WeOS
5.20.1

# Single consist net with two redundant ETB nodes HowTo

## Introduction

This document describes how to configure a single CN managed by two redundant ETBNs in a single consist.

See Figure 1 below

          .---------------------------.
         /            UUID             \ cst1
         '-----------------------------'
            .-------.    .-------.
          --+       +----+       +--     dir1 = (ethX5, ethX6)
      <-dir1| etbn1 |    | etbn2 |dir2-> dir2 = (ethX7, ethX8)
          --+       +----+       +--
            '---+---'    '-------'
                |            |
            ----+------------+---- CN1 vlan10 (ethX3)

Figure 1: A single consist with one consist net managed by two redundant ETB nodes.

NOTE: In order to get two ETB nodes to manage a single consist net, they both need to have the exact same configuration with respect to uuid, node and ecn configuration.

Both nodes also need to have VRRP configured and enabled on the CN side.

## ETB Configuration

Start with ETB node 1 (etbn1) in the consist and configure vlans and the TTDP part.

    etbn1:#> configure
    etbn1:/config/#> vlan 10
    Creating new VLAN vid:10 with name: vlan10
    etbn1:/config/vlan-10/#> untagged ethX3
    etbn1:/config/vlan-10/#> end
    etbn1:/config/#> iface vlan10
    etbn1:/config/iface-vlan10/#> no inet
    etbn1:/config/iface-vlan10/#> inet static 10.0.0.1/18
    etbn1:/config/iface-vlan10/inet-static-10.0.0.1/#> end
    etbn1:/config/iface-vlan10/#> end
    etbn1:/config/#> ttdp
    Activating TTDP with default settings.
    DNS Server activated>
    etbn1:/config/ttdp/#> uuid 11111111-1111-1111-1111-111111111111
    etbn1:/config/ttdp/#> node 1 ecn 1
    etbn1:/config/ttdp/#> node 2 ecn 1
    etbn1:/config/ttdp/#> ecn 1 vlan10
    etbn1:/config/ttdp/#> dir1 ethX5,ethX6
    Remember to manually set mdi/mdi-x mode
      in port settings for all agg ports.
    etbn1:/config/ttdp/#> dir2 ethX7,ethX8
    Remember to manually set mdi/mdi-x mode
      in port settings for all agg ports.
    etbn1:/config/ttdp/#> local-id 1
    etbn1:/config/ttdp/#> end
    TTDP: Created VLAN 492. Note that this VLAN will not be deleted automatically
      if TTDP is deactivated.
    etbn1:/config/#> vlan 2
    Creating new VLAN vid:2 with name: vlan2
    etbn1:/config/vlan-2/#> no multicast-snooping
    etbn1:/config/vlan-2/#> untagged lag-dir1,lag-dir2
    etbn1:/config/vlan-2/#> end
    etbn1:/config/#> end
    Applying configuration.
    Configuration activated.  Remember "copy run start" to save to flash (NVRAM).
    etbn1:/#>

Now, repeat the exact steps above in the second ETB node. For brevity, only the steps that differs will be shown below.

    ...
    etbn2:/config/iface-vlan10/#> inet static 10.0.0.2/18
    ...
    etbn2:/config/ttdp/#> local-id 2
    ...

Note

See Port configuration on how to set MDI/MDIX on the aggregate ports.

The next step is to configure VRRP on each node. Start with the node that will have the MASTER role.

Note

In this example, etbn1 is selected MASTER.

    etbn1:#> configure
    etbn1:/config/#> router
    etbn1:/config/router/#> vrrp cn1
    Creating new VRRP instance: cn1
    Invalid settings: Interface not set.
    etbn1:/config/router/vrrp-cn1/#> iface vlan1
    Warning: No ports have been added to the configured VLAN.
    VRRP will not work as expected with this configuration.
    Invalid settings: Invalid IPv4 address.
    etbn1:/config/router/vrrp-cn1/#> address 10.0.0.100
    Invalid settings: VRID invalid. Valid values: 1 to 255.
    etbn1:/config/router/vrrp-cn1/#> vrid 132
    etbn1:/config/router/vrrp-cn1/#> version 3
    etbn1:/config/router/vrrp-cn1/#> priority 150
    etbn1:/config/router/vrrp-cn1/#> interval 1
    etbn1:/config/router/vrrp-cn1/#> preempt delay 1
    etbn1:/config/router/vrrp-cn1/#> end
    etbn1:/config/router/#> end
    etbn1:/config/#> end
    Applying configuration.
    Configuration activated.  Remember "copy run start" to save to flash (NVRAM).
    etbn1:/#>

Repeat the same steps for etbn2 with a lower priority to make it backup.

    ...
    etbn2:/config/router/vrrp-cn1/#> priority 100
    ...

## Communication Profile configuration

For this HowTo, we will be using the following premade configuration file:

cst1 communication profile configuration

1. Transfer the communication profile configuration file to /cfg/comm-profile.json on each device.__

The cst1 configuration file to etbn1 and etbn2.

Note

Ensure the filenames are correct. That is, they should end up with the name comm-profile.json in /cfg/ on their respective device.

Note

Since the consist is a redundant consist, both configuration files must be identical in both nodes in the consist.

See SCP HowTo for instructions on how to transfer files to the device.

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