Command Line Interface Reference Guide > The SLB Configuration Menu
/cfg/slb/virt/service/basic-slb/pip
Proxy IP Menu
Network address translation (NAT) is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device.
There are several types of NAT mechanism, but the most common method is to hide an entire IP address space behind a single IP address, or a small group of IP addresses. To allow correct handling of returned packets, a many-to-one NAT mechanism must modify higher-level information such as TCP/UDP ports in outgoing communications.
Client proxy specifies whether to translate the source IP to a specified NAT address before forwarding the packet to the server. This capability can be optionally used to hide the original client IP, but it is mandatory in the following cases:
*When client and servers belong to the same IP address space (subnet). By using NAT on the client IP, traffic returning from the server is forced to pass through Alteon.
*When HTTP multiplexing is enabled.
*When the clients and servers have different IP versions (IPv4/v6 gateway conversion is performed).
 
[Proxy IP Menu]
mode - Set proxy IP mode
addr - Set PIP address/subnet for this virtual service
nwclss - Set PIP network class for this virtual service
cur - Display current Proxy IP configuration
 
Proxy IP Menu Options (/cfg/slb/virt/service/basic-slb/pip) 
Command Syntax and Usage
mode disable|ingress|egress|address|nwclss
 
Enables or disables proxy IP selection based on the ingress port or VLAN, egress port or VLAN, IP address or IP network class. By default, the SP selects the proxy IP address based on the ingress port or VLAN.
Values:
*disable — Do not perform Client NAT for this service.
*ingress — Perform Client NAT using the NAT (PIP) address configured on the ingress port or VLAN.
*egress — Perform Client NAT using the NAT (PIP) address configured on the egress port or VLAN.
*address — Perform Client NAT using the specified NAT (PIP) address and subnet mask (for an IPv4 server) or prefix (for an IPv6 server).
*nwclss — Perform Client NAT using the specified IPv4 and/or IPv6 network class.
Default: ingress
addr
 
Sets the IPv4 and/or IPv6 PIP address or subnet. When a subnet is configured, PIP persistence mode can be selected.
Options:
*IPv4 PIP address or none
*IPv4 PIP mask
*IPv6 PIP address or none
*IPv6 PIP prefix
*PIP persistence
nwclss
 
Sets the IPv4 and/or IPv6 network class as PIP, and enables PIP persistence mode.
Options:
*IPv4 PIP network class or none
*IPv6 PIP network class or none
*PIP persistence
cur
 
Displays the current PIP configuration.