Configuration Reference

Below is the list of some section names and their associated parameters. This is not an exhaustive list, but should give you an idea of how VPP can be configured.

For all of the configuration parameters search the source code for instances of VLIB_CONFIG_FUNCTION and VLIB_EARLY_CONFIG_FUNCTION.

For example, the invocation 'VLIB_CONFIG_FUNCTION (foo_config, "foo")' will cause the function 'foo_config' to receive all parameters given in a parameter block named "foo": "foo { arg1 arg2 arg3 ... }".

The unix section

Configures VPP startup and behavior type attributes, as well and any OS based attributes.

unix {
  nodaemon
  log /var/log/vpp/vpp.log
  full-coredump
  cli-listen /run/vpp/cli.sock
  gid vpp
}

nodaemon

Do not fork / background the vpp process. Typical when invoking VPP applications from a process monitor. Set by default in the default 'startup.conf' file.

nodaemon

nosyslog

Disable syslog and log errors to stderr instead. Typical when invoking VPP applications from a process monitor like runit or daemontools that pipe service's output to a dedicated log service, which will typically attach a timestamp and rotate the logs as necessary.

nosyslog

interactive

Attach CLI to stdin/out and provide a debugging command line interface.

interactive

log <filename>

Logs the startup configuration and all subsequent CLI commands in filename. Very useful in situations where folks don't remember or can't be bothered to include CLI commands in bug reports. The default 'startup.conf' file is to write to '/var/log/vpp/vpp.log'.

In VPP 18.04, the default log file location was moved from '/tmp/vpp.log' to '/var/log/vpp/vpp.log' . The VPP code is indifferent to the file location. However, if SELinux is enabled, then the new location is required for the file to be properly labeled. Check your local 'startup.conf' file for the log file location on your system.

log /var/log/vpp/vpp-debug.log

exec | startup-config <filename>

Read startup operational configuration from filename. The contents of the file will be performed as though entered at the CLI. The two keywords are aliases for the same function; if both are specified, only the last will have an effect.

A file of CLI commands might look like:

$ cat /usr/share/vpp/scripts/interface-up.txt
set interface state TenGigabitEthernet1/0/0 up
set interface state TenGigabitEthernet1/0/1 up

Parameter Example:

startup-config /usr/share/vpp/scripts/interface-up.txt

gid <number | name>

Sets the effective group ID to the input group ID or group name of the calling process.

gid vpp

full-coredump

Ask the Linux kernel to dump all memory-mapped address regions, instead of just text+data+bss.

full-coredump

coredump-size unlimited | <n>G | <n>M | <n>K | <n>

Set the maximum size of the coredump file. The input value can be set in GB, MB, KB or bytes, or set to 'unlimited'.

coredump-size unlimited

cli-listen <ipaddress:port> | <socket-path>

Bind the CLI to listen at address localhost on TCP port 5002. This will accept an ipaddress:port pair or a filesystem path; in the latter case a local Unix socket is opened instead. The default 'startup.conf' file is to open the socket '/run/vpp/cli.sock'.

cli-listen localhost:5002
cli-listen /run/vpp/cli.sock

cli-line-mode

Disable character-by-character I/O on stdin. Useful when combined with, for example, emacs M-x gud-gdb.

cli-line-mode

cli-prompt <string>

Configure the CLI prompt to be string.

cli-prompt vpp-2

cli-history-limit <n>

Limit command history to <n> lines. A value of 0 disables command history. Default value: 50

cli-history-limit 100

runtime-dir <dir>

Set the runtime directory, which is the default location for certain files, like socket files. Default is based on User ID used to start VPP. Typically it is 'root', which defaults to '/run/vpp/'. Otherwise, defaults to '/run/user/<uid>/vpp/'.

runtime-dir /tmp/vpp

poll-sleep-usec <n>

Add a fixed-sleep between main loop poll. Default is 0, which is not to sleep.

poll-sleep-usec 100

pidfile <filename>

Writes the pid of the main thread in the given filename.

pidfile /run/vpp/vpp1.pid

The api-trace Section

The ability to trace, dump, and replay control-plane API traces makes all the difference in the world when trying to understand what the control-plane has tried to ask the forwarding-plane to do.

Typically, one simply enables the API message trace scheme:

api-trace {
  api-trace on
}

on | enable

Enable API trace capture from the beginning of time, and arrange for a post-mortem dump of the API trace if the application terminates abnormally. By default, the (circular) trace buffer will be configured to capture 256K traces. The default 'startup.conf' file has trace enabled by default, and unless there is a very strong reason, it should remain enabled.

on

nitems <n>

Configure the circular trace buffer to contain the last <n> entries. By default, the trace buffer captures the last 256K API messages received.

nitems 524288

save-api-table <filename>

Dumps the API message table to /tmp/<filename>.

save-api-table apiTrace-07-04.txt

The api-segment Section

These values control various aspects of the binary API interface to VPP.

The default looks like the following:

api-segment {
  gid vpp
}

prefix <path>

Sets the prefix prepended to the name used for shared memory (SHM) segments. The default is empty, meaning shared memory segments are created directly in the SHM directory '/dev/shm'. It is worth noting that on many systems '/dev/shm' is a symbolic link to somewhere else in the file system; Ubuntu links it to '/run/shm'.

prefix /run/shm

uid <number | name>

Sets the user ID or name that should be used to set the ownership of the shared memory segments. Defaults to the same user that VPP is started with, probably root.

uid root

gid <number | name>

Sets the group ID or name that should be used to set the ownership of the shared memory segments. Defaults to the same group that VPP is started with, probably root.

gid vpp

The following parameters should only be set by those that are familiar with the interworkings of VPP.

baseva <x>

Set the base address for SVM global region. If not set, on AArch64, the code will try to determine the base address. All other default to 0x30000000.

baseva 0x20000000

global-size <n>G | <n>M | <n>

Set the global memory size, memory shared across all router instances, packet buffers, etc. If not set, defaults to 64M. The input value can be set in GB, MB or bytes.

global-size 2G

global-pvt-heap-size <n>M | size <n>

Set the size of the global VM private mheap. If not set, defaults to 128k. The input value can be set in MB or bytes.

global-pvt-heap-size size 262144

api-pvt-heap-size <n>M | size <n>

Set the size of the api private mheap. If not set, defaults to 128k. The input value can be set in MB or bytes.

api-pvt-heap-size 1M

api-size <n>M | <n>G | <n>

Set the size of the API region. If not set, defaults to 16M. The input value can be set in GB, MB or bytes.

api-size 64M

The socksvr Section

Enables a Unix domain socket which processes binary API messages. See .../vlibmemory/socket_api.c. If this parameter is not set, vpp won't process binary API messages over sockets.

socksvr {
   # Explicitly name a socket file
   socket-name /run/vpp/api.sock
   or
   # Use defaults as described below
   default
}

The "default" keyword instructs vpp to use /run/vpp/api.sock when running as root, otherwise to use /run/user/<uid>/api.sock.

The cpu Section

In the VPP there is one main thread and optionally the user can create worker(s) The main thread and worker thread(s) can be pinned to CPU core(s) manually or automatically

cpu {
   main-core 1
   corelist-workers 2-3,18-19
}

Manual pinning of thread(s) to CPU core(s)

main-core

Set logical CPU core where main thread runs, if main core is not set VPP will use core 1 if available

main-core 1

corelist-workers

Set logical CPU core(s) where worker threads are running

corelist-workers 2-3,18-19

Automatic pinning of thread(s) to CPU core(s)

skip-cores number

Sets number of CPU core(s) to be skipped (1 ... N-1), Skipped CPU core(s) are not used for pinning main thread and working thread(s).

The main thread is automatically pinned to the first available CPU core and worker(s) are pinned to next free CPU core(s) after core assigned to main thread

skip-cores 4

workers number

Specify a number of workers to be created Workers are pinned to N consecutive CPU cores while skipping "skip-cores" CPU core(s) and main thread's CPU core

workers 2

scheduler-policy other | batch | idle | fifo | rr

Set scheduling policy and priority of main and worker threads

Scheduling policy options are: other (SCHED_OTHER), batch (SCHED_BATCH) idle (SCHED_IDLE), fifo (SCHED_FIFO), rr (SCHED_RR)

scheduler-policy fifo

scheduler-priority number

Scheduling priority is used only for "real-time policies (fifo and rr), and has to be in the range of priorities supported for a particular policy

scheduler-priority 50

The buffers Section

buffers {
   buffers-per-numa 128000
   default data-size 2048
   page-size default-hugepage
}

buffers-per-numa number

Increase number of buffers allocated, needed only in scenarios with large number of interfaces and worker threads. Value is per numa node. Default is 16384 (8192 if running unprivileged)

buffers-per-numa 128000

default data-size number

Size of buffer data area, default is 2048

default data-size 2048

page-size number

Set the page size for buffer allocation

page-size 4K
page-size 2M
page-size 1G
page-size default
page-size default-hugepage

The dpdk Section

dpdk {
   dev default {
      num-rx-desc 512
      num-tx-desc 512
   }

   dev 0000:02:00.1 {
      num-rx-queues 2
      name eth0
   }
}

dev <pci-dev> | default { .. }

White-list [as in, attempt to drive] a specific PCI device. PCI-dev is a string of the form "DDDD:BB:SS.F" where:

DDDD = Domain
BB = Bus Number
SS = Slot number
F = Function

If the keyword default is used the values will apply to all the devices.

This is the same format used in the linux sysfs tree (i.e./sys/bus/pci/devices) for PCI device directory names.

dpdk {
   dev default {
      num-rx-desc 512
      num-tx-desc 512
   }

dev <pci-dev> { .. }

Whitelist specific interface by specifying PCI address. When whitelisting specific interfaces by specifying PCI address, additional custom parameters can also be specified. Valid options include:

dev 0000:02:00.0
dev 0000:03:00.0

blacklist <pci-dev>

Blacklist specific device type by specifying PCI vendor:device Whitelist entries take precedence

blacklist 8086:10fb

name interface-name

Set interface name

dev 0000:02:00.1 {
   name eth0
}

num-rx-queues <n>

Number of receive queues. Also enables RSS. Default value is 1.

dev 0000:02:00.1 {
   num-rx-queues <n>
}

num-tx-queues <n>

Number of transmit queues. Default is equal to number of worker threads or 1 if no workers treads.

dev 000:02:00.1 {
   num-tx-queues <n>
}

num-rx-desc <n>

Number of descriptors in receive ring. Increasing or reducing number can impact performance. Default is 1024.

dev 000:02:00.1 {
   num-rx-desc <n>
}

uio-driver driver-name

Change UIO driver used by VPP, Options are: igb_uio, vfio-pci, uio_pci_generic or auto (default)

uio-driver vfio-pci

uio-bind-force

Force VPP to rebind the interface(s) to the selected UIO driver, even if the interface is up in Linux. By default, VPP will refuse to bind an interface if it is up in Linux, in case it is in active use.

uio-bind-force

no-multi-seg

Disable multi-segment buffers, improves performance but disables Jumbo MTU support

no-multi-seg

socket-mem <n>

Change hugepages allocation per-socket, needed only if there is need for larger number of mbufs. Default is 256M on each detected CPU socket

socket-mem 2048,2048

no-tx-checksum-offload

Disables UDP / TCP TX checksum offload. Typically needed for use faster vector PMDs (together with no-multi-seg)

no-tx-checksum-offload

enable-tcp-udp-checksum

Enable UDP / TCP TX checksum offload This is the reversed option of 'no-tx-checksum-offload'

enable-tcp-udp-checksum

The plugins Section

Configure VPP plugins.

plugins {
   path /ws/vpp/build-root/install-vpp-native/vpp/lib/vpp_plugins
   plugin dpdk_plugin.so enable
}

path pathname

Adjust the plugin path depending on where the VPP plugins are.

path /ws/vpp/build-root/install-vpp-native/vpp/lib/vpp_plugins

plugin plugin-name | default enable | disable

Disable all plugins by default and then selectively enable specific plugins

plugin default disable
plugin dpdk_plugin.so enable
plugin acl_plugin.so enable

Enable all plugins by default and then selectively disable specific plugins

plugin dpdk_plugin.so disable
plugin acl_plugin.so disable

Th statseg Section

statseg {
   per-node-counters on
 }

socket-name <filename>

Name of the stats segment socket defaults to /run/vpp/stats.sock.

socket-name /run/vpp/stats.sock

size <nnn>[KMG]

The size of the stats segment, defaults to 32mb

size 1024M

per-node-counters on | off

Defaults to none

per-node-counters on

update-interval <f64-seconds>

Sets the segment scrape / update interval

update-interval 300

Some Advanced Parameters:

acl-plugin Section

These parameters change the configuration of the ACL (access control list) plugin, such as how the ACL bi-hash tables are initialized.

They should only be set by those that are familiar with the interworkings of VPP and the ACL Plugin.

The first three parameters, connection hash buckets, connection hash memory, and connection count max, set the connection table per-interface parameters for modifying how the two bounded-index extensible hash tables for IPv6 (40*8 bit key and 8*8 bit value pairs) and IPv4 (16*8 bit key and 8*8 bit value pairs) ACL plugin FA interface sessions are initialized.

connection hash buckets <n>

Sets the number of hash buckets (rounded up to a power of 2) in each of the two bi-hash tables. Defaults to 64*1024 (65536) hash buckets.

connection hash buckets 65536

connection hash memory <n>

Sets the allocated memory size (in bytes) for each of the two bi-hash tables. Defaults to 1073741824 bytes.

connection hash memory 1073741824

connection count max <n>

Sets the maximum number of pool elements when allocating each per-worker pool of sessions for both bi-hash tables. Defaults to 500000 elements in each pool.

connection count max 500000

main heap size <n>G | <n>M | <n>K | <n>

Sets the size of the main memory heap that holds all the ACL module related allocations (other than hash.) Default size is 0, but during ACL heap initialization is equal to per_worker_size_with_slack * tm->n_vlib_mains + bihash_size + main_slack. Note that these variables are partially based on the connection table per-interface parameters mentioned above.

main heap size 3G

The next three parameters, hash lookup heap size, hash lookup hash buckets, and hash lookup hash memory, modify the initialization of the bi-hash lookup table used by the ACL plugin. This table is initialized when attempting to apply an ACL to the existing vector of ACLs looked up during packet processing (but it is found that the table does not exist / has not been initialized yet.)

hash lookup heap size <n>G | <n>M | <n> K | <n>

Sets the size of the memory heap that holds all the miscellaneous allocations related to hash-based lookups. Default size is 67108864 bytes.

hash lookup heap size 70M

hash lookup hash buckets <n>

Sets the number of hash buckets (rounded up to a power of 2) in the bi-hash lookup table. Defaults to 65536 hash buckets.

hash lookup hash buckets 65536

hash lookup hash memory <n>

Sets the allocated memory size (in bytes) for the bi-hash lookup table. Defaults to 67108864 bytes.

hash lookup hash memory 67108864

use tuple merge <n>

Sets a boolean value indicating whether or not to use TupleMerge for hash ACL's. Defaults to 1 (true), meaning the default implementation of hashing ACL's does use TupleMerge.

use tuple merge 1

tuple merge split threshold <n>

Sets the maximum amount of rules (ACE's) that can collide in a bi-hash lookup table before the table is split into two new tables. Splitting ensures less rule collisions by hashing colliding rules based on their common tuple (usually their maximum common tuple.) Splitting occurs when the length of the colliding rules vector is greater than this threshold amount. Defaults to a maximum of 39 rule collisions per table.

tuple merge split threshold 30

reclassify sessions <n>

Sets a boolean value indicating whether or not to take the epoch of the session into account when dealing with re-applying ACL's or changing already applied ACL's. Defaults to 0 (false), meaning the default implementation does NOT take the epoch of the session into account.

reclassify sessions 1

api-queue Section

length <n>

Sets the api queue length. Minimum valid queue length is 1024, which is also the default.

length 2048

cj Section

The circular journal (CJ) thread-safe circular log buffer scheme is occasionally useful when chasing bugs. Calls to it should not be checked in. See .../vlib/vlib/unix/cj.c. The circular journal is disables by default. When enabled, the number of records must be provided, there is no default value.

records <n>

Configure the number of circular journal records in the circular buffer. The number of records should be a power of 2.

records 131072

on

Turns on logging at the earliest possible moment.

on

dns Section

max-cache-size <n>

Set the maximum number of active elements allowed in the pool of dns cache entries. When resolving an expired entry or adding a new static entry and the max number of active entries is reached, a random, non-static entry is deleted. Defaults to 65535 entries.

max-cache-size 65535

ethernet Section

default-mtu <n>

Specifies the default MTU size for Ethernet interfaces. Must be in the range of 64-9000. The default is 9000.

default-mtu 1500

heapsize Section

Heapsize configuration controls the size of the main heap. The heap size is configured very early in the boot sequence, before loading plug-ins or doing much of anything else.

heapsize <n>M | <n>G

Specifies the size of the heap in MB or GB. The default is 1GB.

heapsize 2G

ip Section

IPv4 heap configuration. he heap size is configured very early in the boot sequence, before loading plug-ins or doing much of anything else.

heap-size <n>G | <n>M | <n>K | <n>

Set the IPv4 mtrie heap size, which is the amount of memory dedicated to the destination IP lookup table. The input value can be set in GB, MB, KB or bytes. The default value is 32MB.

heap-size 64M

ip6 Section

IPv6 heap configuration. he heap size is configured very early in the boot sequence, before loading plug-ins or doing much of anything else.

heap-size <n>G | <n>M | <n>K | <n>

Set the IPv6 forwarding table heap size. The input value can be set in GB, MB, KB or bytes. The default value is 32MB.

heap-size 64M

hash-buckets <n>

Set the number of IPv6 forwarding table hash buckets. The default value is 64K (65536).

hash-buckets 131072

l2learn Section

Configure Layer 2 MAC Address learning parameters.

limit <n>

Configures the number of L2 (MAC) addresses in the L2 FIB at any one time, which limits the size of the L2 FIB to <n> concurrent entries. Defaults to 4M entries (4194304).

limit 8388608

l2tp Section

IPv6 Layer 2 Tunnelling Protocol Version 3 (IPv6-L2TPv3) configuration controls the method used to locate a specific IPv6-L2TPv3 tunnel. The following settings are mutually exclusive:

lookup-v6-src

Lookup tunnel by IPv6 source address.

lookup-v6-src

lookup-v6-dst

Lookup tunnel by IPv6 destination address.

lookup-v6-dst

lookup-session-id

Lookup tunnel by L2TPv3 session identifier.

lookup-session-id

logging Section

size <n>

Number of entries in the global logging buffer. Defaults to 512.

size 512

nthrottle-time <n>

Set the global value for the time to wait (in seconds) before resuming logging of a log subclass that exceeded the per-subclass message-per-second threshold. Defaults to 3.

unthrottle-time 3

default-log-level emerg|alert | crit | err | warn | notice | info | debug | disabled

Set the default logging level of the system log. Defaults to notice.

default-log-level notice

default-syslog-log-level emerg|alert | crit | err | warn | notice | info | debug | disabled

Set the default logging level of the syslog target. Defaults to warning.

default-syslog-log-level warning

mactime Section

lookup-table-buckets <n>

Sets the number of hash buckets in the mactime bi-hash lookup table. Defaults to 128 buckets.

lookup-table-buckets 128

lookup-table-memory <n>G | <n>M | <n>K | <n>

Sets the allocated memory size (in bytes) for the mactime bi-hash lookup table. The input value can be set in GB, MB, KB or bytes. The default value is 262144 (256 << 10) bytes or roughly 256KB.

lookup-table-memory 300K

timezone_offset <n>

Sets the timezone offset from UTC. Defaults to an offset of -5 hours from UTC (US EST / EDT.)

timezone_offset -5

"map" Parameters

customer edge

Sets a boolean true to indicate that the MAP node is a Customer Edge (CE) router. The boolean defaults to false, meaning the MAP node is not treated as a CE router.

customer edge

nat Section

These parameters change the configuration of the NAT (Network address translation) plugin, such as how the NAT & NAT64 bi-hash tables are initialized, if the NAT is endpoint dependent, or if the NAT is deterministic.

For each NAT per thread data, the following 4 parameters change how certain bi-hash tables are initialized.

translation hash buckets <n>

Sets the number of hash buckets in each of the two in/out NAT bi-hash lookup tables. Defaults to 1024 buckets.

If the NAT is indicated to be endpoint dependent, which can be set with the endpoint-dependent parameter, then this parameter sets the number of hash buckets in each of the two endpoint dependent sessions NAT bi-hash lookup tables.

translation hash buckets 1024

translation hash memory <n>

Sets the allocated memory size (in bytes) for each of the two in/out NAT bi-hash tables. Defaults to 134217728 (128 << 20) bytes, which is roughly 128 MB.

If the NAT is indicated to be endpoint dependent, which can be set with the endpoint-dependent parameter, then this parameter sets the allocated memory size for each of the two endpoint dependent sessions NAT bi-hash lookup tables.

translation hash memory 134217728

user hash buckets <n>

Sets the number of hash buckets in the user bi-hash lookup table (src address lookup for a user.) Defaults to 128 buckets.

user hash buckets 128

user hash memory <n>

Sets the allocated memory size (in bytes) for the user bi-hash lookup table (src address lookup for a user.) Defaults to 67108864 (64 << 20) bytes, which is roughly 64 MB.

user hash memory 67108864

max translations per user <n>

Sets the maximum amount of dynamic and/or static NAT sessions each user can have. Defaults to 100. When this limit is reached, the least recently used translation is recycled.

max translations per user 50

deterministic

Sets a boolean value to 1 indicating that the NAT is deterministic. Defaults to 0, meaning the NAT is not deterministic.

deterministic

nat64 bib hash buckets <n>

Sets the number of hash buckets in each of the two in/out NAT64 BIB bi-hash tables. Defaults to 1024 buckets.

nat64 bib hash buckets 1024

nat64 bib hash memory <n>

Sets the allocated memory size (in bytes) for each of the two in/out NAT64 BIB bi-hash tables. Defaults to 134217728 (128 << 20) bytes, which is roughly 128 MB.

nat64 bib hash memory 134217728

nat64 st hash buckets <n>

Sets the number of hash buckets in each of the two in/out NAT64 session table bi-hash tables. Defaults to 2048 buckets.

nat64 st hash buckets 2048

nat64 st hash memory <n>

Sets the allocated memory size (in bytes) for each of the two in/out NAT64 session table bi-hash tables. Defaults to 268435456 (256 << 20) bytes, which is roughly 256 MB.

nat64 st hash memory 268435456

endpoint-dependent

Sets a boolean value to 1, indicating that the NAT is endpoint dependent. Defaults to 0, meaning the NAT is not endpoint dependent.

endpoint-dependent

oam Section

OAM configuration controls the (ip4-icmp) interval, and number of misses allowed before reporting an oam target down to any registered listener.

interval <n.n>

Interval, floating-point seconds, between sending OAM IPv4 ICMP messages. Default is 2.04 seconds.

interval 3.5

physmem Section

Configuration parameters used to specify base address and maximum size of the memory allocated for the pmalloc module in VPP. pmalloc is a NUMA-aware, growable physical memory allocator. pmalloc allocates memory for the DPDK memory pool.

base-addr <address>

Specify the base address for pmalloc memory space.

base-addr 0xfffe00000000

max-size <n>G | <n>M | <n>K | <n>

Set the memory size for pmalloc memory space. The default is 16G.

max-size 4G

tapcli Section

Configuration parameters for TAPCLI (dynamic tap interface hookup.)

mtu <n>

Sets interface MTU (maximum transmission unit) size in bytes. This size is also related to the number of MTU buffers. Defaults to 1500 bytes.

mtu 1500

disable

Disables TAPCLI. Default is that TAPCLI is enabled.

disable

tcp Section

Configuration parameters for TCP host stack utilities. The following preallocation parameters are related to the initialization of fixed-size, preallocation pools.

preallocated-connections <n>

Sets the number of preallocated TCP connections. Defaults to 0. The preallocated connections per thread is related to this value, equal to (preallocated_connections / (num_threads - 1)).

preallocated-connections 5

preallocated-half-open-connections <n>

Sets the number of preallocated TCP half-open connections. Defaults to 0.

preallocated-half-open-connections 5

buffer-fail-fraction <n.n>

Sets the TCP buffer fail fraction (a float) used for fault-injection when debugging TCP buffer allocation. Its use is found in tcp_debug.h. Defaults to 0.0.

buffer-fail-fraction 0.0

tls Section

Configures TLS parameters, such as enabling the use of test certificates. These parameters affect the tlsmbedtls and tlsopenssl plugins.

use-test-cert-in-ca

Sets a boolean value to 1 to indicate during the initialization of a TLS CA chain to attempt to parse and add test certificates to the chain. Defaults to 0, meaning test certificates are not used.

use-test-cert-in-ca

ca-cert-path <filename>

Sets the filename path of the location of TLS CA certificates, used when initializing and loading TLS CA certificates during the initialization of a TLS CA chain. If not set, the default filename path is /etc/ssl/certs/ca-certificates.crt.

ca-cert-path /etc/ssl/certs/ca-certificates.crt

tuntap Section

The "tuntap" driver configures a point-to-point interface between the vpp engine and the local Linux kernel stack. This allows e.g. users to ssh to the host | VM | container via vpp "revenue" interfaces. It's marginally useful, and is currently disabled by default. To [dynamically] create TAP interfaces - the preferred scheme - see the "tap_connect" binary API. The Linux network stack "vnet" interface needs to manually configure, and VLAN and other settings if desired.

enable|disable

Enable or disable the tun/tap driver.

enable

ethernet|ether

Create a tap device (ethernet MAC) instead of a tun device (point-to-point tunnel). The two keywords are aliases for the same function.

ethernet

have-normal-interface|have-normal

Treat the host Linux stack as a routing peer instead of programming VPP interface L3 addresses onto the tun/tap devices. The two keywords are aliases for the same function.

have-normal-interface

name <name>

Assign name to the tun/tap device.

name vpp1

vhost-user Section

Vhost-user configuration parameters control the vhost-user driver.

coalesce-frames <n>

Subject to deadline-timer expiration - see next item - attempt to transmit at least <n> packet frames. Default is 32 frames.

coalesce-frames 64

coalesce-time <seconds>

Hold packets no longer than (floating-point) seconds before transmitting them. Default is 0.001 seconds

coalesce-time 0.002

dont-dump-memory

vhost-user shared-memory segments can add up to a large amount of memory, so it's handy to avoid adding them to corefiles when using a significant number of such interfaces.

dont-dump-memory

vlib Section

These parameters configure VLIB, such as allowing you to choose whether to enable memory traceback or a post-mortem elog dump.

memory-trace

Enables memory trace (mheap traceback.) Defaults to 0, meaning memory trace is disabled.

memory-trace

elog-events <n>

Sets the number of elements/events (the size) of the event ring (a circular buffer of events.) This number rounds to a power of 2. Defaults to 131072 (128 << 10) elements.

elog-events 4096

elog-post-mortem-dump

Enables the attempt of a post-mortem elog dump to /tmp/elog_post_mortem.<PID_OF_CALLING_PROCESS> if os_panic or os_exit is called.

elog-post-mortem-dump

Configuration Reference

The unix section

nodaemon

nosyslog

interactive

log <filename>

exec | startup-config <filename>

gid <number | name>

full-coredump

coredump-size unlimited | <n>G | <n>M | <n>K | <n>

cli-listen <ipaddress:port> | <socket-path>

cli-line-mode

cli-prompt <string>

cli-history-limit <n>

cli-no-banner

cli-no-pager

cli-pager-buffer-limit <n>

runtime-dir <dir>

poll-sleep-usec <n>

pidfile <filename>

The api-trace Section

on | enable

nitems <n>

save-api-table <filename>

The api-segment Section

prefix <path>

uid <number | name>

gid <number | name>

baseva <x>

global-size <n>G | <n>M | <n>

global-pvt-heap-size <n>M | size <n>

api-pvt-heap-size <n>M | size <n>

api-size <n>M | <n>G | <n>

The socksvr Section

The cpu Section

Manual pinning of thread(s) to CPU core(s)

main-core

corelist-workers

Automatic pinning of thread(s) to CPU core(s)

skip-cores number

workers number

scheduler-policy other | batch | idle | fifo | rr

scheduler-priority number

The buffers Section

buffers-per-numa number

default data-size number

page-size number

The dpdk Section

dev <pci-dev> | default { .. }

dev <pci-dev> { .. }

blacklist <pci-dev>

name interface-name

num-rx-queues <n>

num-tx-queues <n>

num-rx-desc <n>

uio-driver driver-name

uio-bind-force

no-multi-seg

socket-mem <n>

no-tx-checksum-offload

enable-tcp-udp-checksum

The plugins Section

path pathname

plugin plugin-name | default enable | disable

Th statseg Section

socket-name <filename>

size <nnn>[KMG]

per-node-counters on | off

update-interval <f64-seconds>

Some Advanced Parameters:

acl-plugin Section

connection hash buckets <n>

connection hash memory <n>

connection count max <n>

main heap size <n>G | <n>M | <n>K | <n>

hash lookup heap size <n>G | <n>M | <n> K | <n>

hash lookup hash buckets <n>

hash lookup hash memory <n>

use tuple merge <n>

tuple merge split threshold <n>