Setting the clock scale, Syslog for session table entries – Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) User Manual
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Brocade Virtual ADX Server Load Balancing Guide
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Sample show commands
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For DNS and RADIUS UDP load balancing, the age value does not follow the normal configuration
and default value unless the udp-normal-age option is configured on the port, under the virtual
server port definition, the port dns udp-normal-age command. (Refer to
on page 121.) The default UDP age will always be 2 minutes unless the
udp-normal-age option is configured.
Setting the clock scale
The Brocade Virtual ADX uses a configurable clock scale for the following session timers:
•
TCP age
•
UDP age
To adjust the clock scale for configurations that require TCP or UDP timeouts longer than the
maximum configurable value (60 minutes), enter a command such as the following.
Virtual ADX(config)#server clock-scale 2
When you set the clock scale to 2, the TCP and UDP age timer values are multiplied by 2. As a
result, a TCP age of 60 would then be equivalent to 120 minutes instead of 60 minutes.
Syntax: [no] server clock-scale multiplier
The multiplier variable can be a value from 1 through 20. The default is 1.
Syslog for session table entries
You can configure the Brocade Virtual ADX to send a message to external Syslog servers when the
software creates a session table entry. The messages indicate the following information:
•
Source IP address
•
Source TCP or UDP application port
•
Destination IP address
•
Destination TCP or UDP application port
•
Layer 4 protocol (TCP or UDP)
•
Message time (measured in units of 100 milliseconds, relative to system uptime)
•
URL (optional)
•
Cookie (optional)
You can enable TCP/UDP logging on a global basis for all TCP and UDP ports or for individual TCP or
UDP ports.
When you enable TCP/UDP logging, you can specify whether all new session table entries generate
log messages or only the entries that are used for Source NAT.
In addition, you can enable logging for URL or Cookie information. The URL logging option applies
only when URL switching is enabled. The Cookie logging option applies only when Cookie switching
is enabled.
Here is an example of a Syslog message for a session.
src-ip = 192.168.002.032 src-port = 00197 dst-ip = 192.168.002.012
dst-port = 00080 protocol = TCP time =0000078656 Url = abcdefghijklmnop
Cookie = qrstuvwxyz