Layer 2 Control Protocol Transparency for EVPN

Benefits of L2CP Transparency

Adopting L2CP transparency promotes the interoperability of equipment between subscriber networks and carrier networks.

MEF Service Definitions

MEF defines Ethernet Private LAN (EP-LAN) as a port-based service that supports all-to-one bundling. This allows multiple VLANs to be mapped into a single Ethernet Virtual Circuit. Ethernet Virtual Private LAN (EVP-LAN) is a VLAN-based service where VLAN ID identifies the traffic. Table 2 lists and maps the MEF service type to the supported EVPN configuration on Junos OS Evolved devices.

EVPN-MPLS E-LAN Services

Table 3 lists the reserved MAC address, the L2CP assigned to those MAC addresses, and the actions required for EVPN E-LAN services.

Configure a Filter for EVPN MPLS E-LAN Services

Configure a discard filter for EP-LAN or EVP-LAN for EVPN MPLS E-LAN services as follows:

1. Configure a firewall filter to discard traffic that matches the reserved destination MAC address for family ethernet-switching.

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   set firewall family ethernet-switching filter name term name from destination-mac-address mac-address
   set firewall family ethernet-switching filter name term name then discard.
   

   Note:

   You must configure a firewall filter to match the destination MAC address and ethertype for the following protocol.

   • Pause

   • LACP

   • LAMP

   • Link OAM

   • ESMC

   • 802.1X

   • E-LMI

   • LLDP

   • PTP Peer Delay

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   set firewall family ethernet-switching filter name term name from destination-mac-address mac-address
   set firewall family ethernet-switching filter name term name from ether-type value.
   set firewall family ethernet-switching filter name term name then discard.
   

2. Apply the firewall filter to the interface.

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   set interfaces interface-name unit n family ethernet-switching filter name

The following is the sample firewall filter configuration for discarding the LACP Ethernet frames. The filter is applied to the EP-LAN interface.

set firewall family ethernet-switching filter eplan term lacp from destination-mac-address 01:80:c2:00:00:02/48
set firewall family ethernet-switching filter eplan term lacp from ether-type 0x8809
set firewall family ethernet-switching filter eplan term lacp then discard
set interfaces et-0/0/1 unit 0 family ethernet-switching filter input eplan

EVPN-VPWS E-LINE Service

Table 4 lists the reserved MAC address, L2CP assigned to those MAC addresses, and the actions required for EVPN VPWS (E-LINE) services. MEF allows different actions for some EP-LAN services on EVPN-VPWS and defines the two options for those protocols as Option 1 and Option 2.

Configure a Filter for EVPN-VPWS Services

Configure a discard filter for EP-LAN (Option 1 or Option 2) or EVP-LAN for EVPN VPWS services as follows:

1. Configure a firewall filter to discard traffic that matches the reserved destination MAC address for family ccc.

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   set firewall family ccc filter name term name from destination-mac-address mac-address
   set firewall family ccc filter name term name then discard.
   

   Note:

   You must configure a firewall filter to match the destination MAC address and ethertype for the following protocol.

   • Pause

   • LACP

   • LAMP

   • Link OAM

   • ESMC

   • 802.1X

   • E-LMI

   • LLDP

   • PTP Peer Delay

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   set firewall family ccc filter name term name from destination-mac-address mac-address
   set firewall family ccc filter name term name from ether-type value.
   set firewall family ccc filter name term name then discard.
   

2. Apply the firewall filter to the interface.

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   set interfaces interface-name unit n family ccc filter name

The following is the sample firewall filter configuration for discarding provider bridge group address Ethernet frames. The filter is applied to the EP-LAN interface.

set firewall family ccc filter epl_option_1 term pbga from destination-mac-address 01:80:c2:00:00:08/48
set firewall family ccc filter epl_option_1 term pbga then discard
set interfaces et-0/0/3 unit 0 family ccc filter input epl_option_1