# dumbno

**Repository Path**: mirrors_esnet/dumbno

## Basic Information

- **Project Name**: dumbno
- **Description**: No elephant flows - flow shuting for Arista switches using EOS API
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-24
- **Last Updated**: 2026-03-15

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

No elephant flows!

Usage
=====

Copy examples/example\_dumbno.cfg and edit to match your environment.

Run initial setup and start:

    ./dumbno.py dumbno.cfg setup

Later runs:

    ./dumbno.py dumbno.cfg


Shunting a flow
===============

    >>> import dumbno
    >>> d = dumbno.ACLClient('localhost')
    >>> d.add_acl(src="192.168.1.1", dst="192.168.1.2")
    'ok'
    >>> d.add_acl(src="192.168.1.1", dst="192.168.1.2", proto='tcp', sport='123', dport='456')
    'ok'

The log will show the rule being added, and after a minute or so you will see
the per-port rules get auto purged from all access groups:

    2014-04-28 11:21:11,539 INFO op=ADD seq=501 rule=u'ip host 192.168.1.1  host 192.168.1.2 '

    2014-04-28 11:21:32,982 INFO op=REMOVE acl=bulk_8 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,982 INFO op=REMOVE acl=bulk_7 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_6 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_5 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_4 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_3 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None
    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_2 seq=501 rule="ip host 192.168.1.1 host 192.168.1.2" matches=None ago=None

A rule that had activity will look like this:

    2014-04-28 11:21:32,983 INFO op=REMOVE acl=bulk_2 seq=729 rule="tcp host 192.168.1.2 eq 39329 host 192.168.1.1 eq 39032" matches=359 ago=0:01:22


About Configuring Port mapping
===============================

Using a single ACL shared by all ingress ports limits the total number of
entries you can have.  If you have a lot of ingress ports map them to
distinct ACLS which will distribute the entries across TCAM.

IPv6 Support
============

If you are using conn-bulk.bro, you also need to make sure the IPv6 ranges
are included in the 'hosts' table:

    const hosts: table[subnet] of PortRange = {[0.0.0.0/0] = PortRange(),
                                               [[::]/0] = PortRange()} &redef;