Information on forwarding queue occupation in a Linux router Post: 303039947

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Special Forums UNIX and Linux Applications Information on forwarding queue occupation in a Linux router Post 303039947 by i_mll on Friday 18th of October 2019 12:29:31 PM

10-18-2019

Registered User

Information on forwarding queue occupation in a Linux router

Hello.
I have an OpenWrt router forwarding traffic from a network to another and I'm building a monitoring tool that requires information about the packet queue/ ring buffer (in the receiving side/interface - rx) occupation, alerting me when it is close to its maximum capacity.

However, after analysing the following files (linux filesystem):

tcp_mem/tcp_rmem/tcp_wmem in /proc/sys/net/ipv4
tx_queue_len in /sys/class/net/(interface)
sockstat in /proc/net

I concluded these files would only be relevant for my program if the router was the destination or source of the TCP packets, which is not the case. So, as I discussed with a professor of mine, the metrics these files provide are not relevant in a forwarding situation, as the packets do not go to the TCP queues.

If that's true, then where (in what folder/file) can I find information about the router's forwarding queue's current occupation and its maximum occupation, if there's any information on the matter? Note that this question is not limited to the OpenWrt OS, but any linux system.

i_mll

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LEARN ABOUT DEBIAN

xorpsh

xorp(1) 						      General Commands Manual							   xorp(1)

NAME

       xorpsh -- XORP Command Shell

SYNOPSIS

       xorpsh [-c command]  [-t directory]  [-e]  [-h]	[-v]

DESCRIPTION

       This manual page documents briefly the xorpsh command.

       This manual page was written for the Debian distribution because the original program does not have a manual page.

       xorpsh  is  the command used to interact with a eXtensible Open Router Platform (XORP) router. This command starts up a command line inter-
       face (CLI), that allows the configuration of the router and monitoring of the router state.

       The xorpsh command provides an interactive command shell to a XORP user, similar in many ways to the role played by a  Unix  shell.   In  a
       production  router  xorpsh might be set up as an user's login shell - they would login to the router via ssh and be directly in the xorpsh.
       It can also be run directly from the Unix command line.

       xorpsh should normally be run as a regular user; it is neither necessary or desirable to run it as root.  If an user is to be permitted	to
       make changes to the running router configuration, that user needs to be in the Unix group xorp.

       The  Debian  package installation automatically sets up both a xorp user and a xorp group to which this user belongs. However, any user can
       run the xorpsh command unless locally restricted by the administrator.

OPTIONS

       xorpsh allows the following options:

       -h	 Show summary of options.

       -v	 Print verbose information.

       -c command
		 Specify command(s) to execute.

       -t directory
		 Specify templates directory.

       -e	 Exit immediately if cannot connect to the rtrmgr

SEE ALSO

       xorp_rtrmgr (8)

       This program is documented fully in the Xorp User Manual, chapter Command Structure, available at /usr/share/doc/xorp-doc/ in  Debian  sys-
       tems when the xorp-doc package is installed.

AUTHOR

       XORP is Copyright (c) 2001-2009 XORP, Inc.

       This  manual  page was written by Javier Fernandez-Sanguino jfs@debian.org for the Debian system (but may be used by others). For licensing
       details please see /usr/share/doc/xorp/copyright.

																	   xorp(1)