Switch managed/unmanaged?

[wiff]

Was ist der Unterschied zw einem unmanaged(=nicht kaskadierbar?) und einm kaskadierbaren Switch, außer der Preis. Und was kann ein Switch mit einem Uplink-Port?
wiff

[jak]

Managed or Unmanaged
Management provides benefits in many networks. Large networks with mission critical applications are managed with many sophisticated tools, using SNMP to monitor the health of devices on the network. Networks using SNMP or RMON (an extension to SNMP that provides much more data while using less network bandwidth to do so) will either manage every device, or just the more critical areas. VLANs are another benefit to management in a switch. A VLAN allows the network to group nodes into logical LANs that behave as one network, regardless of physical connections. The main benefit is managing broadcast and multicast traffic. An unmanaged switch will pass broadcast and multicast packets through to all ports. If the network has logical grouping that are different from physical groupings then a VLAN-based switch may be the best bet for traffic optimization. Another benefit to management in the switches is Spanning Tree Algorithm. Spanning Tree allows the network manager to design in redundant links, with switches attached in loops. This would defeat the self learning aspect of switches, since traffic from one node would appear to originate on different ports. Spanning Tree is a protocol that allows the switches to coordinate with each other so that traffic is only carried on one of the redundant links (unless there is a failure, then the backup link is automatically activated). Network managers with switches deployed in critical applications may want to have redundant links. In this case management is necessary. But for the rest of the networks an unmanaged switch would do quite well, and is much less expensive.

Quelle:
http://www.lantronix.com/learning/tu...switching.html

Der uplink Port dient dazu hubs anzuschließen. Wenn ich mich nicht irre ist er gekreuzt d.h. man kann ein normales Kabel verwenden (man braucht kein gekreuztes).

Jak
edit:
Managed/unmanaged ist nicht das selbe wie kaskadierbar.
Kaskadieren bedeutet mehrere Hubs hintereinander zu schalten

[spunz]

viele hubs/switche haben nen schalter wo man zischen normalen und gekreuzten kabel umschalten kann.

[jak]

Es gibt glaub ich sogar schon welche die das automatisch erkennen.

Jak