Re: Brocade MLXe Selective FIB Population

[i3D.net - Martijn Schmidt]

Hi Graham,

I haven't personally tried this but do have plenty of hands-on
experience with the MLXe platform. As far as I understood from previous
conversations with my Brocade SE, if your firmware is recent enough and
the card doesn't have any ports used in a certain VRF the selective FIB
download will happen automatically.. you can verify this with the "show
cam-partition usage" command.

However, if you want to load a full Internet routing table while running
a VRF-capable CAM profile you will need -X2 series linecards with the
"cam-mode amod slot #" setting for ports which belong to the default VRF
(e.g. the one which contains the 600k+ IPv4 prefixes). All the other
cards whose FIB is going to be selectively populated may have -X, -M, or
even -DM route table scalability.

Best regards,
Martijn Schmidt

On 11/29/2016 03:19 PM, Graham Johnston wrote:
> Does anybody have information on how to selective populate the IPv4 FIB on a 
> Brocade MLXe?
>
> Graham Johnston
> Network Planner
> Westman Communications Group
> 204.717.2829
> johnst...@westmancom.com
> P think green; don't print this email.
>

Re: 10G switch drops traffic for a split second

[Lee]

On 11/30/16, Mikael Abrahamsson  wrote:
> On Tue, 29 Nov 2016, TJ Trout wrote:
>
>> Is it possible to over run the buffers of a 320gbps backplane switch
>> with only 1.5gbps traffic? I think the switch is rated for 140m PPS and
>> I'm only pushing 100k PPS
>
> If your switch is the typical small-buffered-switch that has become more
> and more common the past few years, then the entire switch might have
> buffer to keep packets for 0.1ms or less. So if someone says "flow control
> off" for 0.1ms, depending on the implementation, you might then start
> seeing packet drops on all ports until that device turns flow control
> back on.

I always disabled flow control on the theory that VoIP & flow control
are incompatible.
just out of curiosity - anyone have it enabled?  if so, why?

Lee

Re: 10G switch drops traffic for a split second

[Mikael Abrahamsson]

On Tue, 29 Nov 2016, TJ Trout wrote:

Is it possible to over run the buffers of a 320gbps backplane switch 
with only 1.5gbps traffic? I think the switch is rated for 140m PPS and 
I'm only pushing 100k PPS


If your switch is the typical small-buffered-switch that has become more 
and more common the past few years, then the entire switch might have 
buffer to keep packets for 0.1ms or less. So if someone says "flow control 
off" for 0.1ms, depending on the implementation, you might then start 
seeing packet drops on all ports until that device turns flow control 
back on.


--
Mikael Abrahamssonemail: swm...@swm.pp.se

Disney Brands GeoIP Contact

[James Baldwin]

Does anyone have contacts at Disney or an associated brand (Hulu, Disney,
ESPN)? They all appear to have out of date or incorrect GeoIP information
for our Level3 block.

I have been able to whitelist our corporate locations with Hulu however I
have been unable to reach anyone at the other sites. I would love to find
out which third party they are using for their information and correct the
problem at the source (MaxMind is correct).

- James

BRAS/BNG Suggestion

[Lorenzo Mainardi]

Good morning,
Could you suggest some vendors of BRAS/BNG for PPPoE termination?
We have more than 20.000 users.

In my short list there are already Juniper, Cisco and NOKIA/ALU.
Do you have any other honorable brand or good experiences?
Regards
digitel

Via della Fortezza 6 - 50129 Firenze
www.digitelitalia.com - 800 901 669

Ing. Lorenzo Mainardi

Tel +39 055 4624933
Fax +39 055 4624 947
l...@digitelitalia.com

Re: 10G switch drops traffic for a split second

[Tomi Hakala]

If you have congestion on outgoing interfaces you are most likely 
running out of packet buffer space on your switch. Especially campus 
class switches have small buffers, 4 MB or so and it can run out during 
high bursts and interface congestion. With some switches you could 
alleviate problem by rearranging congested interfaces to ports with 
seperate buffer pool, but you have to check with your switch vendor or 
documentation if your switches have shared or split buffer pools. Or 
just replace your switches with ones having deeper buffers.


Tomi


On 29.11.2016 11.06, TJ Trout wrote:

I recently upgraded my core network from 1G to 10G and after the upgrade I
have noticed that my 10G switch during peak traffic (1500mbps, 100,000pps)
seems to be dropping traffic for a split second across all ports and all
vlans. I immediately replaced the switch with a different brand/model and
the problem persists.

Sometimes traffic drops to zero, others it drops to 50%, problem is very
random but seems to occur with much more frequency during high PPS (pushing
high traffic / iperf does not induce problem)

Could this be MTU? I've tried flow control, hard code duplex, stp on/off etc

I'm at a loss any ideas?

TJ Trout
Volt Broadband