Layer 2 control protocols

STP/RSTP/MSTP (assuming Spanning Tree is not enabled if the ingress SAP is attached to a VPLS service)

LAMP

MAC specific control protocols

provider bridge group address

provider bridge MVRP address

PAUSE frames

PAUSE frames are transmitted to request backward direction flow control. By default, SR OS peers pause frames on reception and pause the transmit side of the port. On some ports, this behavior can be changed to discard PAUSE frames. For applicable ports, use the following command to discard PAUSE frames:

• MD-CLI

  configure port ethernet discard-rx-pause-frames true

• classic CLI

  configure port ethernet discard-rx-pause-frames

PAUSE frames are never tunneled.

PAUSE frames are identified as frames with Ethertype (0x8808).

LACP frames

If the port is part of a LAG, the LACP frames are peered. If the port is not part of a LAG, the LACP frames are discarded or tunneled based on the configuration of the following command.

configure port ethernet lacp-tunnel

LACP frames are identified as frames with Ethertype (0x8809) and the slow-protocol subtype (0x01).

EFM-OAM frames

If the port has EFM-OAM processing enabled, the EFM-OAM frames are peered. If EFM-OAM processing is not enabled on the port, the EFM-OAM frames are discarded or tunneled based on the configuration of the following command.

configure port ethernet efm-oam tunneling

EFM-OAM frames are identified as frames with Ethertype (0x8809) and the slow-protocol sub-type (0x03).

ESMC frames

If the port is an input reference to the central frequency clock, the ESMC frames are peered. If the port is not an input reference to the central frequency clock, the ESMC frames are discarded. Use the following command to override the preceding scenarios and tunnel the ESMC frames:

• MD-CLI

  configure port ethernet ssm esmc-tunnel true

• classic CLI

  configure port ethernet ssm esmc-tunnel

ESMC frames are identified as frames with Ethertype (0x8809) and the slow-protocol sub-type (0x0A).

802.1x frames

By default, the 802.1x frames are extracted when they are received. For extracted frames, if a RADIUS server is configured, the frames are peered; otherwise, they are discarded. Use the following command to override the extraction and tunnel the 802.1x frames:

• MD-CLI

  configure port ethernet dot1x tunneling true

• classic CLI

  configure port ethernet dot1x tunneling

802.1x frames are identified as frames with Ethertype (0x888E).

E-LMI frames

If Ethernet Local Management Interface (E-LMI) processing is enabled on the port, E-LMI frames are peered. Otherwise, the E-LMI frames are dropped from VPLS and tunneled for Epipe.

E-LMI frames from VPLS are tunneled when the following is the case:

• the following command is included in the service

  configure service vpls tunnel-elmi

• the following command is not enabled on the port

  configure port ethernet elmi

• the encapsulation of the E-LMI frame matches the VPLS service tagging

E-LMI frames are identified as frames with Ethertype (0x88EE) and a destination MAC address of 01:80:C2:00:00:07.

LLDP frames

If LLDP processing is enabled on the port, LLDP frames are peered. Otherwise, LLDP frames are discarded or tunneled based on the configuration of the following command.

configure port ethernet lldp dest-mac tunnel-nearest-bridge

LLDP frames are identified as frames with Ethertype (0x88CC) and destination MAC address of 01-80-C2-00-00-0E.

PTP peer delay frames

If the port is configured in the router as an active port within the PTP process, the frames are peered; otherwise, the frames are tunneled.

PTP message frames are identified as frames with Ethertype (0x88F7).