Junos
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Junos

Connecting MX240 to Cisco VG224

[ Edited ]
‎06-24-2019 10:40 AM

Hi,

 

I am trying to connect a Juniper MX240 to a cisco VG224. The Cisco VG224 has a FastEthernet port configured to 100/duplex.

On the Juniper MX240 (15.1R6.7), I have ge-2/1/2 port with copper SFP (SP7041-JN2) set to the following config :

 

set interfaces ge-2/1/2 speed 100m
set interfaces ge-2/1/2 link-mode full-duplex
set interfaces ge-2/1/2 gigether-options no-auto-negotiation
set interfaces ge-2/1/2 unit 0 proxy-arp
set interfaces ge-2/1/2 unit 0 family inet no-redirects

 

Having said that, the link is not up between the two devices.

 

Please advise.

 

Thank you!

 

11 REPLIES 11
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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 11:40 AM

May I know what type of card is being used in MX? You might need a tri-rate (10m 100m 1000m) sfp to make it work 

 

 


Mengzhe Hu
JNCIE x 3 (SP DC ENT)
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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 11:47 AM

Your configs on Juniper MX240 looks correct to me.

Simlar setup you can find in Juniper KB

https://kb.juniper.net/InfoCenter/index?page=content&id=KB22315&cat=EX6210&actp=LIST

 

What is configured on Cisco side?

 

Have you tried to replace sfp/cable? 

 

 


Mengzhe Hu
JNCIE x 3 (SP DC ENT)
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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 12:17 PM

It is a MX-MPC1 3D.

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 12:18 PM

Yes I tried changing the SFP and cable both.

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 12:57 PM

Let's see what we are seeing from "show interface ge-2/1/2  extensive" output 


Mengzhe Hu
JNCIE x 3 (SP DC ENT)
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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 01:45 PM

Please find the output attached.

Attachments

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-24-2019 07:00 PM

Hello,

Please make sure you have disabled auto-negotiation on both side.  Please provide following output

show chassis hardware detail
show chassis pic pic-slot 0 fpc-slot 2
show chassis pic pic-slot 1 fpc-slot 2

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-25-2019 12:57 AM

Hello,

 

I see you have provided a link speed, can you change it to auto.

Can you use below config and check the status.

 

MX> show configuration interfaces ge-2/1/8
speed auto;
gigether-options {
        auto-negotiation;
}

Regards,
Akash


'Please Mark My Solution Accepted if it Helped, Kudos are Appreciated too!'

 

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-25-2019 12:41 PM

Please find attached output.

Attachments

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-25-2019 12:43 PM

Hello Akash,

 

I did try auto/auto on both ends. but no luck.

 

Thanks!

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Junos

Re: Connecting MX240 to Cisco VG224

‎06-25-2019 02:51 PM

Have you tried using a cross cable? As this is running at 100m (Fast ethernet) there is no autosensing like with 1G.

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