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Aggregated Links
23
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If ports of a different speed are aggregated together, the higher
speed links carry the traffic. The lower speed links only carry the
traffic if the higher speed links fail.
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The aggregated link does not support security.
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Member links must retain the same groupings at both ends of an
aggregated link. For example, the configuration in Figure 2
will not
work as Switch A has one aggregated link defined whose member
links are then split between two aggregated links defined on Switches
B and C.
Figure 2
An illegal aggregated link configuration
When using an aggregated link, note that:
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To gather statistics about an aggregated link, you must add together
the statistics for each port in the aggregated link.
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If you wish to disable a single member link of an aggregated link, you
must first physically remove the connection to ensure that you do not
lose any traffic, before you disable both ends of the member link
separately. If you do this, the traffic destined for that link is distributed
to the other links in the aggregated link.
If you do not remove the connection and only disable one end of the
member link port, traffic is still forwarded to that port by the
aggregated link port at the other end. This means that a significant
amount of traffic may be lost.
■
Before removing all member links from an aggregated link, you must
disable all the aggregated link member ports or disconnect all the
links, except one — if you do not, a loop may be created.
Switch A
Switch C
AL 1
Switch B
AL 2
AL 3