# cat /proc/sys/fs/nr_open 1048576
That is the ceiling on what value can be set for the open files limit (aka RLIMIT_NOFILE) with Linux. Chris. From: [email protected] [mailto:[email protected]] On Behalf Of Jan Srnicek -X (jsrnicek - PANTHEON TECHNOLOGIES at Cisco) Sent: Sunday, October 29, 2017 11:17 To: Steven Luong (sluong) <[email protected]>; vpp-dev <[email protected]> Subject: Re: [vpp-dev] Number of interfaces configurable restriction Thanks for info Steven Is there any upper boundary for „ulimit –n“, or is it just till i run out of memory ? [banner11] Jan Srnicek Engineer - Software [email protected]<mailto:[email protected]> Tel: Cisco Systems, Inc. Slovakia cisco.com [http://www.cisco.com/assets/swa/img/thinkbeforeyouprint.gif]Think before you print. This email may contain confidential and privileged material for the sole use of the intended recipient. Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply email and delete all copies of this message. Please click here<http://www.cisco.com/web/about/doing_business/legal/cri/index.html> for Company Registration Information. From: Steven Luong (sluong) Sent: Friday, October 27, 2017 6:20 PM To: Jan Srnicek -X (jsrnicek - PANTHEON TECHNOLOGIES at Cisco) <[email protected]<mailto:[email protected]>>; vpp-dev <[email protected]<mailto:[email protected]>> Subject: Re: [vpp-dev] Number of interfaces configurable restriction Jan, You have to use ulimit –n to raise the number of open files if you are going to create a lot of interfaces. Steven From: <[email protected]<mailto:[email protected]>> on behalf of "Jan Srnicek -X (jsrnicek - PANTHEON TECHNOLOGIES at Cisco)" <[email protected]<mailto:[email protected]>> Date: Friday, October 27, 2017 at 3:31 AM To: vpp-dev <[email protected]<mailto:[email protected]>> Subject: [vpp-dev] Number of interfaces configurable restriction Hi While doing some perf testing for honeycomb , i’ve came about something that seems like internal restriction of vpp. While trying to configure as much Tap interfaces as possible, when i got to 510, i started to get Caused by: io.fd.vpp.jvpp.VppCallbackException: vppApi.tap_connect_reply failed: System call error #1 (error code: -11) Is this internal restriction of vpp on number of interfaces or bug ? Note: Happens for Vhost too [anner11] Jan Srnicek Engineer - Software [email protected]<mailto:[email protected]> Tel: Cisco Systems, Inc. Slovakia cisco.com [ttp://www.cisco.com/assets/swa/img/thinkbeforeyouprint.gif]Think before you print. This email may contain confidential and privileged material for the sole use of the intended recipient. Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply email and delete all copies of this message. Please click here<http://www.cisco.com/web/about/doing_business/legal/cri/index.html> for Company Registration Information.
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