[f-nsp] MLX throughput issues

[nethub at gmail.com]

We are not using LAG anywhere in our network.

 

 

From: G B [mailto:georgeb at gmail.com] 
Sent: Friday, February 13, 2015 1:16 AM
To: nethub at gmail.com
Cc: Niels Bakker; foundry-nsp
Subject: Re: [f-nsp] MLX throughput issues

 

Wondering if you might have some imbalance in a LAG somewhere.  Where it is hashing too much traffic to one link of a lag.  By default it uses the mac address of the next layer 2 hop and traffic going to a gateway will all hash to the same link.  Are there any LAGs involved?  Is there a major imbalance of traffic on a LAG in the traffic path?

 

On Thu, Feb 12, 2015 at 9:43 PM, <nethub at gmail.com> wrote:

We are only accepting about 300k IPv4 routes currently (we filter to reduce
the table size).  We are on the multi-service-2 CAM partition profile and we
have the system-max values for ip-route and ip-cache set to 445K.

Also, we upgraded to 5.6f today to see if that would help but it did not
change anything.

CPU usage is very low across the board (under 10% use on everything), so if
it is routing in software, it isn't causing a jump in CPU load.


-----Original Message-----
From: foundry-nsp [mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of

Niels Bakker
Sent: Thursday, February 12, 2015 8:38 PM
To: foundry-nsp at puck.nether.net
Subject: Re: [f-nsp] MLX throughput issues

* nethub at gmail.com (nethub at gmail.com) [Fri 13 Feb 2015, 01:45 CET]:
>As I stated in the first message, the Juniper EX3200 is a downstream
>BGP customer that is single homed to our network, so it is on a
>different ASN and the communication between my network and his network
>is layer 3.

Are you running that MLX with a full BGP table?  20 MB/sec sounds like
you're forwarding packets over its CPU, perhaps because it ran out of CAM
space.


        -- Niels.

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