Administrator Guide

Table Of Contents
configured (for example, M11 through Mn) that carry the data traffic across the FRRP rings. The secondary port P1 is tagged to
the control VLAN (V1). VLTi is implicitly tagged to the member VLANs when these VLANs are configured in the VLT peer.
As a result of the VLT Node1 configuration on R2, the FRRP ring R2 becomes active. The primary interface VLTi and the
secondary interface P1 act as forwarding ports for the member VLANs (M11 to Mn).
VLT Node2 is the master node. The primary interface for VLT Node2 is VLTi. P2 is the secondary interface, which is one of the
orphan port participating in the FRRP ring. V1 is the control VLAN through which the RFHs are exchanged. In addition to the
control VLAN, multiple member VLANS are configured (for example, M1 to M10) that carry the data traffic across the FRRP
rings. The secondary port P2 is tagged to the control VLAN (V1). VLTi is implicitly tagged to the member VLANs when these
VLANs are configured in the VLT peer.
As a result of the VLT Node2 configuration on R2, the secondary interface P2 is blocked for the member VLANs (M11 to Mn).
Following figure illustrated the FRRP Ring R1 topology:
Figure 41. FRRP Ring using VLTi links
Important Points to Remember
VLTi can be configured only as the primary interface for the primary interface of any FRRP ring.
Only RSTP and PVST are supported in the VLT environment. Enabling either RSTP or PVST effects FRRP functionality even
though these features are disabled on FRRP enabled interfaces.
Dell EMC Networking OS does not support coexistence of xSTP and FRRP configurations. Meaning, if there is any active
FRRP ring in the system, then you cannot enable xSTP in the system globally or at the interface level. Similarly, if xSTP is
enabled, then you cannot configure FRRP in the system.
You cannot configure VLT LAG interfaces as FRRP ring interfaces.
When ICL is configured as an FRRP ring interface, you cannot remove ICL and VLT domain configurations.
When FRRP is enabled on a VLT domain, you cannot enable any flavor of the spanning tree protocol (STP) concurrently on
the nodes corresponding to that VLT domain. Meaning, FRRP and xSTP cannot coexist in a VLT environment.
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Force10 Resilient Ring Protocol (FRRP)