Expert Features

10

 

 

 

 

Expert Layers

 

 

Table 10-1. Expert Symptoms and Analyses by Layer

 

 

 

 

 

 

 

 

 

Layer

 

Expert Symptoms

Expert Analyses

 

 

 

 

 

 

 

 

 

 

Application

 

Excessive ARP

No Server Response

 

 

 

 

 

Excessive BOOTP

No HTTP POST Response

 

 

 

 

 

Excessive Mailslot Broadcasts

NCP Too Many Retransmissions

 

 

 

 

 

FTP Login Attempts

NCP Too Many Requests Denied

 

 

 

 

 

Missed Browser Announcement

NCP Too Many Request Loops

 

 

 

 

 

NCP File Retransmission

 

 

 

 

 

 

NCP Read/Write Overlap

 

 

 

 

 

 

NCP Request Denied

 

 

 

 

 

 

NCP Request Loop

 

 

 

 

 

 

NCP Server Busy

 

 

 

 

 

 

NFS Retransmission

 

 

 

 

 

 

Slow HTTP GET Response

 

 

 

 

 

 

Slow HTTP POST Response

 

 

 

 

 

 

Slow Server Connect

 

 

 

 

 

 

Slow Server Response

 

 

 

 

 

 

SMB Invalid Network Name

 

 

 

 

 

 

SMB Invalid Password

 

 

 

 

 

 

 

 

 

 

 

Session

 

TNS Slow Server Connect

No WINS Response

 

 

 

 

 

TNS Slow Server Response

 

 

 

 

 

 

 

 

 

 

 

Transport

 

Idle Too Long

Non-Responsive Station

 

 

 

 

 

TCP Checksum Errors

Too Many Retransmissions

 

 

 

 

 

TCP Fast Retransmission

 

 

 

 

 

 

TCP Frozen Window

 

 

 

 

 

 

TCP Long Ack

 

 

 

 

 

 

TCP Repeat Ack

 

 

 

 

 

 

TCP Retransmission

 

 

 

 

 

 

TCP SYN Attack

 

 

 

 

 

 

TCP Window Exceeded

 

 

 

 

 

 

TCP Window Probe

 

 

 

 

 

 

TCP Zero Window

 

 

 

 

 

 

 

 

 

 

 

Network

 

HSRP Errors

Duplicate Network Address

 

 

 

 

 

All ICMP Errors

 

 

 

 

 

 

Illegal Network Source Address

 

 

 

 

 

 

IP Checksum Errors

 

 

 

 

 

 

IP Time To Live Expiring

 

 

 

 

 

 

ISL Illegal VLAN ID

 

 

 

 

 

 

Router Storm

 

 

 

 

 

 

Same Network Addresses

 

 

 

 

 

 

Unstable MST

 

 

 

 

 

 

Zero Broadcast Address

 

 

 

 

 

 

 

 

 

 

 

Data Link

 

Bad Frames

None

 

 

 

 

 

Broadcast/Multicast Storms

 

 

 

 

 

 

Illegal MAC Source Address

 

 

 

 

 

 

Network Overload

 

 

 

 

 

 

Physical Errors

 

 

 

 

 

 

Same MAC Addresses

 

 

 

 

 

 

 

 

 

 

10-9

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Finisar Surveyor manual Expert Symptoms and Analyses by Layer Expert Analyses