Preparing for Replacement

Before you begin

For nondisruptive replacement of a core blade, ensure that the core blade in the system that you are not replacing is active and is allowing traffic through ICL ports to the same fabrics as ICL ports on the blade is replaced.

About this task

Use the following procedures to ensure that traffic will offload from the blade that you are replacing to the other core blade in the system during replacement. This ensures a nondisruptive impact on existing traffic flowing through the blade's ICLs. If ICLs are not connected to the blade or traffic over blade ICLs has been halted, skip these procedures, and then go on to Removing a Core Routing Blade.

Procedure

  1. Ensure that Lossless Dynamic Load Sharing is enabled on each logical switch that resides on each physical switch that has ICL connections through the core blades. Log on to each logical switch using an account with admin permissions, and then enter dlsShow.
    DLS is set with Lossless enabled should display if Lossless is enabled.
  2. To enable Lossless Dynamic Load Sharing, use the following options.
    You can enable this feature on individual logical switches or on each logical switch configured for the chassis.
    • Log on to each logical switch and enter the dlsset --enable -lossless command.
    • Enable Lossless on all logical switches configured in the chassis using the fosexec --fid all -cmd dlsset command.
  3. Disable each ICL port on the core blade that you are replacing using the portdecom[slot/]port command.
    This command persistently disables the port without frame loss and moves all traffic flows from the port to redundant paths between fabrics and ICL ports on the other core routing blade.
  4. Confirm that all of the ICL ports are persistently disabled (decommissioned) on the blade by logging into the physical switch and entering the portcfgpersistentdisable command.
    This command displays the status of ports in each chassis slot.
  5. Remove and replace the core blade following procedures in Removing a Core Routing Blade and Installing a Core Routing Blade.
    Note: After installing the new blade, allow sufficient time for it to initialize and for all decommissioned ports to transition back online.