Packet data unit (PDU) structure for supporting distributed relay control protocol (DRCP)
A method supporting distributed resilient network interconnect (DRNI) in a link aggregation group at a network device is disclosed. The method starts with encapsulating a distributed relay control protocol data unit (DRCPDU) in a frame, wherein the DRCPDU includes a protocol data unit (PDU) structure. The PDU structure includes a type field indicating that the DRCPDU is for DRCP, a version field indicating a version number of the DRCP, and a set of type/length/values (TLVs) including: a terminator TLV indicating an end of the PDU structure, a portal information TLV indicating characteristics of the first portal, a portal configuration information TLV indicating configuration information of the first portal, a DRCP state TLV indicating variables associated with an intra-portal link (IPP), a home ports information TLV and a neighbor ports information TLV. The method continues with transmitting the frame encapsulating the DRCPDU from the network device to a neighbor network device.
1. A method supporting a distributed resilient network interconnect (DRNI) at a network device, wherein the network device and a neighbor network device are included in the DRNI of a link aggregation group (LAG), wherein the network device is coupled to the neighbor network device via a port, the method comprising:
encapsulating a distributed relay control protocol data unit (DRCPDU) in a frame, wherein the DRCPDU includes a protocol data unit (PDU) structure, including:
a type field indicating that the DRCPDU is for distributed relay control protocol (DRCP),
a version field indicating a version number of the DRCP,
an aggregator priority field indicating a priority corresponding to an aggregator of the network device,
an aggregator field indicating a value corresponding to the aggregator,
an aggregator key field indicating an aggregator key value of the aggregator,
a neighbor type/length/value (TLV) indicating a neighbor information field, and
a terminator TLV indicating an end of the PDU structure; and
transmitting the frame encapsulating the DRCPDU from the network device to the neighbor network device via the port.
2. The method of claim 1 , wherein the value corresponding to the aggregator is a media access control (MAC) address of actor system identifier.
3. The method of claim 1 , wherein the terminator TLV includes a TLV type field indicating a value of zero.
4. The method of claim 1 , wherein the PDU structure further includes a field indicating gateway information.
5. The method of claim 1 , wherein the PDU structure further includes a field indicating a variable for the port.
6. The method of claim 1 , wherein the PDU structure further includes an organization specific TLV that indicates a TLV type, an organization specific length, an identifier, and a subtype.
7. The method of claim 1 , wherein the PDU structure further includes a flag indicating whether a receive machine for the DRCP is in an expired state.
8. A network device supporting a distributed resilient network interconnect (DRNI), wherein the network device and a neighbor network device are included in the DRNI of a link aggregation group (LAG), wherein the network device is coupled to the neighbor network device via a port, the network device comprising:
ports coupled to one or more physical or aggregation links of the link aggregation group; and
a processor coupled to the ports, operative to cause transmission of a frame encapsulating a distributed relay control protocol data unit (DRCPDU) from the network device to the neighbor network device via the port,
wherein the DRCPDU includes a protocol data unit (PDU) structure, including:
a type field indicating that the DRCPDU is for distributed relay control protocol (DRCP),
a version field indicating a version number of the DRCP,
an aggregator priority field indicating a priority corresponding to an aggregator of the network device,
an aggregator field indicating a value corresponding to the aggregator,
an aggregator key field indicating an aggregator key value of the aggregator,
a neighbor type/length/value (TLV) indicating a neighbor information field, and
a terminator TLV indicating an end of the PDU structure.
9. The network device of claim 8 , wherein the value corresponding to the aggregator is a media access control (MAC) address of actor system identifier.
10. The network device of claim 8 , wherein the terminator TLV includes a TLV type field indicating a value of zero.
11. The network device of claim 8 , wherein the PDU structure further includes a field indicating gateway information.
12. The network device of claim 8 , wherein the PDU structure further includes a field indicating a variable for the port.
13. The network device of claim 8 , wherein the PDU structure further includes an organization specific TLV that indicates a TLV type, an organization specific length, an identifier, and a subtype.
14. The network device of claim 8 , wherein the PDU structure further includes a flag indicating whether a receive machine for the DRCP is in an expired state.