Ethernet Switching
Ethernet Switching

MC-LAG issue. Active - Standby. 2 MXes and 1 EX.

[ Edited ]
‎05-28-2019 02:37 AM

Hello,

 

MX960 (dcr3.hors) xe-0/1/1 (ae100) <===> (ae0) xe-0/1/0 (dcx-test.hors) EX2300

MX960 (dcr4.hors) xe-0/1/1 (ae100) <===> (ae0) xe-0/1/1 (dcx-test.hors) EX2300

 

I have an MC-LAG issue which is manifesting this way:

root@dcx-test.hors> show lacp interfaces ae0 extensive
Aggregated interface: ae0
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
xe-0/1/1 Actor No Yes No No No Yes Fast Active
xe-0/1/1 Partner No Yes No No No Yes Fast Passive
xe-0/1/0 Actor No Yes No No No Yes Fast Active
xe-0/1/0 Partner No Yes No No No Yes Fast Passive
LACP protocol: Receive State Transmit State Mux State
xe-0/1/1 Defaulted Fast periodic Detached
xe-0/1/0 Defaulted Fast periodic Detached
LACP info: Role System System Port Port Port
priority identifier priority number key

xe-0/1/1 Actor 127 b8:c2:53:0e:95:46 127 2 1
xe-0/1/1 Partner 1 00:00:00:00:00:00 1 2 1
xe-0/1/0 Actor 127 b8:c2:53:0e:95:46 127 1 1
xe-0/1/0 Partner 1 00:00:00:00:00:00 1 1 1

 

trf@dcr3.hors> show lacp interfaces ae100 extensive
Aggregated interface: ae100
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
xe-0/1/1 Actor No No No No Yes Yes Fast Active
xe-0/1/1 Partner No Yes No No No Yes Fast Active
LACP protocol: Receive State Transmit State Mux State
xe-0/1/1 Current Fast periodic Attached
LACP info: Role System System Port Port Port
priority identifier priority number key
xe-0/1/1 Actor 127 00:00:00:00:00:01 200 18 100
xe-0/1/1 Partner 127 b8:c2:53:0e:95:46 127 1 1

 

trf@dcr4.hors> show lacp interfaces ae100 extensive
Aggregated interface: ae100
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
xe-0/1/1 Actor No No No No No Yes Fast Active
xe-0/1/1 Partner No Yes No No No Yes Fast Active
LACP protocol: Receive State Transmit State Mux State
xe-0/1/1 Current Fast periodic Waiting
LACP info: Role System System Port Port Port
priority identifier priority number key
xe-0/1/1 Actor 127 00:00:00:00:00:01 100 32788 100
xe-0/1/1 Partner 127 b8:c2:53:0e:95:46 127 2 1

 

trf@dcr3.hors# run show interfaces mc-ae
Member Link : ae100
Current State Machine's State: mcae active state
Local Status : active !!!!
Local State : down <<<should be up>>>
Peer Status : standby !!!!
Peer State : down <<<should be up>>>


trf@dcr4.hors# run show interfaces mc-ae
Member Link : ae100
Current State Machine's State: mcae standby state
Local Status : standby !!!!
Local State : down <<<should be up>>>
Peer Status : active !!!!
Peer State : down <<<should be up>>>.

 

ICCP is UAR.

Tested the config in a LAB, all works great.

Where do i start to troublesoot ??

 

4 REPLIES 4
Ethernet Switching

Re: MC-LAG issue. Active - Standby. 2 MXes and 1 EX.

‎05-28-2019 06:24 AM

Is chassis aggregated-devices ethernet device-count set to >=101 on the MX's? You should post relevent configs for each of the three devices.

Ethernet Switching

Re: MC-LAG issue. Active - Standby. 2 MXes and 1 EX.

‎05-28-2019 11:24 AM

LACP is down on all 3 devices

 

labroot@lab# run show lacp interfaces
Aggregated interface: ae6
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
xe-0/0/1 Actor No No Yes Yes Yes Yes Fast Active
xe-0/0/1 Partner No No Yes Yes Yes Yes Fast Active
LACP protocol: Receive State Transmit State Mux State
xe-0/0/1 Current Fast periodic Collecting distributing <<<<<<This is what is looks like when LACP is up 

 

First of all, you should check if LACP can come back between one MX and one EX. Looks like in your case, you are not able to bring up the LACP even with one MX and on EX. After that, we can check ICCP/ICL and mc-ae. Please get ae100/ae0/iccp and other related configurations 


Mengzhe Hu
JNCIE x 3 (SP DC ENT)
Ethernet Switching

Re: MC-LAG issue. Active - Standby. 2 MXes and 1 EX.

‎05-28-2019 01:55 PM

Hi there,

 

agree with the last comments you need to ensure you are not just running into a LACP issue, and with the config you showed us is hard to tell.

 

Check that first then you can use these commands should work on MX

 

root@re0# set multi-chassis mc-lag consistency-check   

after that run the consistency check:

 

 root@re0>run show multi-chassis mc-lag configuration-consistency

hope it helps let us know ok

 

 

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Ethernet Switching
Solution
Accepted by topic author rocketfkinscience
‎05-29-2019 03:51 AM

Re: MC-LAG issue. Active - Standby. 2 MXes and 1 EX.

‎05-29-2019 03:51 AM

Hello,

 

The issue is comming from MX interfaces, i used another interfaces and everything came up.

Thanks for help.