Ethernet Switching
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Ethernet Switching

LACP to pass through MX204

‎10-03-2019 12:49 AM

Hello,

 

I am facing issue about getting LACP message to pass through MX204. Below is the topology:

 

QFX5110------------MX204------------QFX5110

 

I have Juniper MX204 as PE router with MPLS enabled. I have a requirement which needs to configure LACP between QFX switches by passing through MX204. So, I am writing for idea/solution to make that happen.

 

Appreciate for any input.

Seyma
JNCIP-ENT, SEC, SP
3 REPLIES 3
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Ethernet Switching

Re: LACP to pass through MX204

‎10-03-2019 02:10 AM

Hello,

 

This is possible with interface cross-connect. Taking Your diagram and adding interface numbers for example:

 

 


@Seyma wrote:

 

QFX5110------------xe-0/0/0--MX204--xe-0/0/1-------------QFX5110

 

 


The JUNOS CLI code would be:

 

set interfaces xe-0/0/0 encapsulation ethernet-ccc
set interfaces xe-0/0/0.0 family ccc
set interfaces xe-0/0/1 encapsulation ethernet-ccc
set interfaces xe-0/0/1.0 family ccc
set protocols connections interface-switch XCON-1 interface xe-0/0/0.0
set protocols connections interface-switch XCON-1 interface xe-0/0/1.0
set protocols mpls interface xe-0/0/0.0
set protocols mpls interface xe-0/0/1.0

I hope You do know that according to standards LACP PDUs are untagged so passing LACP with VLAN tag is not supported.

 

HTH

Thx

Alex

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Re: LACP to pass through MX204

‎10-03-2019 02:41 AM

Dear Alex,

 

Thank you very much for your input. I have tested the configuration you provided and it works.

 

However, I have found another solution which can also bring up LACP between end to end switches.

 

set interfaces xe-0/0/0 encapsulation ethernet-bridge
set interfaces xe-0/0/0 unit 0 input-vlan-map push
set interfaces xe-0/0/0 unit 0 input-vlan-map vlan-id 123
set interfaces xe-0/0/0 unit 0 output-vlan-map pop

set interfaces xe-0/0/1 encapsulation ethernet-bridge
set interfaces xe-0/0/1 unit 0 input-vlan-map push
set interfaces xe-0/0/1 unit 0 input-vlan-map vlan-id 123
set interfaces xe-0/0/1 unit 0 output-vlan-map pop

set bridge-domains VL123 interface xe-0/0/0.0
set bridge-domains VL123 interface xe-0/0/1.0

Any advices or idea about pro and con between these two configuration template?

 

Regards,

Seyma
JNCIP-ENT, SEC, SP
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Ethernet Switching
Solution
Accepted by topic author Seyma
‎10-03-2019 06:24 PM

Re: LACP to pass through MX204

‎10-03-2019 05:11 AM

Hello,

My configuration does not cause MX204 to learn MAC addresses, Your configuration does.

Depending on the MAC count and possibility of the L2 loops downstream of QFX, You may find that MX204 experiences elevated RE CPU due to constantly relearned MACs.

HTH

Thx

Alex

_____________________________________________________________________

Please ask Your Juniper account team about Juniper Professional Services offerings.
Juniper PS can design, test & build the network/part of the network as per Your requirements

+++++++++++++++++++++++++++++++++++++++++++++

Accept as Solution = cool !
Accept as Solution+Kudo = You are a Star !
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