Only CLI commands, no startup config changes required Matus
From: Hamid Rasool <14mseesras...@seecs.edu.pk> Sent: Monday, April 9, 2018 8:06 AM To: Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com>; vpp-dev <vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] #vpp CGNAT implementation in VPP Thanks again Matus. Specially for updating the Wiki! Do I need to change anything in the startup config to enable ipfix in NAT or do the CLI commands in the example config work as standard? On Mon, Apr 9, 2018 at 10:20 AM, Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com<mailto:matfa...@cisco.com>> wrote: Supported templates for deterministic NAT https://wiki.fd.io/view/VPP/NAT#IPFIX_templates Supported templates for standard NAT https://wiki.fd.io/view/VPP/NAT#NAT_IPFIX_logging IPFix data and template records are transmitted over UDP (https://tools.ietf.org/html/rfc7011, https://tools.ietf.org/html/rfc8158) IPFix example configuration https://wiki.fd.io/view/VPP/NAT#Enable_NAT_plugin_IPFIX_logging_example Matus From: Hamid Rasool <14mseesras...@seecs.edu.pk<mailto:14mseesras...@seecs.edu.pk>> Sent: Friday, April 6, 2018 4:23 PM To: Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com<mailto:matfa...@cisco.com>> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] #vpp CGNAT implementation in VPP Thanks Matus for the rapid response. The del command did the trick and I will try to repeat the setup for 18.04-rc1 build. I also got some more info through the command 'show nat44 detail' which did not show up by ? in the CLI by default. About IPFIX logging, can you suggest an example template to perform the logging: e.g. nat { NAT44 Addresses exhausted NAT44 Session create NAT44 Session delete } Also, any pointers to access these IPFIX logs for nat session details without using deterministic NAT once the logging has been enable would also be very helpful. Regards, Hamid On Fri, Apr 6, 2018 at 3:42 PM, Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com<mailto:matfa...@cisco.com>> wrote: “show nat44 deterministic mappings” probably doesn’t work because you use older version of the VPP (this was changed in 1804) To delete NAT deterministic mapping use “nat44 deterministic add in <addr>/<plen> out <addr>/<plen> del” Currently you can’t alocate specific number of ports of the external address to the internal clients. It is possible to implenet this, patches are welcome. NAT plugin use IPfix for logging events https://wiki.fd.io/view/VPP/NAT#IPFIX_templates. Deterministic NAT doesn’t log session since internall address is statically mapped to set of external ports of the address (purpose of deterministic NAT is to reduce logging https://tools.ietf.org/html/rfc7422). Matus From: Hamid Rasool <14mseesras...@seecs.edu.pk<mailto:14mseesras...@seecs.edu.pk>> Sent: Friday, April 6, 2018 12:16 PM To: Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com<mailto:matfa...@cisco.com>> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] #vpp CGNAT implementation in VPP Thanks Fabian. I have configured these steps and it seems to work (although some variations of nat deterministic add command caused vpp to crash and reset configurations though). However, there is another command in the VPP/NAT wiki: "show nat44 deterministic mappings" which does not seem to work. The "show nat44" command only seem to work however: vpp# nat44 deterministic add in 10.10.3.0/25<http://10.10.3.0/25> out 192.168.100.64/28<http://192.168.100.64/28> vpp# show nat44 NAT plugin mode: deterministic mapping udp timeout: 300sec tcp-established timeout: 7440sec tcp-transitory timeout: 240sec icmp timeout: 60sec 1 deterministic mappings I want to ask how can we delete a pool mapping once we have set it or even change it because there seems to be no options to do that. Another query is about how can we allocate a specific number of ports of the external address to the internal clients. Lets say I want to map 8 internal addresses to 1 external for a pool of external addresses, which makes about 8000 ports (out of 65000) for each internal address. Is there any way to implement. Last question for now, where are the session logs stored for NAT for each flow of packet. Does VPP provide syslog stats or any flow records for nat sessions? Thanks again! [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> On Mon, Mar 19, 2018 at 5:19 PM, Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com<mailto:matfa...@cisco.com>> wrote: Hi, There is example of CGNAT configuration for currently supported feature set https://wiki.fd.io/view/VPP/NAT#Example_configuration Basically you need do following 3 steps: To enable CGNAT mode of NAT plugin add following to startup config: “nat { deterministic }” Set inside and outside interfaces: set interface nat44 in <intfc> out <intfc> Set pool address range for inside network range: nat44 deterministic add in <addr>/<plen> out <addr>/<plen> That is all you can currently configure. Matus From: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> On Behalf Of Hamid via Lists.Fd.Io<http://Lists.Fd.Io> Sent: Monday, March 19, 2018 1:03 PM To: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: [vpp-dev] #vpp CGNAT implementation in VPP Hi, I have a Ubuntu server machine having 32 cores and four 1 Gigabit NICs with KVM hypervisor. I want to test VPP performance for CGNAT in NAT444 mode while supporting routing protocols like BGP and IS-IS on VM topology setup. Kindly direct me somewhere to get me started. The usage of CGNAT with a pool of out address ranges and allocating port numbers is not directly explained in the NAT plugin Wiki page. Any info regarding how to generate packet traffic to check performance in terms of number of concurrent sessions handled by CGNAT on my hardware will also be appreciated. I have tried the progressive VPP tutorial but some of the switching related exercises are not functioning as expected and there is no similar tutorial or guide to apply CG-NAT along with routing as a PoC software router would do. Integration with FRR as per FRR wiki was also outdated and could not be achieved on my setup. Waiting for suggestions. Thanks!
