10 Gigabit Ethernet WAN PHY Alternatives IEEE 802.3 HSSG November 9-10, 1999 Kauai, HI Norival Figueira, Paul Bottorff Nortel Networks Tom Palkert AMCC IEEE 802.3 HSSG, November 9-10, 1999 - 0 10GE WAN PHY Objectives • Support a speed of 10.0000 Gb/ s at the MAC/ PLS service interface • Define two families of PHYs: — A LAN PHY, operating at a data rate of 10.0000 Gb/ s — A WAN PHY, operating at a data rate compatible with the payload rate of OC-192c/ SDH VC- 4- 64c • Define a mechanism to adapt the MAC/ PLS data rate to the data rate of the WAN PHY IEEE 802.3 HSSG, November 9-10, 1999 - 1 Common Requirement 10 Gigabit Ethernet Reference Model Upper Layers MAC Control (Optional) Media Access Control (MAC) Mechanism to adapt Reconciliation the MAC/ PLS data rate XGMII to the data rate of the Physical Coding Sublayer (PCS) WAN PHY Physical Medium Attachment (PMA) Physical Medium Dependent (PMD) MEDIUM IEEE 802.3 HSSG, November 9-10, 1999 - 2 Some 10GE WAN PHY Alternatives • 8B/10B • MB810 • One polynomial scrambler • Two polynomial scrambler IEEE 802.3 HSSG, November 9-10, 1999 - 3 8B/10B: Possible Architecture 10 Gigabit Ethernet Reference Model Upper Layers MAC Control (Optional) Media Access Control (MAC) Reconciliation Special code-groups XGMII MAC packet delineation Physical Coding Sublayer (PCS) 8B/10B coding / Physical Medium Attachment (PMA) alignment Physical Medium Dependent (PMD) MEDIUM IEEE 802.3 HSSG, November 9-10, 1999 - 4 MB810: Possible Architecture 10 Gigabit Ethernet Reference Model Upper Layers MAC Control (Optional) Media Access Control (MAC) Reconciliation Special code-groups XGMII MAC packet delineation Physical Coding Sublayer (PCS) MB810 coding / Physical Medium Attachment (PMA) alignment Physical Medium Dependent (PMD) MEDIUM IEEE 802.3 HSSG, November 9-10, 1999 - 5 One Polynomial Scrambler: Possible Architecture 10 Gigabit Ethernet Reference Model Upper Layers MAC Control (Optional) Media Access Control (MAC) Reconciliation Length-CRC header XGMII Mac packet delineation Physical Coding Sublayer (PCS) x48 + x28 + x27 + x + 1 Physical Medium Attachment (PMA) scrambling Physical Medium Dependent (PMD) MEDIUM IEEE 802.3 HSSG, November 9-10, 1999 - 6 Two Polynomial Scrambler: Possible Architecture 10 Gigabit Ethernet Reference Model Upper Layers MAC Control (Optional) Media Access Control (MAC) 43 Reconciliation x + 1 scrambling XGMII Length-Type-CRC header Physical Coding Sublayer (PCS) Mac packet delineation Physical Medium Attachment (PMA) Physical Medium Dependent (PMD) x7 + x6 + 1 scrambling MEDIUM IEEE 802.3 HSSG, November 9-10, 1999 - 7 Proposed Additional Objectives • Same OC-192 line frequency • Same SONET/SDH frame format • Minimum Line, Section, and Path overheads • Operates without an isochronous clock IEEE 802.3 HSSG, November 9-10, 1999 - 8 White Paper Posted to the HSSG Web Site • “Proposal for a 10 Gigabit Ethernet WAN PHY” Norival Figueira, Paul Bottorff - Nortel Networks Tom Palkert - AMCC • Proposes a 10 Gigabit Ethernet WAN PHY that supports the previous additional objectives using the two polynomial scrambler approach IEEE 802.3 HSSG, November 9-10, 1999 - 9.