Testing Tools For Network Connection; Logging Function - 3Com 7700 Configuration Manual

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HAPTER YSTEM
Testing Tools for
Network Connection

Logging Function

ANAGEMENT
You can perform the following operations in all views.
Table 34 Display Diagnostic Information
Operation
display diagnostic information
ping
The ping command can be used to check the network connection and to verify if
the host is reachable.
Perform the following operation in user view.
Table 35 The Ping Command
Operation
Support IP ping
The output of the command includes:
The response to each ping message. If no response packet is received when
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time is out,"Request time out" information appears. Otherwise, the data bytes,
the packet sequence number, TTL, and the round-trip time of the response
packet will be displayed.
The final statistics, including the number of the packets the switch sent out and
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received, the packet loss ratio, the round-trip time in its minimum value, mean
value and maximum value.
Tracert (trace route) command
Tracert is used for testing the gateways from the source host to the destination. It
is used for checking if the network is connected and analyzing where faults occur
in the network.
The execution process of tracert is described as follows: Send a packet with TTL
value as 1 and the first hop sends back an ICMP error message indicating that the
packet cannot be sent, for the TTL is timeout. Re-send the packet with TTL value
as 2 and the second hop returns the TTL timeout message. The process is carried
over and over until the packet reaches the destination. The purpose to carry out
the process is to record the source address of each ICMP TTL timeout message, so
as to provide the route of an IP packet to the destination.
Perform the following operation in user view.
Table 36 The Tracert Command
Operation
Trace route
The Syslog is an indispensable part of the Switch 7700. It serves as an information
center of the system software modules. The logging system is responsible for most
of the information outputs, and it also makes detailed classification to filter the
Command
display diagnostic-information
Command
ping [ -a ip-address ] [-c count ] [ -d ] [ -i {interface-type
interface-num | interface-name } ][ ip ] [ -n ] [ - p pattern ]
[ -q ] [ -r ][ -s packetsize ] [ -t timeout ] [ -v ] host
Command
tracert [ -f first-TTL ] [ -m max-TTL ] [ -p port ] [ -q
nqueries ] [ -w timeout ] host