# Bonded Topology for Linux CommServe Bare Metal

Bonded topology is the most common option for Linux CommServe Bare Metal as this provides network level redundancy for each node.

In this topology, the node requires connections to 2 - 10 GbE port for data protection network, which transfers data to and from the clients being protected.

Use this procedure to deploy the Linux CommServe Bare Metal software using the 11.38 CommServe for bare metal image.

Note

Bonded topology is the most used configuration and is recommended for most deployments. The bonding can be configured to provide redundancy using either the Active-Backup bonding or the Link Aggregation Control Protocol (LACP). This can also be used with a multi-switch link aggregation protocol such as Virtual Port Channel (VPC), MLAG, or MC-LAG to provide switch level redundancy.

- Each pair will be bonded on the node, so it is treated as one logical connection. If a node encounters a cable, SFP, or network card failures, the node remains operational without any user intervention. This can optionally be setup to connect to 2 switches to provide switch level redundancy.

- Active-Backup and Link Aggregation Control Protocol (LACP) are the supported bonding modes.

  LACP requires the switch(s) to support it as well. When using LACP, each pair of ports should be configured as an active port-channel, and not configured to negotiate the aggregation protocol.

## Network Requirements

The following network names and IP addresses are required for a bonded topology:

| Node
--- | ---
Data Protection Fully Qualified Domain Name* |
Data Protection IP Address* |
Data Protection Netmask* |
Data Protection Gateway* |
Data Protection DNS 1* |
Data Protection DNS 2 |
Data Protection DNS 3 |
Data Protection NIC Port 1 Card 1 MAC Address |
Data Protection NIC Port 1 Card 2 MAC Address |

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