Deployment Guide

ip ospf network point-to-point
no shutdown
The following is the OSPF configuration on Dell-3.
router ospf 1
router-id 3.3.3.3
network 10.10.101.0/30 area 0
network 10.10.102.0/30 area 0
The following output shows that Dell-4 and VLT domain 120 form OSPF neighborship with Dell-3.
Dell-3#sh ip ospf nei
!
Neighbor ID Pri State Dead Time Address Interface Area
4.4.4.4 1 FULL/ - 00:00:33 10.10.101.1 Vl 101 0
1.1.1.1 1 FULL/ - 00:00:34 10.10.102.2 Vl 102 0
Dell-4 VLT Configuration
vlt domain 110
peer-link port-channel 110
back-up destination 10.1.1.0
primary-priority 24576
system-mac mac-address 02:01:e8:d8:93:02
unit-id 1
peer-routing
! proxy-gateway static
remote-mac-address 00:01:e8:d8:93:07
remote-mac-address 00:01:e8:d8:93:e5
These MAC addresses are the system L2 interface addresses for each switch at the remote site, Dell-1 and Dell-2.
interface Vlan 102
description ospf peering vlan to DELL-3
ip address 10.10.102.2/30
ip ospf network point-to-point
no shutdown
The following is the OSPF configuration on Dell-4.
router ospf 1
router-id 1.1.1.1
network 10.10.102.0/30 area 0
The following output shows that Dell-4 forms OSPF neighborship with Dell-3.
ELEM-2#sh ip ospf nei
!
Neighbor ID Pri State Dead Time Address Interface Area
3.3.3.3 1 FULL/ - 00:00:32 10.10.102.1 Vl 102
With the above configuration, the two VLT domains act as VLT proxy gateways for any host that is moved from one VLT
domain to another.
Configure BFD in VLT Domain
Dell EMC Networking OS supports Bidirectional Forwarding Detection (BFD) to detect communication failures on an interface
that is a part of a VLT link aggregation group (LAG).
In VLT domain, BFD provides high availability path when there are communication failures in any one of the VLT LAG links.
The VLT nodes and top of rack (ToR) use the VLT LAG links to carry the BFD packets. When any one of the VLT LAG links
connected to the ToR is down, the BFD packets reach the VLT primary or secondary using the VLTi (ICL) link.
1008
VLT Proxy Gateway