D-Link DES-3550 Product Manual - Page 77
Loopback Detection, Recover Time, Configuration
UPC - 790069266317
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xStack® DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual Loopback Detection This feature is used to temporarily shutdown a port on the Switch when a CTP (Configuration Testing Protocol) packet has been looped back to the switch. When the Switch detects CTP packets are received from a port or a VLAN, it signifies a loop on the network. The Switch will automatically block the port or the VLAN and send an alert to the administrator. The Loopback Detection port will restart (change to discarding state) when the Loopback Detection Recover Time times out. The Loopback Detection function can be implemented on a range of ports at a time. The user may enable or disable this function using the pulldown menu. To view this window click, Configuration > Loopback Detection. Figure 6- 35 Loopback Detection Global Settings window 62
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