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--- networking:small_form_factor_pluggable_sfp_p [2024/06/17 16:27] – aperez
+++ networking:small_form_factor_pluggable_sfp_p [2025/02/24 09:37] (current) – aperez
@@ Line 7: / Line 7: @@
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+[[networking:fiber_optics|]]
+[[networking:optical_fiber_fundamentals_fibers|networking:optical_fiber_fundamentals_fibers]]
+----
+----
 {{ :networking:sfp1.jpg?500 |}}
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   approved along with some 200G not listed here. Remember our quote (above) from Bob Metcalfe, co inventor of
   Ethernet:  "The wonderful thing about standards is we have so many to choose from."
+----
+----
+**Addressing the New Paradigm**
+**IEEE 802.3df™-2024**, **with its parallel x8 structure for 800 GbE**, enables Ethernet to address the reality of today’s networks where dual 400 GbE links are already being supported in a single x8 copper or optical connection. While this helped enable higher 400 GbE port density, it has emerged into even greater flexibility for configuring a port. Consider a given eight-lane port: it could be configured to support any of the following scenarios: a) one eight-lane implementation; b) two four-lane implementations; c) four two-lane implementations; d) eight one-lane implementations.
+Thus, in combination with the standards noted in Table 1, a network architect can configure a single port to support standardized 100 GbE, 200 GbE, 400 GbE, or 800 GbE. This enables leveraging economies of scale to drive costs down throughout the entire ecosystem.
+{{ :networking:sfp21.jpg?500 |}}
+**Looking Ahead**
+As previously highlighted from the latest IEEE 802.3™ Ethernet bandwidth assessment, by 2025 traffic levels are forecasted to be 2.3x to 55.4x the observed levels of 2017. While it is anticipated that IEEE 802.3df™-2024 will provide relief to a number of applications, the continuing exponential growth of industry bandwidth needs will necessitate the next rate of Ethernet sooner than the historical approximate 7 years that has been observed since 10 GbE.
+The IEEE P802.3dj 200 Gb/s, 400 Gb/s, 800 Gb/s, and 1.6 Tb/s Ethernet Task Force emerged out of the IEEE P802.3df™ Task Force. The focus of this force will be on developing solutions based on 200 Gb/s or greater electrical and optical signaling. Those familiar with Ethernet are familiar with its propensity to provide upgrade paths. Therefore, the IEEE P802.3dj™ Task Force will be focused on solutions based on 1, 2, 4, and 8 lanes. As illustrated in Figure 3, with a lane rate of 200 Gb/s, solutions for 20 GbE, 400 GbE, 800 GbE, and the next Ethernet rate, 1.6 Tb/s, will be developed. This project is currently scheduled for completion in 2026.
+{{ :networking:sfp22.jpg?500 |}}
+----
+----
+**FEC** on an SFP port refers to **Forward Error Correction (FEC)**, which is a technique used in fiber optic and Ethernet networks to enhance data transmission reliability by detecting and correcting errors without the need for retransmission.
+**FEC (Forward Error Correction)**:
+FEC is a mechanism that adds redundant information to the transmitted data. This redundancy allows the receiving end to detect and correct errors caused by signal degradation or noise during transmission.
+Purpose: FEC is essential for high-speed data links (e.g., 10G, 25G, 40G, 100G Ethernet) to improve link quality and performance.
+Types: Different FEC modes can be used depending on the standard and speed of the connection (e.g., Reed-Solomon FEC).
+  *   **auto**   Enable FEC Auto-Neg
+  *   **cl108**  Enable clause108 with 25G
+  *   **cl74**   Enable clause74 with 25G
+  *   **off**    Turn FEC off, FEC is mandatory for speeds 50G or higher
+----
+----
+**Benefits of FEC on SFP Ports**:
+  * Error Correction: FEC can correct errors due to signal attenuation or interference.
+  * Better Link Performance: Allows for longer cable runs or higher speeds by improving signal integrity.
+  * No Retransmissions: Unlike other error correction methods, FEC works proactively without needing retransmissions, which is important for low-latency environments.
+----
+----
+**Aruba Switch 6400:**
+  CS-2P-MDFHA-A#** show ver**
+  -----------------------------------------------------------------------------
+  ArubaOS-CX
+  (c) Copyright 2017-2024 Hewlett Packard Enterprise Development LP
+  -----------------------------------------------------------------------------
+  Version      : FL.10.13.1010
+  Build Date   : 2024-04-09 00:34:12 UTC
+  Build ID     : ArubaOS-CX:FL.10.13.1010:ef2109377880:202404090010
+  Build SHA    : ef21093778805e954ec130b0939d34927bb7ba19
+  Hot Patches  :
+  Active Image : primary
+  Service OS Version : FL.01.14.0002
+  BIOS Version       : FL.01.0002
+CS-2P-MDFHA-A(config)# **interface 1/3/36**
+**error-control**    Configure the error control (**FEC**) mode
+  CS-2P-MDFHA-A(config-if)# error-control
+    auto        Use the transceiver default
+    base-r-fec  Use IEEE BASE-R (Firecode) FEC
+    none        Do not use any FEC
+    rs-fec      Use IEEE Reed-Solomon FEC
+----
+**C9500 Cisco Catalyst**
+C9500-N#**show ver**
+  Cisco IOS XE Software, **Version 17.12.03**
+  Cisco IOS Software [Dublin], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.12.3, RELEASE SOFTWARE (fc7)
+  interface TwentyFiveGigE1/0/3
+   description VLAN 526 PTP A.B.C.D/EF X30
+   switchport access vlan 526
+   switchport mode access
+   mtu 9100
+   logging event trunk-status
+   logging event bundle-status
+   udld port aggressive
+   fec cl74
+  C9500-N(config-if)#interface TwentyFiveGigE1/0/3
+  C9500-N(config-if)#fec ?
+    auto   Enable FEC Auto-Neg
+    cl108  Enable clause108 with 25G
+    cl74   Enable clause74 with 25G
+    off    Turn FEC off, FEC is mandatory for speeds 50G or higher
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