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2022-10-06 19:23:01 +0000 received badge ● Popular Question (source)
2022-02-10 11:18:20 +0000 commented answer TCP traffic and OpenvSwitch

Hello @SYN-bit. At present I've switched all hosts back to using standard MTU (i.e. 1500) because it works. I did a bit
2022-02-07 10:45:56 +0000 marked best answer TCP traffic and OpenvSwitch

I'm having an issue with OpenvSwitch whereby I have ping traffic passing but am unable to pass any tcp traffic (e.g. SSH).

I've attached two pcap files which show the following:

  • Host 1 (10.2.1.1): ping -c 3 10.2.2.1 && ssh 10.2.2.1
  • Brief Pause
  • Host 2 (10.2.2.1): ping -c 3 10.2.1.1 && ssh 10.2.1.1

As you can see, ping passes but ssh doesn't.

This seems to be in contradiction to my OVS flow config which is simple as as follows (these are the only flows configured on this OVS bridge) :

ovs-ofctl add-flow lon2local dl_type=0x800,nw_src=10.2.0.0/20,nw_dst=10.2.1.0/24,actions=output:73
ovs-ofctl add-flow lon2local dl_type=0x800,nw_src=10.2.0.0/20,nw_dst=10.2.2.0/24,actions=output:76
ovs-ofctl add-flow lon2local arp,nw_dst=10.2.1.0/24,actions=output:73
ovs-ofctl add-flow lon2local arp,nw_dst=10.2.2.0/24,actions=output:76

Hopefully somebody here is familiar with OVS, has seen these sort of flow issues before and can suggest how to fix it ?

PCAPS: https://send.tresorit.com/a#_vfy8aLsU...
2022-02-07 10:45:56 +0000 received badge ● Scholar (source)
2022-02-07 10:00:39 +0000 commented answer TCP traffic and OpenvSwitch

Thank you for your observation @SYN-bit. As far as I know jumbo frames are enabled, but I will check this today and com
2022-02-06 18:02:42 +0000 commented question TCP traffic and OpenvSwitch

thanks @grahamb !

2022-02-06 18:02:29 +0000 received badge ● Editor (source)
2022-02-06 18:02:29 +0000 edited question TCP traffic and OpenvSwitch

TCP traffic and OpenvSwitch I'm having an issue with OpenvSwitch whereby I have ping traffic passing but am unable to pa
2022-02-06 17:33:05 +0000 asked a question TCP traffic and OpenvSwitch

TCP traffic and OpenvSwitch I'm having an issue with OpenvSwitch whereby I have ping traffic passing but am unable to pa