3 Dell Force10 VLT Technical Guide
Document control ............................................................................................................................... 2
Disclaimer ............................................................................................................................................. 2
1. VLT overview ................................................................................................................................ 4
1.1. Definitions ............................................................................................................................. 4
1.2. Topologies ............................................................................................................................ 5
2. VLT deployment ........................................................................................................................... 8
2.1. Procedure ............................................................................................................................. 8
2.2. Hints and tips ...................................................................................................................... 10
3. Verification and troubleshooting ............................................................................................ 11
3.1. Overview ............................................................................................................................. 11
3.2. Statistics ............................................................................................................................... 11
3.3. Backup link .......................................................................................................................... 11
3.4. VLANs ................................................................................................................................... 12
4. Failover Testing .......................................................................................................................... 13
4.1. Overview ............................................................................................................................. 13
4.2. Generic equipment list for tests...................................................................................... 13
4.3. Test 1 – No VLT, “ultra-“RSTP, L2 only, Unit failure ................................................. 16
4.4. Test 2 – No VLT, RSTP, L2 only, Device failure ............................................................ 18
4.5. Test 3 – VLT, L2 only, Dampening, Device failure ..................................................... 20
4.6. Test 4 – VLT, L2 only, Dampening, Link failure .......................................................... 22
4.7. Test 5 – VLT, L3 (inter-VLAN), Dampening, Unit failure ............................................ 24
4.8. Test 6 – VLT, L3 (inter-VLAN), Dampening, Link failure ............................................ 26
5. Annexes ...................................................................................................................................... 28
5.1. Configurations................................................................................................................... 28
5.1.1. S4810-1 .......................................................................................................................... 28
5.1.2. S4810-2 .......................................................................................................................... 35
5.1.3. S60-1 ............................................................................................................................... 42
5.1.4. S50-2 .............................................................................................................................. 48
