“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> Sent: Friday, April 6, 2018 12:16 PM To: Matus Fabian -X (matfabia - PANTHEON TECHNOLOGIES at Cisco) <matfa...@cisco.com> Cc: 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!
