topic Re: SMLT on VSP7024XLS in ExtremeSwitching (ERS)

SMLT on VSP7024XLS

MWH — Sun, 12 Nov 2023 10:02:12 GMT

Hello,

I have two VSP7024XLS configured as IST. I'm trying to configure SMLT to distribute some servers (NIC Teaming) between the two, but it's not accepting the configuration no matter what.

- I assigned SMLT ID to a port (Access).

- I added the port to MLT-2

When I try to set SMLT ID and the type to SMLT, an error pops saying MLT-2 is disabled, and when i try to enable it, it says Port# is configured as SLT.

What am I missing?

thanks,

Re: SMLT on VSP7024XLS

EXTR_Paul — Tue, 14 Nov 2023 14:47:05 GMT

The VSP7024, which are really BOSS/ERS devices have been end of support for a while. So its been a while, my memory is fuzzy.

The older ERS/BOSS switches had a concept of SLT (Single Link Trunk). Or you can use the normal SMLT.

SLT should only be used if you know your link will only ever be one port per switch. SMLT are more commonly used, which is why SLT's have been deprecated from future VSP platforms.

I would recommend using SMLTs. In which case you need to assign the port to the MLT first. Then enable the MLT to a SMLT.

I would go into the switch and delete the SLT config from the port. Then configure an SMLT.

here is an example.

configure terminal
mlt 6
mlt 6 member 1/18
interface mlt 6
smlt
exit

This config would need to be on both switches.

There are some old VSP7000 config examples in this guide.

https://documentation.extremenetworks.com/TCG-TSG/SPBVOSS_TCG_CG.pdf

Out of curiosity. Are you running the VSP7024s in SPBm mode. Or just normal L2 / L3 mode?

Re: SMLT on VSP7024XLS

MWH — Wed, 15 Nov 2023 10:23:55 GMT

Hi Paul,

Thank you very much for your reply.

First, the answer to your question is I'm using it for just normal L2/L3 operations.

As with the issue I'm having, the switch doesn't accept assigning a single port to an MLT, it doesn't allow me to enable the MLT either if I don't assign 2+ ports to an MLT. and even when I configured SMLT on a port, if i try to enable MLT it will reject saying that the port is part of SLT. in short, I'm denied whichever combination I try.

% Cannot modify settings
% Trunk must have at least 2 members.

This is leading me to believe that this model will only act as a MLT edge switch and that I must stack it if I want to use the ports of the units for MLT/SMLT scenarios. but I'm still not 100% convinced because why then are the SMLT options available?

Mind you that this issue is with the setup between the VSPs and the servers. I still have to link them to two vIST/SPBM VSP4450GSX switches that may bring up the same issue as I was planning to use SMLT-SMLT setup. The difference is that VOSS SMLT configuration is more flexible (your configuration example is actually for VOSS).

I know it's a EOL product, but it's one of them times when you got to use what you have. so, I'm open to more suggestions if you still got any 🙂

Re: SMLT on VSP7024XLS

EXTR_Paul — Wed, 15 Nov 2023 20:36:07 GMT

What version of code is running on the VSP7024? And are you sure the IST is up?

usually when you get a "Cannot Modify Settings" because their is an existing setting. Make sure all your MLT, SLT and port assignments are 100% deleted.

Also, it appears that the manuals are no longer posted on our website. But I found a code snip from an old project.

Below is what the IST, MLT/SMLT and SLT config.

does that match what you have?

mlt 1 enable member 1/1,2/1
mlt 32 member 1/24

interface mlt 1
ist peer-ip X>X>X>X
ist vlan Y>Y>Y>Y
ist enable
exit

interface mlt 32
smlt 32
exit

interface Ethernet ALL
smlt port 1/2 12
smlt port 1/3 13
smlt port 1/4 14
smlt port 1/5 15