3Com 3C17205-US Implementation Guide - Page 34

not operate in full duplex mode it can still be a member of an

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Page 34 highlights

34 CHAPTER 2: OPTIMIZING BANDWIDTH s When multiple links of different speed connect two devices only the highest speed links will be aggregated. The other links will be held in a standby state until there is a problem with a higher speed link(s). The lower speed link(s) will then become active. s Note that resilient links must be disabled on any port that is to become part of an aggregated link. It is not possible to configure resilient links on a port that is a member of an aggregated link, and vice versa. s A LinkUp / LinkDown trap will only be sent for individual links. The Traps will not be sent for an aggregation. When setting up an aggregated link, note that: s The ports at both ends of a member link must be configured as members of an aggregated link, if you are manually configuring aggregated links. s A member link port can only belong to one aggregated link. s The member link ports can be mixed media, that is fiber and/or twisted pair ports within the same aggregated link. s The member link ports can have different port configurations within the same aggregated link, that is, auto-negotiation, port speed, and duplex mode. However, please note the following: s To be an active participant in an aggregated link the member link ports must operate in full duplex mode. (If a member link port does not operate in full duplex mode it can still be a member of an aggregated link but it will never be activated.) s 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. s Aggregated links and resilient links are mutually exclusive, that is, you cannot have both these features operating on the same ports. s Aggregated links and roving analysis are mutually exclusive, that is, you cannot have both these features operating on the same ports. s Aggregated links and port security are mutually exclusive, that is, you cannot have both these features operating on the same ports. s The port to which the Webcache is connected cannot be a member of an aggregated link.

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34
C
HAPTER
2: O
PTIMIZING
B
ANDWIDTH
■
When multiple links of different speed connect two devices only the
highest speed links will be aggregated. The other links will be held in a
standby state until there is a problem with a higher speed link(s). The
lower speed link(s) will then become active.
■
Note that resilient links must be disabled on any port that is to
become part of an aggregated link. It is not possible to configure
resilient links on a port that is a member of an aggregated link, and
vice versa.
■
A LinkUp / LinkDown trap will only be sent for individual links. The
Traps will not be sent for an aggregation.
When setting up an aggregated link, note that:
■
The ports at both ends of a member link must be configured as
members of an aggregated link, if you are manually configuring
aggregated links.
■
A member link port can only belong to one aggregated link.
■
The member link ports can be mixed media, that is fiber and/or
twisted pair ports within the same aggregated link.
■
The member link ports can have different port configurations within
the same aggregated link, that is, auto-negotiation, port speed, and
duplex mode. However, please note the following:
■
To be an active participant in an aggregated link the member link
ports must operate in full duplex mode. (If a member link port does
not operate in full duplex mode it can still be a member of an
aggregated link but it will never be activated.)
■
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.
■
Aggregated links and resilient links are mutually exclusive, that is, you
cannot have both these features operating on the same ports.
■
Aggregated links and roving analysis are mutually exclusive, that is,
you cannot have both these features operating on the same ports.
■
Aggregated links and port security are mutually exclusive, that is, you
cannot have both these features operating on the same ports.
■
The port to which the Webcache is connected cannot be a member of
an aggregated link.