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tagged GigabitEthernet 3/14,21
no shutdown
!
interface Vlan 201
no ip address
tagged GigabitEthernet 3/14,21
no shutdown
!
protocol frrp 101
interface primary GigabitEthernet 3/21
secondary GigabitEthernet 3/14 control-vlan 101
member-vlan 201
mode transit
no disable
FRRP Support on VLT
Using FRRP rings, you can inter-connect VLT domains across data centers.
These FRRP rings make use of Layer2 VLANs that spawn across Data Centers and provide resiliency by detecting node or link
level failures.
You can configure a simple FRRP ring that connects a VLT device in one data center to a VLT devices in two or more Data
Centers.
NOTE: This configuration connects VLT devices across Data Centers using FRRP; however, the VLTi may or may not
participate as a ring interface of any FRRP ring.
Following figure shows a simple FRRP ring inter-connecting VLT device:
Figure 40. FRRP Ring Connecting VLT Devices
You can also configure an FRRP ring where both the VLT peers are connected to the FRRP ring and the VLTi acts as the
primary interface for the FRRP Master and transit nodes.
This active-active FRRP configuration blocks the FRRP ring on a per VLAN or VLAN group basis enabling the configuration to
spawn across different set of VLANs. The FRRP configuration where VLTi nodes act as the primary or secondary interfaces
ensure that all the optics used to connect VLT domains across data centers are fully utilized.
The primary requirement for the active-active FRRP configuration to work is that the VLTi between two VLT peers must act as
the primary interface of the Master and transit nodes of the FRRP ring.
NOTE:
As the secondary interface of the FRRP master node is blocked for member VLAN traffic, VLTi cannot act as the
secondary interface in an FRRP ring topology.
NOTE: For more information on how to configure FRRP, see FRRP Configuration
NOTE: For more information on configuring VLT between 2 devices, see Configuring VLT
Force10 Resilient Ring Protocol (FRRP) 303