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Flow Monitoring and Discard Accounting Configuration Guidelines

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

[edit interfaces]
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:

[edit forwarding-options]
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 family {
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 address;
}
}
port-mirroring {
input {
rate rate;
run-length number;
}
family (inet | inet6) {
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 | inet6 | 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 flow monitoring that uses cflowd version 9, include the following statements at the [edit services] hierarchy level:

[edit services]
flow-monitoring {
version9 {
template template-name {
flow-active-timeout seconds;
flow-inactive-timeout seconds;
ipv4-template;
ipv6-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 contains the following sections:

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