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Flow Monitoring and Discard Accounting Configuration Guidelines

To configure flow monitoring and accounting properties, include the following statements at the [edit interfaces] hierarchy level:

mo-fpc/pic/port {
unit logical-unit-number {
family inet {
accounting {
destination-class-usage;
source-class-usage direction;
}
}
address address {
destination address;
}
filter {
group filter-group-number;
input filter-name;
output filter-name;
}
receive-options-packets;
receive-ttl-exceeded;
sampling direction;
}
}
multiservice-options {
(core-dump | no-core-dump);
(syslog | no-syslog);
}
(at-fpc/pic/port | fe-fpc/pic/port | ge-fpc/pic/port) {
passive-monitor-mode;
}
so-fpc/pic/port {
unit logical-unit-number {
passive-monitor-mode;
}
}

To configure flow monitoring and accounting properties, include the following statements at the [edit forwarding-options] hierarchy level:

accounting name {
output {
aggregate-export-interval seconds;
cflowd hostname {
aggregation {
autonomous-system;
destination-prefix;
protocol-port;
source-destination-prefix {
caida-compliant;
}
source-prefix;
}
autonomous-system-type (origin | peer);
port port-number;
version format;
}
flow-active-timeout seconds;
flow-inactive-timeout seconds;
interface interface-name {
engine-id number;
engine-type number;
source-address address;
}
}
}
monitoring name {
family inet {
output {
cflowd hostname port port-number;
export-format format;
flow-active-timeout seconds;
flow-export-destination {
collector-pic;
}
flow-inactive-timeout seconds;
interface interface-name {
engine-id number;
engine-type number;
input-interface-index number;
output-interface-index number;
source-address address;
}
}
}
next-hop-group [ group-names ] {
interface interface-name {
next-hop [ addresses ];
}
}
port-mirroring {
input {
family (inet | inet6) {
rate rate;
run-length number;
}
}
output {
interface interface-name {
next-hop address;
}
no-filter-check;
}
traceoptions {
file filename {
files number;
size bytes;
(world-readable | no-world-readable);
}
}
}
sampling {
disable;
input {
family (inet | mpls) {
max-packets-per-second number;
rate number;
run-length number;
}
}
output {
aggregate-export-interval seconds;
cflowd hostname {
aggregation {
autonomous-system;
destination-prefix;
protocol-port;
source-destination-prefix {
caida-compliant;
}
source-prefix;
}
autonomous-system-type (origin | peer);
version9 {
template template-name;
}
(local-dump | no-local-dump);
port port-number;
source-address address;
version format;
}
file {
disable;
filename filename;
files number;
size bytes;
(stamp | no-stamp);
(world-readable | no-world-readable);
}
flow-active-timeout seconds;
flow-inactive-timeout seconds;
interface interface-name {
engine-id number;
engine-type number;
source-address address;
}
}
traceoptions {
file filename {
files number;
size bytes;
(world-readable | no-world-readable);
}
}
}

Note: For the complete [edit forwarding-options] hierarchy, see the JUNOS Policy Framework Configuration Guide. This section documents only the statements used in flow monitoring and accounting services.

To configure cflowd version 9 properties, include the following statements at the [edit services] hierarchy level:

flow-monitoring {
version9 {
template template-name {
flow-active-timeout seconds;
flow-inactive-timeout seconds;
ipv4-template;
mpls-template {
label-position [ positions ];
}
mpls-ipv4-template {
label-position [ positions ];
}
option-refresh-rate packets packets seconds seconds;
template-refresh-rate packets packets seconds seconds;
}
}
}

This chapter describes the following tasks for configuring traffic sampling and flow-monitoring properties:

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