Owner's Manual

570 | Chapter 18. STP
NETGEAR 8800 User Manual
Figure 54. STP and Network Login Enabled
This relieves the administrator from having to configure network login on all the edge ports.
All the traffic can be monitored and resiliency is provided at the aggregation side.
Figure 55 shows a typical scenario for protecting loops and monitoring traffic on the edge
side.
Figure 55. Traffic Monitoring on the Edge Side
In huge networks, it is not easy to control or prevent end users from connecting devices other
than workstations to the edge ports. This feature helps in preventing the network loops that
occur when end users connect a switch or hub to the existing edge port in order to increase
the number of end user ports.
EX_stp_1082
Switch 1
Root Bridge
Switch 5
Summit
X450-2
Switch 4
Summit
X450-1
Switch 2
1
23 32
2
Indicates only spanning tree.
Indicates both spanning tree
and network login.
Switch 3
Client PCClient PC
EX_stp_1083
Core
Forwarding
Authenticated
Authenticated
Forwarding
Loop
Forwarding
Summit X450a
Extension
Switch
Indicates spanning tree
edge safeguard and
network login.