3Com 3C17300A Implementation Guide - Page 31

Traffic Distribution and Link Failure on Aggregated Links

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Aggregated Links 31 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. Traffic Distribution and Link Failure on Aggregated Links To maximize throughput, all traffic is distributed across the individual links that make up an aggregated link. Therefore, when a packet is made available for transmission down an aggregated link, a hardware-based traffic distribution mechanism determines which particular port in the link should be used; this mechanism uses the MAC address. The traffic is distributed among the member links as efficiently as possible. To avoid the potential problem of out-of-sequence packets (or "packet re-ordering"), the Switch ensures that all the conversations between a given pair of endstations will pass through the same port in the aggregated link. Single-to-multiple endstation conversations, on the other hand, may still take place over different ports. If the link state on any of the ports in an aggregated link becomes inactive due to link failure, then the Switch will automatically redirect the aggregated link traffic to the remaining ports. Aggregated links therefore provide built-in resilience for your network.

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Aggregated Links
31
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.
Traffic Distribution and Link Failure on Aggregated Links
To maximize throughput, all traffic is distributed across the individual links
that make up an aggregated link. Therefore, when a packet is made
available for transmission down an aggregated link, a hardware-based
traffic distribution mechanism determines which particular port in the link
should be used; this mechanism uses the MAC address. The traffic is
distributed among the member links as efficiently as possible.
To avoid the potential problem of out-of-sequence packets (or "packet
re-ordering"), the Switch ensures that all the conversations between a
given pair of endstations will pass through the same port in the
aggregated link. Single-to-multiple endstation conversations, on the
other hand, may still take place over different ports.
If the link state on any of the ports in an aggregated link becomes
inactive due to link failure, then the Switch will automatically redirect the
aggregated link traffic to the remaining ports. Aggregated links therefore
provide built-in resilience for your network.