diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/development/design/ndrpdr.rst | 5 | ||||
| -rw-r--r-- | docs/testing/user/userguide/faq.rst | 19 |
2 files changed, 22 insertions, 2 deletions
diff --git a/docs/development/design/ndrpdr.rst b/docs/development/design/ndrpdr.rst index f748476..4f611a0 100644 --- a/docs/development/design/ndrpdr.rst +++ b/docs/development/design/ndrpdr.rst @@ -23,7 +23,12 @@ Call chain for calculating the NDR-PDR for a list of frame sizes: The search range is delimited by a left and right rate (expressed as a % of line rate per direction). +The load_epsilon configuration parameter defines the accuracy of the result as a % of line rate. +The default value of 0.1 indicates for example that the measured NDR and PDR are within 0.1% of line rate of the +actual NDR/PDR (e.g. 0.1% of 10Gbps is 10Mbps). It also determines how small the search range must be in the binary search. + The recursion narrows down the range by half and stops when: - the range is smaller than the configured load_epsilon value - or when the search hits 100% or 0% of line rate + diff --git a/docs/testing/user/userguide/faq.rst b/docs/testing/user/userguide/faq.rst index cb5acb5..f5ff6b3 100644 --- a/docs/testing/user/userguide/faq.rst +++ b/docs/testing/user/userguide/faq.rst @@ -5,6 +5,8 @@ Frequently Asked Questions ************************** +General Questions +================= Can NFVbench be used with a different traffic generator than TRex? ------------------------------------------------------------------ @@ -14,15 +16,28 @@ Can I connect Trex directly to my compute node? ----------------------------------------------- That is possible but you will not be able to run more advanced use cases such as PVVP inter-node which requires 2 compute nodes. - Can I drive NFVbench using a REST interface? -------------------------------------------- NFVbench can run in server mode and accept HTTP or WebSocket/SocketIO events to run any type of measurement (fixed rate run or NDR_PDR run) with any run configuration. - Can I run NFVbench on a Cisco UCS-B series blade? ------------------------------------------------- Yes provided your UCS-B series server has a Cisco VIC 1340 (with a recent firmware version). TRex will require VIC firmware version 3.1(2) or higher for blade servers (which supports more filtering capabilities). In this setting, the 2 physical interfaces for data plane traffic are simply hooked to the UCS-B fabric interconnect (no need to connect to a switch). + +Troubleshooting +=============== + +TrafficClientException: End-to-end connectivity cannot be ensured +------------------------------------------------------------------ +Prior to running a benchmark, NFVbench will make sure that traffic is passing in the service chain by sending a small flow of packets in each direction and verifying that they are received back at the other end. +This exception means that NFVbench cannot pass any traffic in the service chain. + +The most common issues that prevent traffic from passing are: +- incorrect wiring of the NFVbench/TRex interfaces +- incorrect vlan_tagging setting in the NFVbench configuration, this needs to match how the NFVbench ports on the switch are configured (trunk or access port) + - if the switch port is configured as access port, you must disable vlan_tagging in the NFVbench configuration + - of the switch port is configured as trunk (recommended method), you must enable it + |