+++ /dev/null
-Network Address Translation IPv4 to IPv4
-----------------------------------------
-
-NAT44 Prefix Bindings
-^^^^^^^^^^^^^^^^^^^^^
-
-NAT44 prefix bindings should be representative to target applications,
-where a number of private IPv4 addresses from the range defined by
-:rfc:`1918` is mapped to a smaller set of public IPv4 addresses from the
-public range.
-
-Following quantities are used to describe inside to outside IP address
-and port bindings scenarios:
-
-- inside-addresses, ports-per-inside-address, number of inside source
- addresses (representing inside hosts) and number of TCP/UDP source
- ports per inside source address.
-- outside-addresses, number of outside (public) source addresses
- allocated to NAT44. The maximal number of ports-per-outside-address
- usable for NAT is 64 512 (in non-reserved port range 1024-65535,
- :rfc:`4787`).
-- sharing-ratio, equal to inside-addresses / outside-addresses.
-
-CSIT NAT44 tests are designed to take into account the maximum number of
-ports (sessions) required per inside host (inside-address) and at the
-same time to maximize the use of outside-address range by using all
-available outside ports. With this in mind, the following scheme of
-NAT44 sharing ratios has been devised for use in CSIT:
-
-+--------------------------+---------------+
-| ports-per-inside-address | sharing-ratio |
-+==========================+===============+
-| 63 | 1024 |
-+--------------------------+---------------+
-| 126 | 512 |
-+--------------------------+---------------+
-| 252 | 256 |
-+--------------------------+---------------+
-| 504 | 128 |
-+--------------------------+---------------+
-
-Initial CSIT NAT44 tests, including associated TG/TRex traffic profiles,
-are based on ports-per-inside-address set to 63 and the sharing ratio of
-1024. This approach is currently used for all NAT44 tests including
-NAT44det (NAT44 deterministic used for Carrier Grade NAT applications)
-and NAT44ed.
-
-..
- .. TODO::
-
- Note that in the latter case, due to overloading of (ouside-address,
- outside-port) tuple for different endpoint destinations the actual
- sharing ratio is likely to different, as it will depend on the
- destination addresses used by NAT'ed flows.
-
-Private address ranges to be used in tests:
-
-- 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
-
- - Total of 2^16 (65 536) of usable IPv4 addresses.
- - Used in tests for up to 65 536 inside addresses (inside hosts).
-
-- 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
-
- - Total of 2^20 (1 048 576) of usable IPv4 addresses.
- - Used in tests for up to 1 048 576 inside addresses (inside hosts).
-
-NAT44 Session Scale
-~~~~~~~~~~~~~~~~~~~
-
-NAT44 session scale tested is govern by the following logic:
-
-- Number of inside addresses/hosts H[i] = (H[i-1] x 2^2) with H(0)=1 024, i = 1,2,3, ...
-
- - H[i] = 1 024, 4 096, 16 384, 65 536, 262 144, 1 048 576, ...
-
-- Number of sessions S[i](ports-per-host) = H[i] * ports-per-inside-address
-
- - ports-per-host = 63
-
-+---+---------+------------+
-| i | hosts | sessions |
-+===+=========+============+
-| 0 | 1 024 | 64 512 |
-+---+---------+------------+
-| 1 | 4 096 | 258 048 |
-+---+---------+------------+
-| 2 | 16 384 | 1 032 192 |
-+---+---------+------------+
-| 3 | 65 536 | 4 128 768 |
-+---+---------+------------+
-| 4 | 262 144 | 16 515 072 |
-+---+---------+------------+
-
-NAT44 Deterministic
-^^^^^^^^^^^^^^^^^^^
-
-NAT44det throughput tests are using TRex STL (Stateless) API and traffic
-profiles, similar to all other stateless packet forwarding tests like
-ip4, ip6 and l2, sending UDP packets in both directions
-inside-to-outside and outside-to-inside. See
-:ref:`data_plane_throughput` for more detail.
-
-NAT44det translation entries are created during the ramp-up phase
-preceding the throughput test, followed by verification that all entries
-are present, before proceeding to the throughput test. This ensures
-session setup does not impact the forwarding performance test.
-
-Associated CSIT test cases use the following naming scheme to indicate
-NAT44det scenario tested:
-
-- ethip4udp-nat44det-h{H}-p{P}-s{S}-[mrr|ndrpdr|soak]
-
- - {H}, number of inside hosts, H = 1024, 4096, 16384, 65536, 262144.
- - {P}, number of ports per inside host, P = 63.
- - {S}, number of sessions, S = 64512, 258048, 1032192, 4128768,
- 16515072.
- - [mrr|ndrpdr|soak], MRR, NDRPDR or SOAK test.
-
-NAT44 Endpoint-Dependent
-^^^^^^^^^^^^^^^^^^^^^^^^
-
-NAT44ed is benchmarked using following methodologies:
-
-- Uni-directional throughput using *stateless* traffic profile.
-- Connections-per-second using *stateful* traffic profile.
-- Bi-directional throughput using *stateful* traffic profile.
-
-Uni-directional NAT44ed throughput tests are using TRex STL (Stateless)
-APIs and traffic profiles, but with packets sent only in
-inside-to-outside direction. Due to indeterministic bindings of outside
-to inside (src_addr,src_port) that are created dynamically at flow start
-bidirectional testing is not possible with stateless traffic profiles.
-See :ref:`data_plane_throughput` for more detail.
-
-Similarly to NAT44det, NAT44ed uni-directional throughput tests include
-a ramp-up phase to establish and verify the presence of required NAT44ed
-binding entries. NAT44ed CPS (connections-per-second) and throughput /
-PPS stateful tests do not have a ramp-up phase.
-
-Stateful NAT44ed tests are using TRex ASTF (Advanced Stateful) APIs and
-traffic profiles, with packets sent in both directions. Tests are run
-with both UDP and TCP/IP sessions.
-
-Associated CSIT test cases use the following naming scheme to indicate
-NAT44DET case tested:
-
-- Stateless: ethip4udp-nat44ed-h{H}-p{P}-s{S}-udir-[mrr|ndrpdr|soak]
-
- - {H}, number of inside hosts, H = 1024, 4096, 16384, 65536, 262144.
- - {P}, number of ports per inside host, P = 63.
- - {S}, number of sessions, S = 64512, 258048, 1032192, 4128768,
- 16515072.
- - udir-[mrr|ndrpdr|soak], unidirectional stateless tests MRR, NDRPDR
- or SOAK.
-
-- Stateful: ethip4[udp|tcp]-nat44ed-h{H}-p{P}-s{S}-[cps|pps]-[mrr|ndrpdr]
-
- - [udp|tcp], UDP or TCP/IP sessions
- - {H}, number of inside hosts, H = 1024, 4096, 16384, 65536, 262144.
- - {P}, number of ports per inside host, P = 63.
- - {S}, number of sessions, S = 64512, 258048, 1032192, 4128768,
- 16515072.
- - [cps|pps], connections-per-second session establishment rate or
- packets-per-second throughput rate.
- - [mrr|ndrpdr], bidirectional stateful tests MRR, NDRPDR.
Code Review / csit.git / blobdiff