User guide

A-6 ExtremeWare EPICenter Software Installation and User Guide
Problem: Telnet polling messages can fill up a device’s syslog file.
For switches running older versions of ExtremeWare (prior to 6.0), the EPICenter server
uses telnet polling to get EDP topology and ESRP information. However, each telnet
login and logout message is logged to the switch’s log file, and will eventually fill up
the log.
You can disable EDP and ESRP logging through the EPICenter Administration applet,
Server Properties page. This will also avoid the syslog messages.
See Chapter 15 for information on the EPICenter Administration applet. See Chapter 3
for instructions on stopping and starting the EPICenter server.
Problem: Traps may be dropped during a trap “storm.”
TheEPICenter serverlimits its processingoftrapsinorder tobe ableto reliablyhandletrap
storms from a single or multiple devices. EPICenter limits its trap processing to 21 traps
every 28 seconds from an individual device, and a total of 275 traps every 55 seconds
system-wide. Anytraps that occur beyond these limits willbediscarded, butwill benoted
in the log.txt file.
Thissituationisrareandshouldbeconsidered abnormal behaviorinthemanageddevices.
If it does occur, the managed devices should be diagnosed and corrected.
VLAN Manager
Problem: Multiple VLANs have the same name.
A VLAN is defined by the name,its tag value,and its protocol filter definition. EPICenter
allows multiple VLANs of the same name if one of the defining characteristics of one
VLAN is different from the other.
Problem: Multiple protocols have the same name.
EPICenterallowsmultiple protocolsofthesamenameif oneof thedefiningcharacteristics
of one protocol is different from the other.