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JUNOS 10.1 Network Interfaces Configuration Guide
Enabling LACP Link Protection
To enable LACP link protection for an aggregated Ethernet interfaces, use the
link-protection
hierarchy level:
By default, LACP link protection reverts to a higher-priority (lower-numbered) link
when that higher-priority link becomes operational or a link is added to the aggregator
that is determined to be higher in priority. However, you can suppress link calculation
by adding the
nonrevertive mode, once a link is active and collecting and distributing packets, the
subsequent addition of a higher-priority (better) link does not result in a switch and
the current link remains active.
If LACP link protection is configured to be nonrevertive at the global (
hierarchy) level, you can add the
configuration to override the nonrevertive setting for the interface. In revertive mode,
the addition of a higher-priority link to the aggregator results in LACP performing a
priority recalculation and switching from the current active link to the new active
link.
CAUTION: If both ends of an aggregator have LACP link protection enabled, make
sure to configure both ends of the aggregator to use the same mode. Mismatching
LACP link protection modes can result in lost traffic.
Configuring LACP System Priority
To configure LACP system priority for aggregated Ethernet interfaces on the interface,
use the
lacp]
The system priority is a 2-octet binary value that is part of the LACP system ID. The
LACP system ID consists of the system priority as the two most-significant octets
and the interface MAC address as the six least-significant octets. The system with
the numerically lower value for system priority has the higher priority. By default,
system priority is 127, with a range of 0 to 65,535.
652
Configuring Aggregated Ethernet LACP
statement at the [
[edit interfaces aeX aggregated-ether-options lacp]
link-protection;
disable;
revertive;
non-revertive;
}
non-revertive
statement to the LACP link protection configuration. In
system-priority
statement at the
hierarchy level:
[edit interfaces aeX aggregated-ether-options lacp]
system-priority;
edit interfaces aeX aggregated-ether-options lacp]
statement to the LACP link protection
revertive
[edit interfaces aeX aggregated-ether-options
[edit chassis]
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