Concept Guide

no shutdown
!
protocol frrp 101
interface primary TengigabitEthernet 3/21
secondary TengigabitEthernet 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 congure 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 conguration 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 gure shows a simple FRRP ring inter-connecting VLT device:
Figure 41. FRRP Ring Connecting VLT Devices
You can also congure 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 conguration blocks the FRRP ring on a per VLAN or VLAN group basis enabling the conguration to spawn
across dierent set of VLANs. The FRRP conguration 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 conguration 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 trac, VLTi cannot act as the
secondary interface in an FRRP ring topology.
Example Scenario
Following example scenario describes an Active-Active FRRP ring topology where the ring is blocked on a per VLAN or VLAN group basis
allowing active-active FRRP ring for dierent set of VLANs.
Force10 Resilient Ring Protocol (FRRP)
413