Cisco Cisco Expressway Maintenance Manual
Response time
(ms)
(ms)
The time taken (in ms) for the request to be sent from the Expressway to the host system and
back again.
back again.
Traceroute
The Traceroute tool (Maintenance > Tools > Network utilities > Traceroute) can be used to assist in troubleshooting
system issues.
system issues.
It allows you to discover the route taken by a network packet sent from the Expressway to a particular destination host
system. It reports the details of each node along the path, and the time taken for each node to respond to the request.
system. It reports the details of each node along the path, and the time taken for each node to respond to the request.
To use this tool:
1.
In the Host field, enter the IP address or hostname of the host system to which you want to trace the path.
2.
Click Traceroute.
A new section will appear with a banner stating the results of the trace, and showing the following information for
each node in the path:
each node in the path:
TTL
(Time to Live). This is the hop count of the request, showing the sequential number of the node.
Response
This shows the IP address of the node, and the time taken (in ms) to respond to each packet received
from the Expressway.
from the Expressway.
***
indicates that the node did not respond to the request.
The route taken between the Expressway and a particular host may vary for each traceroute request.
Tracepath
The Tracepath tool (Maintenance > Tools > Network utilities > Tracepath) can be used to assist in troubleshooting
system issues.
system issues.
It allows you to discover the route taken by a network packet sent from the Expressway to a particular destination host
system.
system.
To use this tool:
1.
In the Host field, enter the IP address or hostname of the host system to which you want to trace the route.
2.
Click Tracepath.
A new section will appear with a banner stating the results of the trace, and showing the details of each node along
the path, the time taken for each node to respond to the request, and the maximum transmission units (MTU).
the path, the time taken for each node to respond to the request, and the maximum transmission units (MTU).
The route taken between the Expressway and a particular host may vary for each tracepath request.
DNS Lookup
The DNS lookup tool (Maintenance > Tools > Network utilities > DNS lookup) can be used to assist in
troubleshooting system issues.
troubleshooting system issues.
It allows you to query DNS for a supplied hostname and display the results of the query if the lookup was successful.
To use this tool:
1.
In the Host field, enter either:
—
the name of the host you want to query, or
—
an IPv4 or IPv6 address if you want to perform a reverse DNS lookup
213
Cisco Expressway Administrator Guide