[j-nsp] Question about 100 Gbps MPC4E

Adam Vitkovsky avitkovsky at gammatelecom.com
Fri Feb 6 20:31:30 EST 2015


So how does the arp test work please?
Is it trying to ping your Juniper box (AEx ip) but using different source MAC address for every ping please? (doing 1200 ping => 1200 source macs)
Or more likely
Is it trying to ping your Juniper box (AEx ip) but using same source MAC address for every ping where each ping has a unique source IP please?

So the connection is operational as 80 pings came across just fine right?


From: Giuliano Medalha [mailto:giuliano at wztech.com.br]
Sent: 06 February 2015 09:35
To: Adam Vitkovsky
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Question about 100 Gbps MPC4E

Sorry about delay to answer this post.
We are trying to connect our JUNIPER MX960 router to a IX (Internet Exchange Point).
Once you are connected for the first time, the guys from the IX did a simple test (linux script) .. similar to an limited ARP Spoofing on every single physical port to evaluate the number of MAC answers supported for the router (minimum accepted is 1200). They will connect you to L2 main matrix.
We have another board on this router ... same MPC4E with 32 x 10G SFPP interfaces.  When we did the same ARP Spoofing test using a LAG with 8 x 10G interfaces ... it works fine.
With the new MPC4E board (2 x 100G + 8 x 10G SFPP) the test is not working. The 100G (et-x/x/x) interface configured inside an AEx logical interface does not answer more than 80 MACs ...

We did every single configuration possible on this board ... but nothing is working.
The router learns the 1200 MACs ... but the answer does not return to the pc machine tester.

I was thinking about some special configuration for this board to do it to work. JUNIPER said that there is not any special configuration needed.
Today we will do a simple test using ettercap and a switch with 10G connections directly to the new board to see if we got something different.

Thanks a lot,


Giuliano Cardozo Medalha
Systems Engineer
+55 (17) 3011-3811
+55 (17) 98112-5394
giuliano at wztech.com.br<mailto:giuliano at wztech.com.br>

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On Fri, Jan 30, 2015 at 6:53 AM, Adam Vitkovsky <avitkovsky at gammatelecom.com<mailto:avitkovsky at gammatelecom.com>> wrote:
Hello Giuliano,

I somehow did not get what is not working exactly?
Are the ports not coming up? Is the LACP not coming up? Or you can't pass frames between the VLANs?

> -----Original Message-----
> From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net<mailto:juniper-nsp-bounces at puck.nether.net>] On Behalf
> Of Giuliano Medalha
> Sent: 30 January 2015 01:13
> To: juniper-nsp at puck.nether.net<mailto:juniper-nsp at puck.nether.net>
> Subject: [j-nsp] Question about 100 Gbps MPC4E
> ​People,
> We have a router (MX960) with the following MPC4E board (with SCBE2):
> http://www.juniper.net/documentation/en_US/release-
> independent/junos/topics/reference/general/mpc4e-2x100ge-8x10ge.html
> We are using it configured as aggregated ethernet AE3 (with LACP)
> connecting to a CISCO ASR9000 router (minimum-links 1 and link-speed 100g
> with MTU 9192) using flexible-vlan-tagging and 2 vlans (unit 100 and unit
> 200).
> I have found some specific documents about running this board on a special
> way called SA-MULTICAST.
> http://www.juniper.net/techpubs/en_US/junos14.2/topics/task/configurati
> on/interfaces-mpc4e-100-ge-interop-sa-multicast.html
> My question is ... there is some special way to configure this board to
> talk with CISCO ASR9000 board ? Does cisco needs this king of
> configuration on juniper to work ?
> Something like 2 aggregated of 50 Gbps interfaces ? et-4/0/1:0 et-4/0/1:1
> Do you have something similar in your backbones ? Its necessary to do
> some special config or adjustment ?
> There is some MAC-LEARNING limit configured by default on this board ?
> Could you please help me how to find the correct way to put it to work ?
> Thanks a lot,
> Giuliano
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net<mailto:juniper-nsp at puck.nether.net>
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