(Supporting ADX v03.1.00) Owner manual

Brocade Virtual ADX Server Load Balancing Guide 167
53-1003247-01
Layer 7 health checks
4
• “RADIUS” on page 174
• “RTSP” on page 174
• “SMTP” on page 175
• “SSL (complete)” on page 175
• “SSL (simple)” on page 176
• “Telnet” on page 176
Application ports
The Brocade Virtual ADX selects a Layer 4 or Layer 7 health check based on whether the
application port is known to the Brocade Virtual ADX. A Layer 4 health check is a TCP or UDP
request and is not related to a specific application. A Layer 7 health check is an application-aware
health check designed for the specific application. The following application ports are known to the
Brocade Virtual ADX. The Brocade Virtual ADX performs Layer 7 health checks for these ports. For
other ports, the Brocade Virtual ADX performs a Layer 4 TCP or UDP health check instead.
• FTP (port 21). Ports 20 and 21 both are FTP ports but on the Brocade Virtual ADX, the name
“FTP” corresponds to port 21.
• HTTP (port 80)
• IMAP4 (port 143)
• LDAP (port 389)
• MMS (port 1755)
• NNTP (port 119)
• PNM (port 7070)
• POP3 (port 110)
• RTSP (port 554)
• SMTP (port 25)
• SSL (port 443)
• TELNET (port 23)
UDP ports include the following:
• DNS (port 53)
• RADIUS (port 1812)
• RADIUS-OLD (port 1645), which is used in some older RADIUS implementations instead of port
1812
NOTE
You can add either port 1812 or port 1645 to a given real or virtual server, but you cannot add
both ports to the same server.
The keepalive health checks are disabled by default. To enable a keepalive health check for an
application port, configure a port profile for the port (which automatically enables the keepalive
globally for the port) or enable the keepalive on individual real servers that use the port.