ANSI SCTE 136-1:2019 pdf free download – Layer 2 Virtual Private Networks for IP Cable Modem Systems
An operation of an L2 Bridge in which it replicates an L2PDU addressed to a group MAC or unlearned individual MAC address to all Bridge Ports other than the L2PDU’s ingress port. An IEEE 6-byte MAC address with the first tansmitted bit (the group bit) set to 1, indicating that the address refers to a group of MAC hosts. In the canonical representation of MAC addresses used for Ethernet transmission, the Group bit is the least significant bit of the first byte. The all-ls broadcast MAC address is considered to be a GMAC address. An IEEE 6-byte MAC address with the first transmitted bit (the group bit) set to 0, indicating that the address refers to a single MAC host. For the Ethernet MAC addresses of DOCSIS, the group bit is the least significant bit of the first byte of the MAC address. A network clement that forwards layer 2 packets from one L2 interface to another L2 interface. A Layer 2 Forwarder may operate in Point-to-Point or Multipoint forwarding mode, ie, forwarding between only two interfaces without learning; or Multipoint, forwarding unicast- destined packets only to the interface from which a MAC address was learned. A physical interface port or virtual circuit on which an L2PDU is transmitted. Physical L2 interface ports include an Ethernet NSI at a CMTS or the CMCI port at a CM. Virtual circuit L2 Interfaces include a CMTS Network System Interface (NSI) PseudoWire (PW) and a CMTS single-CM BPI Security Association. An L2 Interface may or may not have an ifIndex assigned to it. A sequence of bytes consisting of a Destination MAC Address (DMAC), Source MAC Address (SMAC), (optional) Tag Header(s), EtherType/Length, L2 Payload, and CRC. k A set of LANs and the L2 Forwarders between them that enable hosts attached to the LANs to communicate with Layer 2 Protocol Data Units (L2PDUs). A single L2VPN forwards L2PDUs based only on the Destination MAC (DMAC) address of the L2PDU, transparent to any IP or other Layer 3 address. A cable operator administrative domain supports multiple L2VPNs
An octet string that uniquely identifies an L2VPN within a cable operator administrative domain, corresponding to a single subscriber enterprise. A network element that forwards a Layer 3 PDU from an ingress interface to one or more egress interfaces. Also called a Router. An operation of a layer 2 Bridge by which it associates the Source MAC (SMAC) address of an incoming L2PDU with the Bridge Port ftom which it arrived. An L2VPN for the post- registration SNMP traffic to eCM or eSAFE devices. May be combined with a Provisioning L2VPN. Operation of an L2 Forwarder among multiple L2 networks that forwards individual MAC destined packets only to the interface from which a source MAC address was learned and that floods group MAC destined packets to all interfaces. A CM that does not implement this DOCSIS L2VPN standard. Operation of an L2 Forwarder between only two L2 networks with no source MAC address learning. An L2VPN for the pre-registration traffc of DHCP, TOD, and TFTP that provisions eCMs and eSAFE hosts. May be combined with a Management L2VPN. An association between the CMTS and a set of CMs in a MAC Domain that enables encrypted communication between the CMTS and the CM set. A Single CM SA is one with a single CM, and enables a private point-to-point L2 Network connection between the CMTS and the CPE LAN of that CM. A Security Association Descriptor (SA-Descriptor) is a multiple-part message element defined in the DOCSIS Baseline Privacy standard [BPI+] that includes a Security Association ID (SAID).