................................................................................................................. 72
3.4.2. Configuring Static Port-channels ...................................................................................................................... 73
3.5. MLAG – Operation and Configuration ................................................................................... 74
3.5.1. Overview ........................................................................................................................................................... 75
3.5.2. Deployment Scenarios ...................................................................................................................................... 75
3.5.2.1. Definitions..................................................................................................................................................... 76
3.5.2.2. Configuration Consistency ............................................................................................................................ 77
3.5.3. MLAG Fast Failover ........................................................................................................................................... 79
3.5.4. MLAG Configuration ......................................................................................................................................... 79
3.6. Unidirectional Link Detection (UDLD) .................................................................................... 82
3.6.1. UDLD Modes ..................................................................................................................................................... 82
3.6.2. UDLD and Port-channel Interfaces ................................................................................................................... 82
3.6.3. Configuring UDLD ............................................................................................................................................. 82
3.7. Port Mirroring ........................................................................................................................ 84
3.7.1. Configuring Port Mirroring ............................................................................................................................... 84
3.7.2. Configuring RSPAN ........................................................................................................................................... 85
3.7.2.1. Configuration on the Source Switch (SW1) ................................................................................................... 85
3.7.2.2. Configuration on the Intermediate Switch (SW2) ......................................................................................... 86
3.7.2.3. Configuration on the Destination Switch (SW3) ........................................................................................... 87