7254XSQ SMLT/LACP to Cisco

[bfaltys]

Hello. I’m trying to get an LACP link to come up to a Cisco. I’ve spent too much time looking on Google without the most helpful of results so I’m hoping someone here can help. Here is some of the relevant configuration…

The interfaces on the Cisco:

interface GigabitEthernet1/1/2

switchport mode trunk

logging event trunk-status

channel-protocol lacp

channel-group 10 mode active

interface GigabitEthernet2/1/2

switchport mode trunk

logging event trunk-status

channel-protocol lacp

channel-group 10 mode active

interface Port-channel10

switchport mode trunk

On the VSP:

# LACP CONFIGURATION
#

vlacp enable
lacp smlt-sys-id d4:78:56:xx:xx:xx
lacp enable

# MLT CONFIGURATION
#

mlt 22 enable name "MY-MLT"

# MLT INTERFACE CONFIGURATION
#

interface mlt 22
smlt
lacp enable key 22
exit

interface GigabitEthernet 1/41
name "MLT22"
no shutdown
lacp key 22 aggregation enable
lacp enable
sflow sampling-rate 8192
exit

MY-SWITCH:1(config)#show mlt 22

===============================================================================
                                    Mlt Info
===============================================================================
                                         PORT    MLT        MLT           PORT         VLAN
MLTID IFINDEX NAME      TYPE   ADMIN CURRENT    MEMBERS       IDS
----------------------------------------------------------------------------------------------------
22         6165  MY-MLT     trunk   smlt        norm                                 2222

                          DESIGNATED   LACP      LACP
MLTID IFINDEX  PORTS            ADMIN     OPER
----------------------------------------------------------------------------------------------------
22       6165       null                  enable    down

                                                                                                                WHICH PORTS
                        WHERE        LOCAL                      REMOTE                   PROGRAMMED
MLTID NAME   CREATED    PORT MEMBERS      PORT MEMBERS      IN DATA PATH
----------------------------------------------------------------------------------------------------
22      MY-MLT   LOC & REM                                      NONE

                          ENCAP                                          PVLAN        VID
MLTID IFINDEX  DOT1Q     LOSSLESS   PVLAN     TYPE         TYPE       FLEX-UNI
----------------------------------------------------------------------------------------------------
22       6165       enable      disable               -              -                -            disable

A message I found in the logs:

MY-SWITCH:1(config)#show log file tail
CP1 [02/10/21 12:41:44.739:CST] 0x000ec5d1 00000000 GlobalRouter LACP INFO A churn condition has been detected for port 1/41 as the  PARTNER is out of sync.

[bfaltys · Accepted solution]

Disabled speed negotiation on the Cisco interface and the link came up.

[bfaltys]

VSP & Cisco do link when I use copper SFP on the VSP to copper port on Cisco.

[bfaltys]

Additionally, the Cisco will link right up with a 4926 so it feels like there is something going on with the 7200...

[bfaltys]

Well, I’ve got access to the Cisco side. These devices won’t even link up. I have a Linkrunner & it links to each device using the same LC/LC cable & the same SFPs, but the devices won’t link with each other. I even have a fresh vsp & Cisco 2960-x that I’m testing on & they just don’t want to link. No STP. No shutdown ports. No err-disabled ports. Crazy!