02-10-2021 07:09 PM
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.
Solved! Go to Solution.
03-05-2021 07:27 PM
Disabled speed negotiation on the Cisco interface and the link came up.
03-05-2021 07:27 PM
Disabled speed negotiation on the Cisco interface and the link came up.
03-05-2021 07:10 PM
VSP & Cisco do link when I use copper SFP on the VSP to copper port on Cisco.
03-05-2021 06:46 PM
Additionally, the Cisco will link right up with a 4926 so it feels like there is something going on with the 7200...
03-05-2021 06:15 PM
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!