Specifications

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Cisco Wide Area Application Services Command Reference
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Chapter 3 CLI Commands
(config) auto-discovery
(config) auto-discovery
To configure a WAE to automatically discover origin servers (such as those servers behind firewalls) that
cannot receive TCP packets with setup options and add these server IP addresses to a blacklist for a
specified number of minutes, use the auto-discovery global configuration command. To disable
auto-discovery, use the no form of this command.
auto-discovery blacklist {enable | hold-time minutes}
no auto-discovery blacklist {enable | hold-time minutes}
Syntax Description
Defaults The default auto-discovery blacklist hold time is 60 minutes.
Command Modes global configuration
Device Modes application-accelerator
Usage Guidelines Use the auto-discovery blacklist hold-time command to adjust the blacklist hold time for the TFO
auto-discovery feature. With auto-discovery, the WAE keeps track of origin servers (such as those
servers behind firewalls) that cannot receive TCP packets with options and learns not to send out TCP
packets with options to these blacklisted servers. When a server IP address is added to the blacklist, it
remains on the blacklist for the configured number of minutes. After the hold time expires, subsequent
connection attempts will again include TCP options so that the WAE can redetermine if the server can
receive them. Resending TCP options periodically is useful because network packet loss could cause a
server to be blacklisted erroneously.
Examples The following example shows how to enable TFO auto-discovery blacklist using the auto-discovery
command:
WAE(config)# auto-discovery blacklist enable
Related Commands show statistics auto-discovery
blacklist Specifies the TFO auto-discovery blacklist server configuration.
enable Enables the TFO auto-discovery blacklist operation.
hold-time minutes Specifies the maximum time to hold the blacklisted server address in the
cache. The range is 1–10080 minutes. The default is 60 minutes.