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Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-24-2019 01:37 AM

Hello,

There is a issue between Juniper and Cisco regarding lacp and portchannel.

Working configuration on Juniper and Cisco Nexus5K, bellow is a working configuration:
Model: mx960  System version: 5.2(1)N1(1)
JUNOS Base OS boot [12.3R6.6]  
   
  interface port-channel55
set interfaces ae55 description type=core,subtype=isc,int=houir3.ge-1/1/1   description type=core,subtype=isc,peer=houir3,peerint=ge-1/1/1,peeragg=ae55
set interfaces ae55 traps   switchport mode trunk
set interfaces ae55 vlan-tagging   spanning-tree port type edge trunk
set interfaces ae55 mtu 2000   speed 1000
set interfaces ae55 encapsulation flexible-ethernet-services  
set interfaces ae55 aggregated-ether-options lacp active  
set interfaces ae55 aggregated-ether-options lacp periodic fast interface Ethernet1/5
    description type=core,subtype=isc,peer=houir3,peerint=ge-1/1/1,peeragg=ae55
set interfaces ge-1/1/1 description type=core,subtype=isc,peer=houobgis2,peerint=Eth1/5,int=ae55   switchport mode trunk
set interfaces ge-1/1/1 gigether-options no-auto-negotiation   speed 1000

set interfaces ge-1/1/1 gigether-options 802.3ad ae55

 

  channel-group 55 mode active

 

After replicating the same config on another  Juniper MX960 Junos 14.2R6.5 using a different ae -> ae91 connection wont come up:

ae91            up    down type=core,subtype=isc,int=houir5.ge-11/0/5,peerint=po55
port-channel55 is down (No operational members)

 

Connection is working without using portchannel and LACP.

 

Can someone help with that ?

5 REPLIES 5
Ethernet Switching

Re: Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-24-2019 01:53 AM

Did you configure ae interface count to 92 as you are using ae91?

set chassis aggregated-devices ethernet device-count 92

 

Please share output of below mentioned commands:

 

show lacp interfaces

show lacp statistics interfaces

 

 

Thanks,
Nellikka
JNCIE x3 (SEC #321; SP #2839; ENT #790)
Please Mark My Solution Accepted if it Helped, Kudos are Appreciated too!!!
Ethernet Switching

Re: Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-24-2019 02:32 AM

Hello,

 

I will upload the outputs shortly.

meanwhile when interogating the interface it appear as "active" does it mean that the command was allready entered ?

saurabh.singh@houir5> show interfaces terse | match ae91 | refresh 2      
---(refreshed at 2019-05-19 03:47:10 UTC)---
ge-11/0/5.32767         up    up   aenet    --> ae91.32767
ae91                    up    down
ae91.32767              up    down multiservice
---(refreshed at 2019-05-19 03:47:15 UTC)---
 ge-11/0/5.32767         up    up   aenet    --> ae91.32767
ae91                    up    down
ae91.32767              up    down multiservice
Ethernet Switching

Re: Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-24-2019 05:51 PM

This might be a LACP issue, you can try doing :

 

show interfaces ae92 extensive     >>>> we need to check if the system ID is seeing with the nexus device.

 

show lacp interface ae92

 

show lacp statistics interfaces ae92               >>>>>>>> we need to check if we are sending or receiving LACPDUs.

 

Try removing LACP and see if the AE92 comes up, then try ping connectivity and check if that works, if so, this might be an LACP issue between Juniper and Nexus.

 

Also, I’m curious about your AE92 configuration, can you associate a vlan-id to the AE92 ?

 

Please mark my solution as accepted if it helped, Kudos are appreciated as well.  Smiley Happy

Ethernet Switching

Re: Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-25-2019 11:00 AM

Hi,

 

Do you have LACP enabled at Nexus ?

 

//Regards

AD

 

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Ethernet Switching

Re: Juniper MX960 LACP - Cisco Nexus 5k portchannel not working

‎05-27-2019 12:34 AM

Hello, i requested from the customer the above information.

I will paste it here ASAP.