Hi, Referring to a mail I chain I started on this email group a couple of weeks ago. The support engineer in Netgear asked me for a simple description and how it could be replicated.
For reference and in case anyone here is interested I attach this
description and a howto replicate.
Essentially the Netgear switch sends a packet for each port that has SRC
MAC == DST MAC:
- IN PORT: 1
- SRC_MAC: *00:1e:be:17:eb:9a*
- DST_MAC: *00:1e:be:17:eb:9a*
This causes the simple_switch_13.py to ADD FLOW with the in port and the
out port the same.
- Priority: 1
- OFPMatch(oxm_fields={*'in_port': 1*, 'eth_dst':'00:1e:be:17:eb:9a'})
- [OFPActionOutput(len=16,max_len=65509,*port=1*,type=0)]
- Buffer ID: 267
Would it be safe to add a loop to drop add_flow() calls where the Match
port and the Action port are the same as well as the src and dst MAC
addresses? Is there any condition where that would be normal behaviour?
regards,
Diarmuid
--
*Irish by birth, located in Uganda but Munster by the grace of God.*
SDN_problem.pdf
Description: Adobe PDF document
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