Command Line Interface Reference Guide > The SLB Configuration Menu
/cfg/slb/virt <server number>/service/mh-sctp
Virtual Server Multi-Homed SCTP Service Configuration Menu
The following menu example is application-specific and includes only the application-specific commands. For all common commands, refer to /cfg/slb/virt <server id>/service/basic-slb Virtual Server Basic SLB Service Configuration Menu.
 
[Virtual Server 2 132 mh-sctp Service Menu]
name - Set descriptive virtual service name
group - Set real server group number
rport - Set real port
hname - Set hostname
thash - Set hash parameter
tmout - Set minutes inactive connection remains open
srvdown - Set connection handling on service down
mirror - Enable/disable session mirroring
sesslog - Enable/disable session logging
applicid - Set virtual service applic name
adv - Service Report Menu
del - Delete virtual service
cur - Display current virtual service configuration
 
Virtual Server Multi-Homing SCTP Service Configuration Options (/cfg/slb/virt/service/mh-sctp) 
Command Syntax and Usage
name
 
Sets a description of up to 32 characters for the virtual service.
group <real server group ID>
 
Sets the real server group for this service.
Default: 1
rport <real server port (0, 1, 5-65534)>
 
Specifies the Layer 4 TCP or UDP port on which the real servers listen for this service.
This parameter must be specified only when all real servers listen for the service on a port that is different from the service port. For all other cases it should be left empty (0).
The real server port can alternatively be defined at real server level, allowing for different listening ports per server.
Values: 0, 1, 5 – 65534
Default: 0. Alteon uses the port defined at /cfg/slb/virt/service<virtual port>.
hname <hostname>|none
 
Sets the hostname for the virtual service.
Alteon uses this together with the domain name configured at virtual server level to create a fully qualified domain name for the virtual service.
For example, to add a host name for Web services, you could specify “www” as the host name. If “foocorp.com” is defined as the domain name, “http://www.foocorp.com” would be the full host or domain name for the virtual service.
The domain and host name are used for global server load balancing as well as for HTTP/S health checking when the health check hname command is defined as inherit.
Maximum characters: 34
thash sip|sip+sport
 
Specifies the parameters for computing the hash value used by the hash, phash, and minmisses SLB metrics.
Tunable hash lets the user select different parameters for computing the hash value used by the hash, phash, and minmisses SLB metrics. For example, the source IP address, or both source IP address and source port. If you do not select any hash parameter, Alteon uses the default sip hash parameter.
Default: sip
tmout <even number of minutes (0-32768)>
 
Specifies the length of time, in minutes, that an inactive session remains in the session table.
Every client-to-server session being load balanced is recorded in the session table. When the client ends the session, the session table entry is removed.
In certain circumstances, such as when a client application is abnormally terminated by the client’s system, TCP and UDP connections remain registered in the session table. In order to prevent table overflow, these orphaned entries must be aged out of the session table.
Values:
*0 — The service uses the inactivity timeout value of the real server, which is 10 minutes by default. The inactivity timeout value is set at /cfg/slb/real/tmout.
*2 – 32768 (in even numbered increments)
Default: 0
srvdown drop|rst
 
Specifies how Alteon handles new connections when a TCP service is unavailable.
This command can be used only when dbind is disabled.
Values:
*rst — Alteon resets the client.
*drop — Alteon drops new requests for the service.
Default: dropDrop
Note: When this command is set to send rst, the VIP address remains in L2/L3 tables even if no services are available on it, to allow new requests to reach Alteon from clients.
mirror disable|enable
 
Specifies whether to enable or disable session mirroring on the selected virtual service.
Session mirroring synchronizes the state of active connections with the standby Alteon to prevent service interruptions in case of failover.
Session mirroring is recommended for long-lived TCP connections, such as FTP, SSH, and Telnet connections. Session mirroring for protocols characterized by short-lived connections such as UDP and in many cases HTTP, is not necessary. Radware recommends that you use session mirroring only when you need to maintain the state of a long connection.
When implementing session mirroring, note the following:
*Session mirroring is supported in VRRP active-standby and hot-standby configurations, as well as Switch HA high availability configurations.
*Session mirroring is only supported for Layer 4 SLB sessions and static NAT filtering sessions.
*Session mirroring is supported only for the following protocols and filters:
SIP
FTP
NAT filters
Layer 4 SLB with delayed binding
*Session mirroring is not supported for the following protocols and filters:
Active-active VRRP
RTSP
Layer 7 SLB
Allow, deny, redir filters
*Session mirroring is not supported in IPv6 Server Load Balancing sessions.
*A direct interswitch link between the primary and backup Alteons is necessary to route the NAAP packets.
Default: disable
sesslog disable|enable
 
Specifies whether to enable or disable session logging.
Session logs are sent to the syslog servers via the data port when the sessions are deleted or aged out. The Alteon switch processor sends the buffered session logging data to the syslog server at regular intervals (every 30 seconds) if the buffer is not completely filled. There will be no session syslog if no sessions have aged out during this duration of 30 seconds.
Note: Syslog servers configured on Alteon must be accessible via the data ports.
Default: disable
applicid
 
Specifies the name used to combine several services into a single application in the virtual service report.
Maximum characters: 261 (64 in Alteon version 32.6.0.0 and earlier)
adv
 
Displays the Service Advanced Menu menu. To view this menu, see /cfg/slb/virt/service/mh-sctp/adv Service Advanced Menu
del
 
Removes this virtual service from operation and deletes it from the Layer 4 switching software configuration.
Note: Use this command with caution, as it will delete the options that have been set for this virtual service.
cur
 
Displays the current configuration of services on the specified virtual server.