Руководство По Обслуживанию для Cisco Cisco Expressway
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The Filter by Keywords option is applied to messages already filtered by severity.
■
You can use up to five keywords, which includes groups of words (for example 'login successful'), separated
by commas.
by commas.
■
You can use a maximum of 256 characters in the keyword search.
■
We recommend that you search for the most relevant keywords first to avoid any impact on system
performance. This ensures the system pushes the relevant log messages to the syslog server at the earliest
opportunity.
performance. This ensures the system pushes the relevant log messages to the syslog server at the earliest
opportunity.
What are the Typical Values used for my Syslog Server?
The following table should help you select the format that best matches your logging server(s) and network
configuration and shows the typical values used.
configuration and shows the typical values used.
Message format
Transport protocol
Suggested port
RFC
Legacy BSD format
UDP
514
IETF syslog format
UDP
514
IETF syslog using TLS connection
TLS
6514
Table 9 Syslog message formats
Notes:
■
The UDP protocol is stateless. If reliability of syslog messages is very important in your environment, you
should use a different transport protocol.
should use a different transport protocol.
■
If there is a firewall between the Expressway and the syslog server, you must open the appropriate port to
allow the messages through.
allow the messages through.
■
If you select TLS transport, the Expressway must trust the syslog server's certificate. Upload the syslog
server's CA certificate to the local trust store if necessary.
server's CA certificate to the local trust store if necessary.
■
CRL checking when using TLS is disabled by default. To enable CRL, set CRL checking to On and ensure that
relevant certificate revocation lists (CRLs) are loaded.
relevant certificate revocation lists (CRLs) are loaded.
for more information.
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The remote server cannot be another Expressway.
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An Expressway cannot act as a remote log server for other systems.
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The Expressway uses the following facilities for remote logging. The software components / logs that map to
the (local) facilities are emphasised:
the (local) facilities are emphasised:
—
0 (kern)
—
3 (daemon)
—
16 (local0) Administrator
—
17 (local1) Config
—
18 (local2) Mediastats
—
19 (local3) Apache error
—
20 (local4) etc/opt/apache2
—
21 (local5) Developer
—
22 (local6) Network
Configure System Metrics Collection on Expressway
In the following procedure you'll use the web interface to configure the Expressway to collect statistics and publish
them to a specified server.
them to a specified server.
188
Cisco Expressway Administrator Guide
Maintenance