Frrp Support On Vlt; Example Scenario - Dell S6100 Configuration Manual

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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.

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 43. 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.

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.

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 different set of VLANs.

In this scenario, an FRRP ring named R1 is configured with VLT Node1 acting as the Master node and VLT Node2 as the transit node.

Simillary, an FRRP ring named R2 is configured with VLT Node2 as the master node and VLT node1 as the trasit node.

In the FRRP ring R1, the primary interface for VLT Node1 is the VLTi. P1 is the secondary interface, which is an orphan port that is

participating in the FRRP ring topology. V1 is the control VLAN through which the RFHs are exchanged indicating the health of the nodes

Force10 Resilient Ring Protocol (FRRP)