topic LAG two ports 1:1 4:1 in ExtremeSwitching (EXOS/Switch Engine)

LAG two ports 1:1 4:1

Peternoclue — Thu, 05 Nov 2020 22:30:59 GMT

Re: LAG two ports 1:1 4:1

CThompsonEXOS — Thu, 05 Nov 2020 22:33:19 GMT

Hi,

Is the concern here that links are flapping that are part of LAG?

Is this LAG using LACP?

If so can you provide the output of “show lacp counters”?

Thanks,

Chris Thompson

Re: LAG two ports 1:1 4:1

BradP — Thu, 05 Nov 2020 22:36:09 GMT

Hello Peternoclue:

Please check out the following commmand

enable sharing port grouping port_list {algorithm [address-based {L2 | L3 | L3_L4 | custom} | port-based }]} {resilient-hashing [on | off]}

Thanks

Brad

Re: LAG two ports 1:1 4:1

Peternoclue — Thu, 05 Nov 2020 23:01:16 GMT

I Will try with LACP

Before I was using a Cisco 3570 Trunking port on 1 & 2 to the both core switches port 20

enable sharing 1:1 grouping 1:1 - 4:1 algorithm port-based lacp

Re: LAG two ports 1:1 4:1

BradP — Thu, 05 Nov 2020 23:02:36 GMT

Hi Peternoclue,

I think the issue is that you used “1:1-4:1”, which includes many many ports. Please adjust to “1:1,4:1” and see if that works better for you.

Thanks

Brad

Re: LAG two ports 1:1 4:1

CThompsonEXOS — Thu, 05 Nov 2020 23:03:32 GMT

Hi,

If you are using LACP you want to see the Y flags( under Agg Mbr) and A(under link state) like below:

ExtremeCore.1 # show sharing
Load Sharing Monitor
Config    Current Agg     Min    Ld Share        Ld Share  Agg Link  Link Up
Master    Master  Control Active Algorithm Flags Group     Mbr State Transitions
================================================================================
    11            LACP       1    L2        A     11        Y     A       0
                                  L2              12        Y     A       0
==============================================================================

Thanks,

Chris Thompson

Re: LAG two ports 1:1 4:1

Peternoclue — Thu, 05 Nov 2020 23:25:41 GMT

sorry i did use 1:1,4:1 Thanks

Re: LAG two ports 1:1 4:1

BradP — Thu, 05 Nov 2020 23:45:18 GMT

OK cool. So now we need to establish if both sides are using LACP. Please follow Chris’ suggestion regarding LACP counters and the output of the “show sharing” command to see what’s happening.

Thanks

Brad

Re: LAG two ports 1:1 4:1

Miguel-Angel_RO — Thu, 05 Nov 2020 23:46:11 GMT

Peternoclue,

Could you give the config on the cisco concerning those ports?

It should be something like this:

interface Ethernet1/27 description switch-ebu switchport mode trunk switchport trunk native vlan 2 speed 1000 channel-group 17 mode active

Mig