DELL S50V User Manual

Virtual Router Redundancy Protocol (VRRP) | 1151

VLAN Scenario

In another scenario, VRF-1, VRF-2, and VRF-3 use a single physical interface with multiple tagged 
VLANS (instead of separate physical interfaces) to connect to the LAN. In this case, three VLANs are 
configured: VLAN-100, VLAN-200, and VLAN-300. Each VLAN is a member of one VRF. A physical 
interface (gigabitethernet 0/1) attaches to the LAN and is configured as a tagged interface in VLAN-100, 
VLAN-200, and VLAN-300. The rest of this user case is the same as the non-VLAN scenario.

This VLAN scenario often occurs in a service-provider network in which VLAN tags are configured for 
traffic from multiple customers on customer-premises equipment (CPE), and separate VRF instances 
associated with each VLAN are configured on the provider edge (PE) router in the point-of-presence 
(POP).

S2(conf)#ip vrf default-vrf 0

!

S2(conf)#ip vrf VRF-1 1

!

S2(conf)#ip vrf VRF-2 2

!

S2(conf)#ip vrf VRF-3 3

!

S2(conf)#interface GigabitEthernet 12/1

S2(conf-if-gi-12/1)#ip vrf forwarding VRF-1

S2(conf-if-gi-12/1)#ip address 10.10.1.2/24

S2(conf-if-gi-12/1)#vrrp-group 11

% Info: The VRID used by the VRRP group 11 in VRF 1 will be 177.

S2(conf-if-gi-12/1-vrid-101)#priority 255

S2(conf-if-gi-12/1-vrid-101)#virtual-address 10.10.1.2

S2(conf-if-gi-12/1)#no shutdown

!

S2(conf)#interface GigabitEthernet 12/2

S2(conf-if-gi-12/2)#ip vrf forwarding VRF-2

S2(conf-if-gi-12/2)#ip address 10.10.1.2/24

S2(conf-if-gi-12/2)#vrrp-group 11

% Info: The VRID used by the VRRP group 11 in VRF 2 will be 178.

S2(conf-if-gi-12/2-vrid-101)#priority 255

S2(conf-if-gi-12/2-vrid-101)#virtual-address 10.10.1.2

S2(conf-if-gi-12/2)#no shutdown

!

S2(conf)#interface GigabitEthernet 12/3

S2(conf-if-gi-12/3)#ip vrf forwarding VRF-3

S2(conf-if-gi-12/3)#ip address 20.1.1.6/24

S2(conf-if-gi-12/3)#vrrp-group 15

% Info: The VRID used by the VRRP group 15 in VRF 3 will be 243.

S2(conf-if-gi-12/3-vrid-105)#priority 100

S2(conf-if-gi-12/3-vrid-105)#virtual-address 20.1.1.5

S2(conf-if-gi-12/3)#no shutdown