Command Line Interface Reference Guide > The SLB Configuration Menu > /cfg/slb/port <port number> Port SLB Menu
/cfg/slb/port <port number>
Port SLB Menu
You can enable or disable processing independently for each type of Layer 4 traffic (client and server) on a per port basis, expanding your topology options.
When changing the filters on a given port, it may take some time before the port session information is updated so that the filter changes take effect. To make port filter changes take effect immediately, clear the session binding table for the port (see the clear command at /oper/slb/gslb Global SLB Operations Menu).
 
[SLB Port 1 Menu]
client - Enable/disable client processing
server - Enable/disable server processing
rts - Enable/disable RTS processing
hotstan - Enable/disable hot-standby processing
intersw - Enable/disable inter-switch processing
vlan - VLAN for inter-switch processing
proxy - Enable/disable use of PIP for ingress traffic
filt - Enable/disable filtering
add - Add filter to port
rem - Remove filter from port
l3filt - Enable/disable l3 filtering
idslb - Enable/disable intrusion detection server load balancing
     monitor - Enable/disable AppWall Monitoring
cur - Display current port configuration
 
Port Configuration Menu Options (/cfg/slb/port) 
Command Syntax and Usage
client disable|enable
 
For Server Load Balancing (SLB), the port can be enabled or disabled to process client Layer 4 traffic. Ports configured to process client request traffic bind servers to clients and provide address translation from the virtual server IP address to the real server IP address, re-mapping virtual server IP addresses and port values to real server IP addresses and ports. Traffic not associated with virtual servers is switched normally. Maximizing the number of these ports on the Layer 4 switch improve Alteon’s potential for effective SLB.
Default: enable
server disable|enable
 
Ports configured to provide real server responses to client requests require real servers to be connected to the Layer 4 switch, directly or through a hub, router, or another switch. When server processing is enabled, the port re-maps real server IP addresses and Layer 4 port values to virtual server IP addresses and Layer 4 ports. Traffic not associated with virtual servers is switched normally.
Default: enable
rts disable|enable
 
Enables or disables Return to Sender (RTS) load balancing on this port. This option is used for firewall load balancing or VPN load balancing applications. Enable RTS on all client-side ports to ensure that traffic ingresses and egresses through the same port.
For more information on using RTS, see the Firewall Load Balancing and VPN Load Balancing chapters in the Alteon Command Line Interface Application Guide.
Note: You cannot use RTS in conjunction with redirection filters for the following conditions:
*If delayed binding (/cfg/slb/filt x/adv/redir/dbind) or Layer 7 lookup (/cfg/slb/filt x/adv/layer7/l7lkup) are enabled
*If proxy IP (PIP) is enabled (/cfg/slb/port x/proxy ena) and client proxy is disabled (/cfg/slb/filt x/adv/proxyadv/proxy dis)
If you do so, you will receive an error message.
Default: disable
hotstan disable|enable
 
Specifies whether to enable hot standby processing on the switch port.
Standby ports drop data when Alteon is in the backup state.
Default: disable
Use this option and the intersw option in conjunction with VRRP hot-standby failover.
intersw
 
Enables or disables interswitch processing. This option is enabled for VLANs connected to a peer. After enabling interswitching, you are prompted to enter the VLAN number on which the peer resides.
Default: disable
vlan (1 to 4090)
 
Sets the VLAN for interswitch processing.
ValuesL 1 – 4090
proxy disable|enable
 
Enables or disables a proxy for traffic that ingresses this port. When the PIP is defined, client address information in Layer 4 requests is replaced with this proxy IP address. In SLB applications, this forces the response traffic to return through Alteon, rather than around it, as is possible in complex routing environments.
Proxies are also useful for application redirection and NAT. When pip is used with application redirection filters, each filter’s rport parameter must also be defined (see rport at /cfg/slb/filt <filter number> SLB Filter Menu).
Default: enable
filt disable|enable
 
Enables or disables filtering on this port. Enabling the filter sets up the real server to examine VPN session table.
Note: After port filtering is enabled or disabled and you apply the change, session entries are deleted immediately.
Default: disable
add <filter ID (1 to 2048)|block of IDs (first-last)>
 
Adds a filter or a block of filters for use on this port.
Values: 1 – 2048, or block of IDs (for example, 1 – 100)
rem <filter ID (1 to 2048)|block of IDs (first-last)>
 
Removes a filter or a block of filters from use on this port.
Values: 1 – 2048, or block of IDs (for example, 1 – 100)
l3filt <disable|enable>
 
Enables or disables Layer 3 filtering.
Default: disable
idslb <disable|enable>
 
Enables or disables Intrusion Detection System (IDS) SLB on this port. IDSLB is performed at the end of filter processing or at the end of client processing when filtering is not enabled. With client processing, IDSLB is enabled on a port and a real server group is designated for IDSLB.
Default: disable
symantec <disable|enable>
 
Enables or disables Symantec processing for troubleshooting purposes.
monitor <disable|enable>
 
Enables or disables AppWall monitoring.
cur
 
Displays the current system parameters.