Production traffic usually starts with DNS but ultimately flows to IP addresses. When VIP management is treated as nothing more than "bind to an address," the real network topology is left out of the picture. If VLAN, LACP, Bridge, V-ETH, V-ETH(peer), namespace, IPv6 and cluster failover behavior are not considered together, a VIP may appear operational while traffic does not arrive over the expected path.
In multi-VLAN environments the problem becomes more apparent. An operator first creates the VLAN on the network side, then adjusts Bond or Bridge relationships, and finally defines the VIP on the ADC. When these pieces are managed in isolation, a wrong VLAN tag, MTU mismatch, incorrect parent interface selection or missing gateway check all lead to the classic "VIP is up but no traffic" situation.
Classic VIP transition approaches are also insufficient in some scenarios. A node may appear healthy, VRRP peer communication may continue, yet the relevant link may have gone down or the gateway may have become unreachable. If the VIP stays on a device that cannot reach upstream, no failover occurs and a service outage follows.
The right model binds the VIP to the cluster, not to a physical device. Interface type, parent interface relationship, VLAN or Bond structure, IPv4/IPv6 addresses, MASTER/BACKUP role and transition method must all be defined together in the same configuration model.
TR7 VIP and IP Scenarios meets this need: it makes VIPs manageable together with network topology, cluster ownership and link/gateway awareness.
TR7 builds VIP management on an interface model, VIP communication pairing, MASTER/BACKUP distribution and multi-layer interface composition.
Ethernet, VLAN, Bond, LACP, V-ETH, V-ETH(peer) and Bridge interfaces are all defined through the same configuration approach. Only the options relevant to each type are shown, so operators cannot write the wrong network parameter into the wrong field.
A VIP communication pair is defined for each interface and cluster nodes match through those addresses. The VIP is not pinned to a single node; it is owned on whichever node holds the active cluster role.
VIPs are separated into master and backup lists. In Active-Active deployments one node holds the master VIP list and the peer holds the backup list. If a node fails, all VIPs converge on the healthy node.
Parent interface relationships, Bond members, Bridge members and virtual interface associations are all defined in the same tree. Real-world topologies such as VLAN over Bond, V-ETH inside a Bridge, or namespace-attached V-ETH(peer) are all represented in a single model.
VIP and IP Scenarios combines physical and virtual network structure with cluster-aware VIP management.
TR7 supports Ethernet, VLAN, Bond, LACP, V-ETH, V-ETH(peer) and Bridge interface types. Physical interfaces, VLAN sub-interfaces, Bond, LACP, Bridge, virtual Ethernet and virtual Ethernet pairs can all be included in the same network model. This makes the ADC a network-topology-aware management point rather than just an IP assignment layer. Operators manage the actual network layout of their production environment from the TR7 interface.
TR7 handles IPv4 and IPv6 address families together in VIP management. Both v4 and v6 addresses can run in parallel for the same service or interface. Gateway health checks can also be separated per address family. This treats IPv6 adoption as a natural extension of the existing VIP model rather than a separate project.
VLAN interfaces can be defined with a parent Ethernet, Bond or LACP interface. Each VLAN can carry its own subnet and its own VIP set. This is particularly valuable for service provider, multi-tenant and segmentation-driven architectures. Different customers or security zones are separated over the same physical link.
Bond and LACP interfaces allow multiple physical ports to operate as a single logical interface. Bond covers redundancy scenarios such as active-backup mode; LACP covers 802.3ad link aggregation. Production VIPs placed on these logical interfaces become more resilient to single-port or single-link failures. A VLAN layer can also run on top of Bond or LACP for flexible topology design.
Bridge can be used for layer-2 bridging behavior in VM or container-based network backplanes. V-ETH provides a MAC-level virtual Ethernet interface for virtualization environments. V-ETH(peer) creates a virtual Ethernet pair for namespace and container isolation. This support means TR7 operates flexibly in virtual and on-premises cloud architectures, not only on physical appliances.
VIPs are managed as cluster-owned service addresses rather than as local IP lists on a single node. VIP communication pairs and VIP objects are defined per interface. When failover occurs, VIP ownership can move to the peer node. This model preserves service addresses through both maintenance and failure scenarios.
TR7 offers four transition methods per VIP: VRRP only, TR7 link check, TR7 gateway check and TR7 link and gateway check. VRRP only uses classic protocol behavior; TR7 link check monitors the physical interface carrier state; TR7 gateway check tests upstream reachability; TR7 link and gateway check evaluates both signals together. Critical VIPs can therefore move based on real network reachability rather than just device liveness. This behavior — which typically requires custom monitoring scripts in standard deployments — is offered as a policy selection from the TR7 interface.
The master VIP list and backup VIP list are maintained separately. In an Active-Active setup one group of VIPs is active on one node while the other group is active on the peer. If a node goes down, the healthy node takes ownership of both VIP sets. This means both devices serve as active traffic sources rather than one being an idle standby.
VIP management is planned together with interface hierarchy, VRRP slots, unicast communication, namespace, zone and gateway checks.
VLAN, Bond, LACP, Bridge, V-ETH and V-ETH(peer) relationships are defined through parent interface and member interface fields. This allows compositions such as VLAN over Bond, V-ETH inside a Bridge, or namespace-attached V-ETH(peer) to be modeled accurately. Operations teams manage the network structure together with its dependencies rather than as disconnected pieces.
Two VRRP slots — MASTER and BACKUP — can be generated per interface. In Active-Active deployments this separation is the foundation of VIP distribution. virtual_router_id values are assigned automatically, reducing the risk of collisions within the same subnet.
TR7 can use a unicast approach for VRRP peer communication. This provides more predictable behavior in modern data center networks where multicast traffic is filtered. Peer node communication is defined explicitly through unicast_src_ip and unicast_peer fields.
Gateway reachability can be monitored with a health check per interface. IPv4 and IPv6 families can be checked independently. When gateway access is lost and the transition method is TR7 gateway check or TR7 link and gateway check, the failover decision takes this signal into account.
VIPs can be associated with a namespace and zone context. This makes VIP ownership more clearly defined in multi-tenant or multi-zone deployments. Separate network isolation and separate VIP management can be configured for each tenant or zone.
When a VIP fails over, a gratuitous ARP is sent to update switch MAC tables on the network side. This accelerates L2-level traffic redirection to the newly active node. It helps reduce service interruption time particularly during VIP transitions within the same subnet.
Telecom teams can define many VLANs on a trunk port and run a separate VIP set for each customer or service segment. Multiple subnets and multiple customer separations are managed over a single physical link.
Operations teams can aggregate multiple physical ports into a single LACP interface and place production VIPs on that logical interface. Service continuity is strengthened against link failure or capacity demands.
In large deployments, some VIPs can be active on one node while others run on the peer. Both devices carry live traffic, and if one node fails the healthy node takes ownership of the full VIP set.
In multi-tenant environments each tenant can be placed in its own namespace. VIPs are defined as belonging to that namespace, and tenant traffic is separated at the network plane.
Seven interface types, four failover methods and cluster-wide VIP ownership. Let us walk you through a live setup in your own environment.