perfSONAR User Q&A and Other Discussion

["Manglos, Andrew P (173E)" <>]

Hello George,

 

I made the changes from the other response and now am sometimes able to ping the second interface. It will ping for about ~5 packets then drop for a little bit then ping again. It seems to continue to do that. Eth0 seems to be fine and pings with no problem.

 

 

 

-Andrew Manglos

Network Engineer

Work#: 818-393-2419 (x32419)

Cell#: 626-710-2092

 

From: Uhl, George D. (GSFC-423.0)[SGT INC] [mailto:]
Sent: Thursday, April 21, 2016 1:44 PM
To: Manglos, Andrew P (173E) <>;
Cc:
Subject: Re: [perfsonar-user] Dual NIC's on Same Subnet

 

Andrew,

 

I’m currently running perfsonar nodes with two  interfaces in the same subnet.  Are the following sysctl settings activated in your kernel?

 

net.ipv4.conf.all.arp_ignore=1

net.ipv4.conf.all.arp_announce=2

net.ipv4.conf.default.arp_filter=1

net.ipv4.conf.all.arp_filter=1

 

Can you ping out from both interfaces on your host?

 

ping [-I interface or address] destination

 

-George

 

 

From: <> on behalf of "Manglos, Andrew P (173E)" <>
Date: Thursday, April 21, 2016 at 4:28 PM
To: "" <>
Cc: "" <>
Subject: [perfsonar-user] Dual NIC's on Same Subnet

 

Hello,

 

I would like to setup a perfSonar node to have two interfaces on the same subnet (1 for throughput and 1 for latency). I checked on the perfSonar website and found the below link that says it is possible but it only went over how to configure two interfaces on separate networks. Currently, when I have both interfaces up and on the same subnet only 1 interface will respond to pings. If I shutdown the working interface, the non-working interface will start responding. Any help would be greatly appreciated.

 

 

http://docs.perfsonar.net/manage_dual_xface.html

 

 

-Andrew Manglos

Network Engineer

Work#: 818-393-2419 (x32419)

Cell#: 626-710-2092