Bug 1369529

Summary:	file downloads in ipxe environment is very slow for 40Gb Cisco VIC 1385
Product:	Red Hat Enterprise Linux 7	Reporter:	Jaison Raju <jraju>
Component:	ipxe	Assignee:	Neil Horman <nhorman>
ipxe sub component:	ipxe-roms	QA Contact:	Ma Yuying <yuma>
Status:	CLOSED WONTFIX	Docs Contact:
Severity:	medium
Priority:	unspecified	CC:	cww, jraju, nhorman, prarit, vaggarwa
Version:	7.2	Keywords:	Unconfirmed
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2016-11-23 16:55:57 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jaison Raju 2016-08-23 16:37:59 UTC

Description of problem:
While OpenStack Platform Director deploys or introspects overcloud node ,
the nodes pxe boot to get kernel & ramdisk but it take over 5mins to download these images that are togather less than 1.5GB .
The server uses Cisco UCS Virtual Interface Card 1385 .
This server is in spine leaf network architecture .

This issue is not seen while RHEL is running on the systems .


Version-Release number of selected component (if applicable):
* Cisco UCS Virtual Interface Card 1385 - http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/unified-computing-system-adapters/datasheet-c78-734727.html
* Spine N9K-C9336PQ - 160Gb backbone
* Leaf N9K-C9332PQ - 40Gb

How reproducible:
Always on customer environment.

Steps to Reproduce:
1.
2.
3.

Actual results:
ramdisk & kernel takes long time to download .

Expected results:
ramdisk & kernel download should take less that 2-3 sec , once started .

Additional info:

Comment 7 Neil Horman 2016-09-23 14:00:51 UTC

Can you please tcpdump this connection from the pxe server so that we can get an idea what the traffic pattern looks like?

Comment 8 Neil Horman 2016-10-28 16:59:05 UTC

ping, any update here?