Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
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outbound traffic out from the IP port on the VCS to the destination of the outbound communications, and
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return traffic from that destination back to the same VCS IP port.
Note:
this firewall configuration is particularly important if this VCS is a traversal client or traversal server, in order for
Expressway firewall traversal to function correctly.
Remote Listening Ports
The Remote listening ports page (Maintenance > Tools > Port usage > Remote listening ports) shows the
destination IP addresses and IP ports of remote systems with which the VCS communicates.
destination IP addresses and IP ports of remote systems with which the VCS communicates.
Your firewall must be configured to allow traffic originating from the local VCS to the remote devices identified by the
IP addresses and IP ports listed on this page.
IP addresses and IP ports listed on this page.
Note:
there are other remote devices not listed here to which the VCS will be sending media and signaling, but the
ports on which these devices receive traffic from the VCS is determined by the configuration of the destination
device, so they cannot be listed here. If you have opened all the ports listed in the
device, so they cannot be listed here. If you have opened all the ports listed in the
page, the
VCS will be able to communicate with all remote devices. You only need to use the information on this page if you
want to limit the IP ports opened on your firewall to these remote systems and ports.
want to limit the IP ports opened on your firewall to these remote systems and ports.
Network Utilities
This section provides information about how to use the network utility tools:
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: allows you to check that a particular host system is contactable from the VCS and that your network is
correctly configured to reach it.
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: allows you to discover the details of the route taken by a network packet sent from the VCS to a
particular destination host system.
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: allows you to discover the path taken by a network packet sent from the VCS to a particular
destination host system.
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: allows you to check which domain name server (DNS server) is responding to a request for a
particular hostname.
Ping
The Ping tool (Maintenance > Tools > Network utilities > Ping) can be used to assist in troubleshooting system
issues.
issues.
It allows you to check that a particular host system is contactable and that your network is correctly configured to
reach it. It reports details of the time taken for a message to be sent from the VCS to the destination host system.
reach it. It reports details of the time taken for a message to be sent from the VCS to the destination host system.
To use this tool:
1.
In the Host field, enter the IP address or hostname of the host system you want to try to contact.
2.
Click Ping.
A new section will appear showing the results of the contact attempt. If successful, it will display the following
information:
information:
Host
The hostname and IP address returned by the host system that was queried.
Response time
(ms)
(ms)
The time taken (in ms) for the request to be sent from the VCS to the host system and back
again.
again.
Traceroute
The Traceroute tool (Maintenance > Tools > Network utilities > Traceroute) can be used to assist in troubleshooting
system issues.
system issues.
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Cisco TelePresence Video Communication Server Administrator Guide
Maintenance