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Unusual Network Activity
Global RADIUS Encryption Key
Unique RADIUS Encryption Key
for the RADIUS server at
10.33.18.119
Figure C-7. Examples of Global and Unique Encryption Keys
Spanning-Tree Protocol (MSTP) and Fast-Uplink
Problems
Caution If you enable MSTP, it is recommended that you leave the remainder of the
MSTP parameter settings at their default values until you have had an oppor-
tunity to evaluate MSTP performance in your network. Because incorrect
MSTP settings can adversely affect network performance, you should avoid
making changes without having a strong understanding of how MSTP oper-
ates. To learn the details of MSTP operation, refer to the IEEE 802.1s standard.
Broadcast Storms Appearing in the Network. This can occur when
there are physical loops (redundant links) in the topology.Where this exists,
you should enable MSTP on all bridging devices in the topology in order for
the loop to be detected.
STP Blocks a Link in a VLAN Even Though There Are No Redundant
Links in that VLAN. In 802.1Q-compliant switches MSTP blocks redundant
physical links even if they are in separate VLANs. A solution is to use only one,
multiple-VLAN (tagged) link between the devices. Also, if ports are available,
you can improve the bandwidth in this situation by using a port trunk. Refer
to “Spanning Tree Operation with VLANs” in the chapter titled “Static Virtual
LANs (VLANs)” in the Advanced Traffic Management Guide for your switch.
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