Concept Guide

Table Of Contents
0 90:b1:1c:f4:2c:bd LOCAL_DA 00001
0 90:b1:1c:f4:29:f3 LOCAL_DA 00001A
The above output shows that the 90:b1:1c:f4:2c:bd MAC address belongs to Dell-1. The 90:b1:1c:f4:29:f3 MAC address belongs
to Dell-2. Also note that these MAC addresses are marked with LOCAL_DA. This means, these are the local destination MAC
addresses used by hosts when routing is required. Packets sent to this MAC address are directly forwarded to their destinations
without being sent to the peer switch.
Dell-2 Switch Configuration
In the following output, RSTP is enabled with a bridge priority of 32768, which is the second lowest in this topology. This
ensures that Dell-2 becomes the root bridge if Dell-1 fails.
DellEMC#2#sh run | find protocol
protocol spanning-tree pvst
no disable
vlan 1,20,800,900 bridge-priority 32768
The following output shows the existing VLANs.
DellEMC#1#show vlan | find NUM
NUM Status Description Q Ports
* 1 Active U Po10 (Te 0/0-1)
20 Active OSPF PEERING VLAN U Po1 (Te 0/6)
V Po10 (Te 0/0-1)
800 Active Client-VLAN V Po10 (Te 0/0-1)
U Te 0/4
900 Active Client-VLAN-2 V Po10 (Te 0/0-1)
Configuration on Interfaces
DellEMC#2#sh run int ma0/0
interface ManagementEthernet 0/0
description Used_for_VLT_Keepalive
ip address 10.10.10.2/24
no shutdown
In Dell-2, te 0/0 and te 0/1 are used for VLTi.
In Dell-2, tw 1/1 and tw 1/2 are used for VLTi.
DellEMC#2#sh run int te0/0
interface TenGigabitEthernet 0/0
description VLTi LINK
no ip address
no shutdown
!
DellEMC#1#sh run int te0/1
interface TenGigabitEthernet 0/1
description VLTi LINK
no ip address
no shutdown
The following example shows that te 0/0 and te 0/1 are included in port channel 10. Also note that configuration on the VLTi
links does not contain the switchport command.
Dell-2#sh run int po10
interface Port-channel 10
description VLTi Port-Channel
no ip address
channel-member TenGigabitEthernet 0/0-1
no shutdown
Te 0/4 connects to the access switch A1.
Dell-2#sh run int te0/4
interface TenGigabitEthernet 0/4
description To_Access_Switch_A1_fa0/13
938
Virtual Link Trunking (VLT)