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: ipxeAssignee: 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: 7.2Keywords: Unconfirmed
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
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:

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?