Rockwell Automation 1783-BMxxx Stratix 5700 Ethernet Managed Switches User Manual - Manual (Page 99)

Rockwell Automation Publication 1783-UM004E-EN-P - June 2014 99
Switch Software Features Chapter 3
Figure 3 - EtherChannel Example
You can configure an EtherChannel in one of these modes:
• Port Aggregation Protocol (PAgP)
• Link Aggregation Control Protocol (LACP)
• On
Configure both ends of the EtherChannel in the same mode:
• When you configure one end of an EtherChannel in either PAgP or LACP
mode, the system negotiates with the other end of the channel to
determine the ports to become active. Incompatible ports are suspended.
Instead of a suspended state, the local port is put into an independent state
and continues to carry data traffic as any other single link. The port
configuration does not change, but the port does not participate in the
EtherChannel.
• When you configure an EtherChannel in the On mode, no negotiations
take place. The switch forces all compatible ports to become active in the
EtherChannel. The other end of the channel (on the other switch) must
also be configured in the On mode; otherwise, packet loss can occur.
If a link within an EtherChannel fails, traffic previously carried over that failed
link moves to the remaining links within the EtherChannel. If traps are enabled
on the switch, a trap is sent for a failure that identifies the switch, the
EtherChannel, and the failed link. Inbound broadcast and multicast packets on
one link in an EtherChannel are blocked from returning on any other link of the
EtherChannel.
Servers
Switch A Switch B
Switch C Switch D
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