Avaya 8800 Planning And Engineering, Network Design page 28

Hardware fundamentals and guidelines
Unlike the WAN 10 GbE module, the LAN version does not use SONET as its transport mechanism.
You cannot program WAN and LAN modes of operation. Due to different clock frequencies for LAN
and WAN modes of operation, the LAN and WAN versions of the 10 GbE module use different
module IDs, and are fixed in one mode of operation.
The 10 GbE modules support only full-duplex mode. In accordance with the IEEE 802.3ae standard,
autonegotiation is not supported on 10 GbE links. The following table provides details about the
differences between 1 GbE modules and 10 GbE modules.
Table 3: 1 GbE and 10 GbE module comparison
1 GbE
Carrier Sense Multiple Access with Collision
Detection (CSMA/CD) and full-duplex
802.3 Ethernet frame format (includes min/max
frame size)
Carrier extension
One physical interface
Optical or copper media
8B/10B encoding
The 8683 modules have three forwarding engine lanes and three bays for installing 10 Gigabit Small
Form Factor Pluggable (XFP) transceivers. Each lane supports 10 Gbit/s bidirectional traffic. All
three ports can run concurrently at 10 Gbit/s.
Although the 10GBASE-LR, -ER, and -ZR XFPs support both LAN and WAN modes, the 8683XLR
module supports only the LAN mode. The 8683XZR module supports both the LAN and WAN
(SONET) modes.
The 8683 modules supports the following XFPs:
• 10GBASE-SR
• 10GBASE-LR/LW
• 10GBASE-LRM
• 10GBASE-ER/EW
• 10GBASE-ZR/ZW
• 10GBASE DWDM
For more information about XFP specifications, see Avaya Ethernet Routing Switch 8800/8600
Installation — SFP, SFP+, XFP, and OADM Hardware Components (NN46205-320).
10 GbE clocking
Whether you use internal or line clocking depends on the application and configuration. Typically,
the default internal clocking is sufficient. Use line clocking on both ends of a 10 GbE WAN
connection (line-line) when using SONET/Synchronous Digital Hierarchy (SDH) Add-Drop
Multiplexing (ADM) products, such as the Optical Cross Connect DX. This allows the 10 GbE WAN
modules to synchronize to a WAN timing hierarchy, and minimizes timing slips. Interworking 10 GbE
WAN across an Add-Drop Multiplexer requires the use of an OC-192c/VC-4-64c payload cross-
connection device.
June 2016
10 GbE
Full-duplex only, no autonegotiation
802.3 Ethernet frame format (includes min/max
frame size)
Throttle MAC speed (rate adapt)
LAN and WAN physical layer interfaces
Optical media only
64B/66B encoding
Planning and Engineering — Network Design
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