[Real Server Group 1 Menu] name - Set descriptive real server group name type - Set real server group type ipver - Set IP version metric - Set metric used to select next server in group rmetric - Set metric used to select next rport in server health - Set group health check content - Set basic health check content slowstr - Set slow start time backup - Set backup real server or group secbkp - Set second backup group realthr - Set real server failure threshold minthrsh - Set minimum threshold limit for Minimum Server Bypass maxthrsh - Set maximum threshold limit for Minimum Server Bypass idsrprt - Set Intrusion Detection Port advhlth - Set an advance group health check formula mhash - Set minmisses hash parameter wlm - Set Workload Manager number secret - Set RADIUS secret viphlth - Enable/disable VIP health checking in DSR mode ids - Enable/disable Intrusion Detection idsfld - Enable/disable Intrusion Detection Group Flood idschain - Enable/disable IDS group participation in inspection chain oper - Enable/disable the access to this group for operator ena - Enable real server in this group dis - Disable real server in this group shut - ShutDown real server in this group add - Add real server rem - Remove real server del - Delete real server group maxconex – Enable/Disable Maximum connections exception cur - Display current group configuration |
Command Syntax and Usage | |
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name <maximum 128 characters> |none | |
Defines an alias for each real server group. This lets the network administrator quickly identify the server group by a natural language keyword value. Values: 1-128 characters | |
type | |
Sets the group server type. Values: local, wanlink | |
ipver <v4 | v6 | mixed > | |
Sets the IP version of the real server group. | |
metric <leastconns|svcleast|roundrobin|minmisses|hash|response|bandwidth|phash> | |
Sets the load balancing metric used for determining which real server in the group is the target of the next client request. For more information, see Server Load Balancing Metrics. Default: leastconns | |
rmetric <roundrobin|hash|leastconns> | |
Sets the load balancing metric used for determining which real server port is the target of the next client request. Values: ![]() ![]() ![]() Default: leastconns | |
health <health check object|inherit> | |
Sets a specific health check for this server, or uses the value defined within the health check itself. Values: ![]() ![]() ![]() Default: tcp (when type is set to local), icmp (when type is set to wanlink) | |
content <filename |/ host / filename> |none | |
Defines the specific content which is examined during health checks (maximum 127 characters). The content depends on the type of health check specified in the health option (see in this table). | |
health arp, clusthcfr, clusthcme, dhcp, dns, dssp, ftp, h2, h2c, http, httphead, https, icmp, imap, ldap, ldaps, link, logexp, nntp, pop3, radius-aa, radius-acc, radius-auth, rtsp, script, sip, sipoptions, smtp, snmp, sslh, sslhtls, sslhv3, tcp, tcphalfopen, tftp, udp, udpdns, virtualwire, wsp, wtls, wtls-wsp, wtls-wtp, wtp, wts | |
Sets the type of health checking performed. For details on these types, see SLB Health Check Types. Default: tcp | |
slowstr [0-600] | |
Specifies the slow start time, in seconds, for this server group. The slow start time is the interval between the time at which the server is identified as up, and the time at which the server is considered part of the server group. Default 0 (indicates immediately) | |
backup <real server ID (alphanumeric) | g <group ID (alphanumeric> | none | |
Sets the real server or real server group used as the backup or overflow server or server group for this real server group. You can assign a backup real server or real server group to prevent loss of service if the entire real server group fails. If the real server group becomes unavailable, Alteon activates the backup real server or real server group until one of the original real servers becomes available again. The backup server or real server group is also used in overflow situations. If all the servers in the real server group reach their maximum connections limit, Alteon activates the backup server or real server group to provide additional processing power until resources become available on one of the original servers. You can assign the same backup real server or real server group to more than one real server group at the same time. Note: When a primary group becomes unavailable, the load balancing metric assigned to the primary group is automatically assigned to the backup group. If the backup group has a metric that is different than the primary group metric, the primary group metric replaces the backup group metric. Default: none | |
secbkp | |
Configures the second backup group in addition to an existing backup group. | |
name <maximum 31 characters> |none | |
Defines an alias for each real server group. This lets the network administrator quickly identify the server group by a natural language keyword value. Values: 1 – 31 characters | |
realthr <real servers (1-15, 0 for disabled)> | |
Specifies a minimum number of real servers available. If the number reaches this minimum limit, a syslog alert message is sent to the configured syslog servers stating that the real server threshold has been reached for the that server load balancing group. Values: 0 – 15 Default: 0 (indicates the feature is disabled) | |
minthrsh (1-1023) | |
Specifies the number of active real servers at which the group status changes to down. For example, suppose a group has 10 real servers. The minthrsh value is 3, and the maxthrsh value is 5. As long as there are more than three real servers active, the group status is up. If any of the group’s real servers fail and the number of active servers reaches three, the group’s status changes to down. If the group is down, if the number of active real servers only goes up to four, the status remains down. When the number of active real servers is five or more, the group status changes to up. Default: 0 Note: When determining the threshold, secondary backups and buddy servers are not counted as active real servers. | |
maxthrsh (1-1024) | |
Specifies the number of active real servers at which the group status changes to up. Default: 1 Note: When determining the threshold, secondary backups and buddy servers are not counted as active real servers. | |
idsrprt <real server port (2-65534)> |any | |
Sets real server port for the Intrusion Detection Server (IDS). | |
advhlth (1&2|3..), 128 |none | |
Defines an advanced health check formula expression for the real servers. This lets you create a boolean expression to health check the real server group based on the state of the virtual services. This command supports two boolean operators, AND and OR, used to manipulate TRUE and FALSE values. Using parentheses with the boolean operators, you can create a boolean expression to state the health of the server group. This command also supports a string expression which is up to 128 characters long. You can also set the formula expression as none. | |
mhash 24|32 <number of sip bits used for minmisses hash> | |
Defines the minmisses hash parameter for this real server. Values: ![]() ![]() Default: 24 bits | |
wlm <1 - 16> | none | |
Sets the Workload Manager number. | |
secret <1 - 32> | none | |
Alteon encrypts a password during the execution of the RSA Message Digest Algorithm (MD5), and the RADIUS server decrypts a password during verification. This value must be the same as the secret value of the RADIUS server of the group. Alteon uses this RADIUS secret value while performing heath checks for this group of RADIUS servers. If the secret value is not configured for the real server group, Alteon uses the global secret value which is configured with the /cfg/slb/advhc/secret command (see /cfg/slb/advhc Advanced Health Check Menu) during health checks for that group of RADIUS servers. Values: 1 – 32 alphanumeric characters | |
viphlth disable|enable | |
Enables or disables VIP health checking in a service. Values: ![]() ![]() Default: enable | |
ids disable|enable | |
Specifies whether to enable Intrusion Detection Server (IDS) load balancing for the designated real server group. This parameter is relevant when used in a filter of type redirect, and when all the real servers in the group are of type IDS (no MAC servers that are directly connected to the Alteon physical ports). This feature can only be configured on real server groups between 1 and 63. Default: disable | |
idsfld disable|enable | |
Specifies whether to enable intrusion detection group flood. When enabled, traffic is flooded to all the IDS real servers in the group in parallel. Values: ![]() ![]() Default: disable | |
idschain disabled|enabled | |
Specifies whether this IDS group is part of a chain of IDS server groups that must receive (in copy mode) the same traffic. This parameter should also be enabled if this group is part of an SSL Inspection chain, even if it is the only group of type IDS in the chain. Note: When this parameter is enabled, the idsfld command parameter must be disabled. Default: disabled ![]() ![]() ![]() ![]() | |
oper disable|enable | |
Enables or disables access to the real server group for operators. | |
ena <real server ID (alphanumeric)> | |
Enables a real server in this group gracefully or on a per group basis. For example, if a real server is a member of more than one group, you can configure this real server to accept requests from all the groups or any number of groups of which that this real server is a member. | |
dis <real server ID (alphanumeric)> | |
Disables a real server in this group gracefully or on a per group basis. | |
shut connection|psession | |
Specifies how to shut down a real server in the server group. Note: When a real server belongs to more than one group, shutting down the real server affects only this group. The real server remains active in the other groups to which it belongs. Values: ![]() ![]() | |
add <real server ID (alphanumeric)> | |
Adds a real server to this real server group. You are prompted to enter the number of the real server to add to this group. | |
rem <real server ID (alphanumeric)> | |
Removes a real server from this real server group. You are prompted for the ID number for the real server to remove from this group. | |
del | |
Deletes this real server group from the Layer 4 software configuration. This removes the group from operation under all virtual servers to which it is assigned. Note: Use this command with caution. If you remove the only group that is assigned to a virtual server, the virtual server will become inoperative. | |
maxconex disabled|enabled | |
Specifies whether to override the maximum connections limit for a server, under certain conditions. When enabled, new connections are allocated to a server for which the maximum connections limit has been reached, if the new connections belong to existing persistent sessions on that server (with pbind set to clientip, sslid, or cookie). Default: disabled | |
cur | |
Displays the current configuration parameters for this real server group. |