Installation Guide

Table Of Contents
FEC mode is applicable for the Brocade MLXe series platforms. It will be operational on the 16Ke chassis and 32Ke chassis for the
following cards:
2x100G
24x10G
4x40G
hSFMs (FE600 based SFMs)
FEC mode is applied on a per link basis. Both sides of the link (TM side and FE side) must be in the same mode. In a Brocade MLXe
series chassis, the following applies:
All fabric facing links on the 4x40G, 2x100G and 24x10G TMs will have FEC enabled
hSFM links connected to 4x40G, 2x100 and 24x10 will have FEC enabled
Forward Error Correction on Backplane Serdes Links
The operating margin of the longer backplane traces in the Brocade MLXe series 16Ke and 32Ke chassis may be reduced due to signal
attenuation. In the normal coding scheme (8b/10b), CRC errors are detected and the corrupt packets are dropped.
The fabric is enabled in FEC mode by default on serdes links. Single-burst errors can be corrected on the fly, so packet drops are
avoided.
Forward Error Correction (FEC) on Serdes-Mode Command
The fabric is in FEC mode by default. Therefore the [no] serdes-mode command will only have the force-normal option.
The [no] serdes-mode command is for MLXe installations with FEC on backplane serdes links only.
1. Enter the [no] serdes-mode command.
device# config
device(config)# system-init fabric-serdes-mode force-normal
device# config
device(config)# no system-init fabric-serdes-mode force-normal
2. Enter the write memory command.
device# write memory
3. Enter the reload command.
device# reload
Line Module Shutdown
Line Module Shutdown is an RAS feature that improves reliability of the XMR/MLX chassis. The LP card is shutdown when both MPs
are down or MP's are disconnected from the chassis. L2 and L3 traffic is stopped, and the router stops forwarding all traffic.
Hardware flooding and dropping control traffic, required for processing by the router, is thereby avoided though the RAS feature of Line
Module Shutdown.
Product Overview
Brocade NetIron MLXe Series Hardware Installation Guide
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