Como configurar ERPS Datacom

Visão Geral

O protocolo Ethernet Ring Protection Switching (ERPS) é descrito pela norma ITU-T G.8032/Y.1344. Ele é um mecanismo para fornecer proteção contra loops e recuperação de tráfego em redes que utilizam topologia em anel. O tempo de convergência do tráfego é de aproximadamente 50ms, podendo variar de acordo com a quantidade de equipamentos na topologia e o volume de tráfego.

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Cenário de Referência

Neste documento são descritas três topologias para o uso do ERPS:

• Cenário 01: Topologia simples em anel com proteção ERPS.
• Cenário 02: Topologia com anel e subanel, utilizando virtual-channel.
• Cenário 03: Topologia com anel principal e subanel com compartilhamento de link.

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Configurações

A configuração do ERPS nos equipamentos DATACOM é semelhante à configuração do protocolo EAPS, com a principal diferença de que o ERPS pode proteger topologias mais complexas, como o Cenário 2. A configuração envolve:

• VLAN de controle: usada para troca de mensagens do protocolo.
• vlan-group: define as VLANs protegidas.
• Interfaces: configuradas como node ou rpl (Ring Protection Link).

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Exemplos de Configuração

Cenário 01

Topologia em anel simples.

DM4004-01:

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 2/25 2/26

vlan-group 1
  vlan-group 1 vlan range 1 4092
  vlan-group 1 vlan 4094

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 rpl ethernet 2/25
  erps 0 port1 node ethernet 2/26
  erps 0 protected-vlans vlan-group 1

DM4004-02:

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 2/25 2/26

vlan-group 1
  vlan-group 1 vlan range 1 4092
  vlan-group 1 vlan 4094

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 node ethernet 2/25
  erps 0 port1 node ethernet 2/26
  erps 0 protected-vlans vlan-group 1

DM4001-01:

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 1/25 1/26

vlan-group 1
  vlan-group 1 vlan range 1 4092
  vlan-group 1 vlan 4094

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 node ethernet 1/25
  erps 0 port1 node ethernet 1/26
  erps 0 protected-vlans vlan-group 1

DM4001-02:

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 1/25 1/26

vlan-group 1
  vlan-group 1 vlan range 1 4092
  vlan-group 1 vlan 4094

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 node ethernet 1/25
  erps 0 port1 node ethernet 1/26
  erps 0 protected-vlans vlan-group 1

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Cenário 02

Topologia com subanel e virtual-channel.

DM4004-01:

interface vlan 4092
  name VIRTUAL-CHANNEL
  set-member tagged ethernet range 2/25 2/26
  set-member tagged ethernet 3/26

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 2/25 2/26

interface vlan 4094
  name ERPS-1
  set-member tagged ethernet 2/26
  set-member tagged ethernet 3/26

vlan-group 1
  vlan-group 1 vlan range 1 4091

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 rpl ethernet 2/25
  erps 0 port1 node ethernet 2/26
  erps 0 protected-vlans vlan-group 1

erps 1
  erps 1 control-vlan id 4094
  erps 1 name ERPS-1
  erps 1 port0 rpl ethernet 3/26
  erps 1 port1 virtual-channel control-vlan 4092 id 1
  erps 1 protected-vlans vlan-group 1

DM4004-02:

interface vlan 4092
  name VIRTUAL-CHANNEL
  set-member tagged ethernet range 2/25 2/26
  set-member tagged ethernet 3/25

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet range 2/25 2/26

interface vlan 4094
  name ERPS-1
  set-member tagged ethernet 2/26
  set-member tagged ethernet 3/26

vlan-group 1
  vlan-group 1 vlan range 1 4091

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 node ethernet 2/25
  erps 0 port1 node ethernet 2/26
  erps 0 protected-vlans vlan-group 1

erps 1
  erps 1 control-vlan id 4094
  erps 1 name ERPS-1
  erps 1 port0 node ethernet 2/26
  erps 1 port1 virtual-channel control-vlan 4092 id 1
  erps 1 protected-vlans vlan-group 1

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Cenário 03

Topologia com anel principal e subanel compartilhado.

DM4001-01:

interface vlan 4092
  name VIRTUAL-CHANNEL
  set-member tagged ethernet 1/25
  set-member tagged ethernet 1/27

interface vlan 4093
  name ERPS-0
  set-member tagged ethernet 1/25
  set-member tagged ethernet 1/27

interface vlan 4094
  name ERPS-1
  set-member tagged ethernet range 1/25 1/27

vlan-group 1
  vlan-group 1 vlan range 1 4092

erps 0
  erps 0 control-vlan id 4093
  erps 0 name ERPS-0
  erps 0 port0 rpl ethernet 1/27
  erps 0 port1 node ethernet 1/25
  erps 0 protected-vlans vlan-group 1

erps 1
  erps 1 control-vlan id 4094
  erps 1 name ERPS-1
  erps 1 port0 rpl ethernet 1/26
  erps 1 port1 virtual-channel control-vlan 4092 id 1
  erps 1 protected-vlans vlan-group 1

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Verificações

Comandos básicos para análise da configuração:

show erps
show erps id <0-63>
show erps detail
show running-config | include vlan-group|erps

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