LISTSERV mailing list manager LISTSERV 16.0

Help for MICE-DISCUSS Archives


MICE-DISCUSS Archives

MICE-DISCUSS Archives


MICE-DISCUSS@LISTS.IPHOUSE.NET


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

MICE-DISCUSS Home

MICE-DISCUSS Home

MICE-DISCUSS  September 2016

MICE-DISCUSS September 2016

Subject:

Re: EX4200 (1G Switch) Packet Loss -> 10G Participants

From:

Andrew Hoyos <[log in to unmask]>

Reply-To:

MICE Discuss <[log in to unmask]>

Date:

Mon, 19 Sep 2016 16:06:38 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (28 lines)

> On Sep 19, 2016, at 2:19 PM, Doug McIntyre <[log in to unmask]> wrote:
> 
> On Mon, Sep 19, 2016 at 02:03:41PM -0500, Andrew Hoyos wrote:
>> What medium is the VC built on and physical topology? Just VC cables on the rear ringed through all 3?
> 
> Yes, VC cabling in a ring, and using the VCP modules and cabling on the EX4550.

What’s the actual topology though? 4500 -> 4200 -> 4550 -> back to 4500?

>> Specific to any single 4500 destination or is it doing it to both the 4500 and the 4550?
> 
> He wasn't aware of the EX4550, there aren't many ports lit there yet,
> he has just been testing different ports on the the EX4500. 

UW Madison operates some IPerf servers you could try against too, see: https://kb.wisc.edu/uwsysnet/page.php?id=41947
They are on the 4550, it appears, so more data points to be gleaned there.

>> Check ‘show virtual-chassis vc-path source-interface <src int> destination-interface <dest int>’. Common VC port in the mix to any of the reported loss paths?
> 
> I think in general, the VC ports run Active/Passive, so only one is
> "active" at a time going out of a box without load balancing, so only
> one (ie. vcp-1) typically shows up for all paths.

Kinda, there is a SPF calculation that happens based on src/dst interfaces. It matters which PFE of the switch the port is on (1 hop != switch, it’s actually each PFE hop). Depending on the topology here, things could be going a variety of ways.

--
Andrew Hoyos
[log in to unmask]

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010

ATOM RSS1 RSS2



LISTS.IPHOUSE.NET

CataList Email List Search Powered by the LISTSERV Email List Manager