Transcript Bus Network Errors

Bus Network Errors
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Device additions/removals/failures could
take down entire network
Coax cables easily damaged
Check cables time/domain
Reflectometers must be grounded
Star Network
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Centralized device (hub/switch) would
be a common point of failure
Check for device LED
Cable might effect only one workstation
Ring Networks
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Failure of one disrupts network one comm.
at a time
Wireless
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Check for dead spots
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Interface
Troubleshooting Client
Connectivity
Most prevalent problem types:
 User errors
 Protocol configuration errors
 Cabling issues
 Admin mistakes
Protocol Errors
Configuration
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Check with ipconfig
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-TCP/IP
IP address
Subnet mask
Default gateway
DNS
-IPX/SPX
Unique address
Correct frame type
-NetBeui
Unique name
Wins or LMHOSTS file config.
Apple Talk
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Unique Name
Authentication
Admin creates user profile
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Username
Password; requires that user change it
immediately
Time period required for changing
passwords
Permissions
Admin sets permissions
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Provides access level to resources
Directories
Printers
Servers
Permissions/rights
Inheritable
Group membership
File attributes override permissions
Physical Connectivity
First place to look!
 Cables:
 Unplugged
 Exceeding max length
 Breaks
 Poorly made cables
Network devices
Wiring/Infrastructure
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Wiring
Type
EMI
Distance
Infrastructure
Establish baseline when network is installed
Monitor at peak and non peak times
Be sure new components will coexist with wiring