1. Design of a Diversified Router: Packet Formats
John DeHart

2. Revision History
6/2/06 (JDD):
created

3. Internal Packet Format
DAddr (6B)
SAddr (6B)
Type=802.1Q (2B)
VLAN (2B)
Type=Substrate (2B)
Ethernet Header
Destination MPE/MI (2B)
Substrate Header
Source MPE/MI (2B)
Shim
Metanet Frame Len (2B)
Metanet Frame
(Metanet Frame Len Bytes)
Flags (10b)
Shim Data Length (6b)
Ethernet Trailer (Pad+CRC)
Shim Data (0-63B)
MPE: Meta Processing Element
MI: Meta Interface
MetaNet Frame Length: Length of Metanet Frame in Bytes
Does not include Shim

4. LC  MPE Internal Format
Metanet Frame
(Metanet Frame Len Bytes)
Ethernet Trailer (Pad+CRC)
DAddr (6B)
SAddr (6B)
Type=802.1Q (2B)
VLAN (2B)
Type=Substrate (2B)
Destination MPE (2B)
RxMI (2B)
Metanet Frame Len (2B)
Flags (10b) = 0
Shim Data Length (6b) = 0
Shim Data (0-63B)
MPE
Destination MPE: ID of receiving MPE
RxMI: Receive Meta Interface
Shim: So far, no uses of shim have been defined for LC  MPE
Flags = 0, Shim Data Length = 0  null/empty shim.

5. MPE  LC Internal Format
Metanet Frame
(Metanet Frame Len Bytes)
Ethernet Trailer (Pad+CRC)
DAddr (6B)
SAddr (6B)
Type=802.1Q (2B)
VLAN (2B)
Type=Substrate (2B)
TxMI (2B)
Source MPE (2B)
Metanet Frame Len (2B)
Flags (10b)
Shim Data Length (6b)
Shim Data (0-63B)
MPE LC
Source MPE: ID of sending MPE
TxMI: Transmit Meta Interface
Shim: May contain MN Address for ARP or Ethernet broadcast of multicast address

6. MPE  MPE Internal Format
Metanet Frame
(Metanet Frame Len Bytes)
Ethernet Trailer (Pad+CRC)
DAddr (6B)
SAddr (6B)
Type=802.1Q (2B)
VLAN (2B)
Type=Substrate (2B)
Destination MPE (2B)
Source MPE (2B)
Metanet Frame Len (2B)
Flags (10b)
Shim Data Length (6b)
Shim Data (0-63B)
MPE
MPE
Destination MPE: ID of receiving MPE
Source MPE: ID of sending MPE
Shim: MR specific information, things like exception packet indicators, etc.

7. Pkt Format Delivered by Substrate to MPE
Metanet Frame
(Metanet Frame Len Bytes)
Destination MPE (2B)
RxMI (2B)
Metanet Frame Len (2B)
Flags (10b)
Shim Data Length (6b)
Shim Data (0-63B)
In a shared NPU case:
MR will not receive the Ethernet header
Destination MPE should be id of MR MPE receiving packet

8. Extra
The next set of slides are for templates or extra information if needed

9. Text Slide Template

10. Image Slide Template