Tag Archives: BES-54238

Migrating from the CN1610 to the BES-53248 for cluster interconnect

In my continuing effort to make the adoption of the BES-53248 more streamlined, I figured I would also write a migration guide as I personally had to read the documentation more than once to understand it completely. If you haven’t already checked it out, it might be helpful to first consult my first timers’ guide as the following guide starts with the assumption that your new switches are racked and Inter-Switch Links (ISL) connected and initial configuration has been performed.

Another quick caveat, this is by no means a replacement for the official documentation and the methods below may or may not be supported by NetApp. If you want the official procedure, that is documented here.

Now that we’ve got the above out of the way, I’ll get down to brass tacks. To keep things simple, we’re going to start with a simple two-node switched cluster which should look like this:

You should also have your new BES switched setup as so:

Next step, lets make sure we don’t get a bunch of cases created by kicking off a pre-emptive auto support:

system node autosupport invoke -node * -type all -message MAINT=2h

Elevate your privilege level and confirm all cluster LIFs are set to auto-revert:

set advanced
network interface show -vserver Cluster -fields auto-revert

If everything above looks good, it’s time to login to your second BES which NetApp wants you to name cs2 and configure a temporary ISL back to your first CN1610. Personally I feel the temporary ISL is optional, but can provide a bit of added insurance to your change:

(cs2) # configure
(cs2) (Config)# port-channel name 1/2 temp-isl
(cs2) (Config)# interface 0/13-0/16
(cs2) (Interface 0/13-0/16)# no spanning-tree edgeport
(cs2) (Interface 0/13-0/16)# addport 1/2
(cs2) (Interface 0/13-0/16)# exit
(cs2) (Config)# interface lag 2
(cs2) (Interface lag 2)# mtu 9216
(cs2) (Interface lag 2)# port-channel load-balance 7
(cs2) (Config)# exit

(cs2) # show port-channel 1/2
Local Interface................................ 1/2
Channel Name................................... temp-isl
Link State..................................... Down
Admin Mode..................................... Enabled
Type........................................... Static
Port-channel Min-links......................... 1
Load Balance Option............................ 7
(Enhanced hashing mode)

Mbr     Device/        Port      Port
Ports   Timeout        Speed     Active
------- -------------- --------- -------
0/13    actor/long     10G Full  False        
0/14    actor/long     10G Full  False 
0/15    actor/long     10G Full  False
0/16    actor/long     10G Full  False

At this point, we’re going to disconnect any of the connections to the second CN1610 and run these to the second BES-53248. You may need different cables to ensure they are supported, check Hardware Universe. When you’re done this recabling step, it should look like this:

Note: It’s this step here that made me realize the temporary ISL is optional since we now have our two sets of LIFs isolated from each other.

Next, let’s put the (optional) temporary ISL into play. At your first CN1610, disconnect the cables connected to ports 13-16 and once they’re all disconnected, assuming these cables are supported by both switches, plug them into ports 13-16 on your second BES, so it looks like this:

Now on the second BES-53248, verify the ISL is up:

show port-channel

Assuming the port-channel is up and running, let’s check the health of our cluster LIFs by issuing the following commands at the cluster command line:

network interface show -vserver Cluster -is-home false
network port show -ipspace Cluster

The first command shouldn’t produce any output, give the LIFs time to revert however. The second command, you want to make sure all ports are up and healthy. Once all the LIFs have reverted home, you can now move all the links from the first cluster node as well as removing the temporary ISLs so you end up with this:

Run the same two commands as before:

network interface show -vserver Cluster -is-home false
network port show -ipspace Cluster

Provide everything looks good, you’re free to remove the CN1610s from the rack as they are no longer in use. The final step is to clean up the configuration on your second BES-53248 by tearing down the temporary ISL configuration, done like this:

(cs2) # configure
(cs2) (Config)# deleteport 1/2 all
(cs2) (Config)# exit
(cs2) # write memory

This guide is by no means a replace for the official documentations but rather a companion to it. You should always consult the official documentation, I purposely cut out some of the steps I felt gave the docs a bit of a TL;DR feel but it doesn’t mean I wouldn’t personally run those steps if I were doing the work. This document is only my attempt to clarify the official docs, hopefully it does so for you.

The BES-53248 first-timer’s guide

With the CN-1610 starting to get long in the tooth and with more platforms supporting and/or requiring a cluster interconnect network greater than 10Gbit, the need to introduce a non-Cisco option came to be. This option is the BES-53248, which is a “Broadcom Supported” switch produced by Quanta, makers of all things hyper scale who sells it as the QuantaMesh T4048-IX8. At some point Broadcom’s EFOS is installed on the T4048-IX8 via the Open Network Install Environment (ONIE) and it becomes the product we know as the BES-53248. While definitely a superior switch, supporting 10/25/40/100Gbit, the deployment thereof is not as streamlined, hence this post.

I struggled a bit with how to approach this topic and settled up the following: I will provide a numbered list of steps as a guide and index but then have sections below that expand upon those steps. There could very well be times where you want to perform these steps in a different order but if this is your first time working on this switch and it’s factory-fresh, the steps below are how I would advise proceeding.

  1. Equipment Ordering, including licences
  2. Broadcom Support Account, Firmware Download
  3. Reference Configuration Files (RCF)
  4. Supporting Infrastructure
  5. Initial Configuration

Equipment Ordering, including licences

The BES-53248 has 48 × 10/25Gbit ports and 8 × 40/100Gbit ports; by default the first 16 × 10/25Gbit ports are available for cluster interconnect connections and the last 2 × 40/100Gbit are reserved for Inter-Switch Links (ISL); which is already an improvement over the CN1610’s 12 × ClusterNet ports. If the environment requires more ports than this, the 10/25Gbit ports can be licensed in blocks of 8 (Part # SW-BES-53248A2-8P-1025G) all the way up to 48, and there is one license (Part # SW-BES-53248A2-6P-40-100G) to activate the remaining 6 × 40/100Gbit ports. Be sure your order also has all the requisite transceivers and cables, consult HWU for specific compatibilities. Lastly, the BES-53248 doesn’t ship with rails by default, so make sure your quote shows them if you need them.

When your switches arrive they will include a manilla envelope with licensing information if licenses above the base configuration were ordered, do not recycle this envelope as it contains the very important Transaction Key which you will use to generate your license file at this site:


Before visiting that link, along with your license keys you’ll need the switch serial numbers which are located on the switches themselves like so:

The license file generation procedure is instant, so not having this ahead of time isn’t that big of a deal provided you have internet access while at the installation site.

Broadcom Support Account, Firmware Download

What isn’t instantaneous however is the creation of a TechData-provided, Broadcom Support Account (BSA), and you need this account do download firmware for the switches. In order to setup a BSA, which hopefully you did a couple of days in advance of requiring the firmware, you need to send an email to: support@techdata.com with the following information:

Indicate if OEM (Netapp/Lenovo), Partner/Installer or Customer:
Name of Company device is registered to (if partner/installer):
Requester Name:
Requester Email Address:
Requester Phone Number:
Address where device is located:
Device Model Number: BES-53248
Device Serial Number:

I’ve found the folks that respond to this email address are pretty easy to deal with, though I’m not sure you’ll be able to get your account if you don’t already have the serial number, comment below if you know. My account creation took roughly 24 hours and then I had access to the firmware downloads. Download the appropriate firmware for your environment. The switches I received in August of 2021 shipped with EFOS which was supported in the environment I was deploying into, but so was so that’s where I wanted to land.

Reference Configuration Files (RCF)

Download the appropriate RCF for the environment and edit accordingly. If you visit HWU and drill down into the switch category, you can download the RCF from there:

I was converting an AFF8080 from two-node switchless to switched and adding an A400 at 100Gbit. I grabbed RCF 1.7 from Hardware Universe (not where I’d expect to find it but nice and easy) and uncommented ports 0/49-0/54 by removing the initial exclamation point on the lines in question since the additional 40-100 license activates all of these ports, I deleted the lines setting the speed to 40G full-duplex. I hope in version 1.8 of the RCF, this configuration will also be applied as a range since that’s the only license option available for purchase on these ports.

Supporting Infrastructure

In your site requirements checklist, ensure the availability of an http (or ftp, tftp, sftp, scp) server on the management network. Once the equipment is racked and the management interface cabled, you will need this server to host your EFOS firmware, license files and RCF.

Initial Configuration

The first time you connect to the device, most likely via serial, assuming the unit was factory-fresh like mine, the username should be admin and the password should be blank. You will be immediately forced to change the password. I noticed that when I was going through this, copying, and pasting the new password didn’t work for me but typing the same password did; this may have had something to do with the special characters chosen or the app I was using (serial.app on macOS). Another thing to be aware of, if you’re applying RCF 1.7 you will have to be on EFOS first. The switches I based this post on shipped with and there are some commands in the RCF that aren’t compatible, so you’ll want to upgrade EFOS before applying RCF 1.7. Also, applying an RCF means wiping any existing configuration first, so you might as well get this out of the way while you are on site.

Once you’ve changed the password, it’s time to configure the management IP address so you can retrieve the license files, EFOS image and RCF from the http server mentioned previously. You’ll need to be logged in, and have elevated your privilege level to enable:

(CLswitch-01) >enable

(CLswitch-01) #serviceport ip

(CLswitch-01) #show serviceport

Interface Status............................... Up
IP Address.....................................
Subnet Mask....................................
Default Gateway................................
IPv6 Administrative Mode....................... Enabled
IPv6 Prefix is ................................ fe80::c218:50ff:fe0b:24c5/64
Configured IPv4 Protocol....................... None
Configured IPv6 Protocol....................... None
IPv6 AutoConfig Mode........................... Disabled
Burned In MAC Address.......................... B4:A9:FC:34:8F:CE

(CLswitch-01) #ping
 Pinging with 0 bytes of data:

Reply From icmp_seq = 0. time= 2 msec.
Reply From icmp_seq = 1. time <1 msec.
Reply From icmp_seq = 2. time= 26 msec.

Now that you are on the network, the first thing we should do is add any additional licenses. Here are the commands with an explanation of what they do:

show license

show port all | exclude Detach 

copy nvram:license-key 1 


show license

show port all | exclude Detach 
See how many licenses are currently applied, if any.

Display currently licensed ports.

Copies the file from the http server and places it in index 1

reboots the switch

This is after you’ve re-logged in, it should show you something different than the last time you ran this.

This should show additional ports than from before adding the license.

Once you have added your license file(s), it’s time to upgrade EFOS, here are the commands with an explanation of what they do:

show bootvar

copy active backup

show bootvar

show version

copy active 

show bootvar


show version
Shows the images: active, backup, current-active and next-active.

Copies the active image to the backup slot, just in case.

Verify that the above worked.

Shows the version actually running.

Copies the image on the web server to the active slot.

Verify the last command.

Reboot the switch.

Verify the upgrade worked.

Now that we have upgraded our EFOS image, it’s time to apply the RCF. There really is no point in doing any additional configuration until we’ve done this since we have to destroy our configuration before applying the RCF anyway. Be sure that you’re only applying the default RCF if you haven’t added any licenses. If you have added licences, you need to uncomment the lines that configure the additionally licensed ports. Here are the commands with an explanation:

erase startup-config

copy nvram:script BES-53248_RCF_v1.7-Cluster-HA.scr 

script list

script apply BES-53248_RCF_v1.7-Cluster-HA.scr 

show running-config

write memory


This clears the startup configuration, overlaying an RCF-sourced configuration can have negative consequences.

This copies the txt file from the web server to NVRAM as a script and renames it in the process.

gives you a directory listing of available scripts to confirm the above transfer worked

applies the contents of the RCF to the configuration

displays the new running configuration to verify successful application of RCF

commit new configuration to non-volatile memory

reboots the switch so this new configuration can take affect

There, you’re all done, now you can proceed with the official guide on (re)configuring the management IP address, ssh and so on. Good luck, and if you have an experience that strays from the above, please let me know so I can update the post.