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trunk
BIG-IP® Reference Guide 7-45
trunk
The trunk command aggregates links (individual physical interfaces) to
form a trunk. This link aggregation increases the bandwidth of the
individual NICs in an additive manner. Thus, four fast Ethernet links, if
aggregated, create a single 400 Mb/s link. The other advantage of link
aggregation is link failover. If one link in a trunk goes down, traffic is
simply redistributed over the remaining links.
A trunk must have a controlling link and acquires all the attributes of that
controlling link from Layer 2 and above. Thus, the trunk automatically
acquires the VLAN membership of the controlling link but does not acquire
its media type and speed. Outbound packets to the controlling link are load
balanced across all of the known-good links in the trunk. Inbound packets
from any link in the trunk are treated as if they came from the controlling
link.
A maximum of eight links may be aggregated. For optimal performance,
links should be aggregated in powers of two. Thus ideally you will
aggregate two, four, or eight links. Gigabit and fast ethernet links cannot be
placed in the same trunk.
For more information on interface naming, refer to Interface naming
conventions, on page 3-2.
b trunk <controlling_if> define <if_list>
b trunk [<controlling_if>] show [verbose]
b trunk [<controlling_if>] stats reset
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