Dell Configuration Guide for the S4048–ON System 9.14.2.6

Example of Configuring VLT

Configure the VLT domain with the same ID in VLT peer 1 and VLT peer 2.

Dell-2(conf)#vlt domain 5
Dell-2(conf-vlt-domain)#

Dell-4(conf)#vlt domain 5
Dell-4(conf-vlt-domain)#

Configure the VLTi between VLT peer 1 and VLT peer 2.

1. You can configure the LACP/static LAG between the peer units (not shown).
2. Configure the peer-link port-channel in the VLT domains of each peer unit.

Dell-2(conf)#interface port-channel 1
Dell-2(conf-if-po-1)#channel-member TenGigabitEthernet 1/4-1/7
Dell-4(conf)#interface port-channel 1
Dell-4(conf-if-po-1)#channel-member TenGigabitEthernet 1/4-1/7

Configure the backup link between the VLT peer units.

1. Configure the peer 2 management ip/ interface ip for which connectivity is present in VLT peer 1.
2. Configure the peer 1 management ip/ interface ip for which connectivity is present in VLT peer 2.

Dell-2#show running-config vlt
!
vlt domain 5
  peer-link port-channel 1
  back-up destination 10.11.206.58


Dell-2# show interfaces managementethernet 1/1
Internet address is 10.11.206.43/16

Dell-4#show running-config vlt
!
vlt domain 5
  peer-link port-channel 1
  back-up destination 10.11.206.43
Dell-4#
Dell-4#show running-config interface managementethernet 1/1
ip address 10.11.206.58/16
  no shutdown

Configure the VLT links between VLT peer 1 and VLT peer 2 to the Top of Rack unit. In the following example, port Te 1/4 in VLT peer 1 is connected to Te 1/8 of ToR and port Te 1/18 in VLT peer 2 is connected to Te 1/30 of ToR.

1. Configure the static LAG/LACP between the ports connected from VLT peer 1 and VLT peer 2 to the Top of Rack unit.
2. Configure the VLT peer link port channel id in VLT peer 1 and VLT peer 2.
3. In the Top of Rack unit, configure LACP in the physical ports (shown for VLT peer 1 only. Repeat steps for VLT peer 2. The bold vlt-peer-lag port-channel 2 indicates that port-channel 2 is the port-channel id configured in VLT peer 2).

Dell-2#show running-config interface tengigabitethernet 1/4
!
interface TenGigabitEthernet 1/4
  no ip address
!
  port-channel-protocol LACP
    port-channel 2 mode active
  no shutdown

configuring VLT peer lag in VLT
Dell-2#show running-config interface port-channel 2
!
interface Port-channel 2
  no ip address
  switchport
  vlt-peer-lag port-channel 2
  no shutdown

Dell-2#show interfaces port-channel 2 brief
Codes: L - LACP Port-channel

   LAG  Mode  Status  Uptime    Ports
L  2    L2L3  up      03:33:14  Te 1/4 (Up)

In the ToR unit, configure LACP on the physical ports.

s60-1#show running-config interface tengigabitethernet 1/8
!
interface TenGigabitEthernet 1/8
  no ip address
!
  port-channel-protocol LACP
    port-channel 100 mode active
  no shutdown

s60-1#show running-config interface tengigabitethernet 1/30
!
interface TenGigabitEthernet 1/30
no ip address
!
  port-channel-protocol LACP
    port-channel 100 mode active
  no shutdown


s60-1#show running-config interface port-channel 100
!
interface Port-channel 100
  no ip address
  switchport
  no shutdown

s60-1#show interfaces port-channel 100 brief
Codes: L - LACP Port-channel

   LAG  Mode  Status  Uptime    Ports
L  100  L2    up      03:33:48  Te 1/8 (Up)
                                Te 1/30 (Up)

Verify VLT is up. Verify that the VLTi (ICL) link, backup link connectivity (heartbeat status), and VLT peer link (peer chassis) are all up.

DellEMC#show vlt br
VLT Domain Brief
------------------
 Domain ID                              : 1
 Role				                         : Secondary
 Role Priority                          : 32768
 ICL Link Status                        : Up
 HeartBeat Status                       : Up
 VLT Peer Status                        : Up
 Version                                : 6(3)
 Local System MAC address               : 00:01:e8:8a:e9:91
 Remote System MAC address              : 00:01:e8:8a:e9:76
 Remote system version                  : 6(3)
 Delay-Restore timer                    : 90 seconds

 Delay-Restore Abort Threshold          : 60 seconds
 Peer-Routing                           : Disabled
 Peer-Routing-Timeout timer             : 0 seconds
 Multicast peer-routing timeout         : 150 seconds
 DellEMC#

Verify that the VLT LAG is up in VLT peer unit.

Dell-2#show interfaces port-channel 2 brief
Codes: L - LACP Port-channel

  LAG  Mode  Status  Uptime    Ports
L 2    L2L3  up      03:43:24  Te 1/4 (Up)

Dell-4#show interfaces port-channel 2 brief
Codes: L - LACP Port-channel

  LAG  Mode  Status  Uptime    Ports
L 2    L2L3  up      03:33:31  Te 1/18 (Up)