topic Re: X670 Switching MLAG with more than 2 members in ExtremeSwitching (EXOS/Switch Engine)

X670 Switching MLAG with more than 2 members

Humza — Fri, 15 May 2020 02:00:44 GMT

Hi, hope you’re all well.

I currently have an MLAG configuration in a standard setup on a pair of X670 switches, that is 1x 10G member in each switch. We now have a requirement for some additional bandwidth on the same bond, and I am having trouble finding a method to do this without disabling MLAG, which will cause some issues.

My colleagues recall this was possible previously but can’t recall commands.

So far I’ve tried:

# enable sharing 42 grouping 42,44 algorithm address-based lacp 
Error: Sharing configuration on MLAG ports 42 cannot be modified. 
Use "disable mlag port" to remove port from MLAG first

# configure sharing 42 add ports 42,44 
Error: Sharing configuration on MLAG ports 42 cannot be modified. 
Use "disable mlag port" to remove port from MLAG first

# configure sharing 42 add ports 44
Error: Sharing configuration on MLAG ports 42 cannot be modified. 
Use "disable mlag port" to remove port from MLAG first

Is anyone able to advise how I’d be able to go about doing this?

Regards

Re: X670 Switching MLAG with more than 2 members

markus_of — Fri, 15 May 2020 14:05:48 GMT

Hello Humza,

could you post your current sharing and mlag config here?

Re: X670 Switching MLAG with more than 2 members

Humza — Fri, 15 May 2020 19:52:10 GMT

enable sharing 42 grouping 42 algorithm address-based L2 lacp
configure sharing 42 lacp timeout short

create mlag peer "sw-02" 
configure mlag peer "sw-02" ipaddress 172.16.0.2 vr VR-Default 
enable mlag port 42 peer "sw-02" id 42

It’s a fairly basic configuration, and has been taken from https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-MLAG-in-Extreme-switches.

It is working fine with 1 LAG member link in sw-01 and 1 LAG member in sw-02.

We would like to have 2 LAG members in sw-01 and 2 LAG members in sw-02 for example.

Re: X670 Switching MLAG with more than 2 members

markus_of — Fri, 15 May 2020 20:12:11 GMT

okay difficult!

honestly i see no way to do that without breaking up mlag.

but it shouldn't be a problem to delete the mlag ... then add a port for sharing and rebuild the mlag

mlag would only be important if you restarted a switch.

Re: X670 Switching MLAG with more than 2 members

PeterK — Fri, 15 May 2020 21:36:36 GMT

I would recommend to do following:

mlag-peer 1:

disable port 42

disable mlag port 42…

configure sharing 42 add ports 44

enable mlag port 42…

enable ports 42,44

this should have no big interrupt, because you have already the second mlag side up…

After that you can do same on the other mlag-peer.

What are you thinking, what can cause issues?