Command Line Interface Reference Guide > The Information Menu > /info/slb Layer 4 Information Menu
/info/slb
Layer 4 Information Menu
This menu and all sub-menus are only available in the vADC Administrator environment in ADC-VX mode.
Server Load Balancing (SLB) lets you configure Alteon to balance user session traffic among a pool of available servers that provide shared services. In an average network that employs multiple servers without server load balancing, each server usually specializes in providing one or two unique services. If one of these servers provides access to applications or data that is in high demand, it can become overused. Placing this kind of strain on a server can decrease the performance of the entire network as user requests are rejected by the server and then resubmitted by the user stations. With this software feature, Alteon is aware of the services provided by each server and can direct user session traffic to an appropriate server, based on a variety of load-balancing algorithms.
For detailed information on this feature, see the Alteon Command Line Interface Application Guide.
 
[Server Load Balancing Information Menu]
   sess - Session Table Information Menu
   gslb - Global SLB Information Menu
   prximity - Show LLB proximity information
   ddstore - Dynamic Data Store Information Menu
   real - Show real server information
   realtab - Show real server information in table
   fqdn - Show fqdn server information
   group - Show real server group information
   grptab - Show real server group information in a table
   virt - Show virtual server information
   virttab - Show virtual server information in a table
   filt - Show filter information
   port - Show port information
   wlm - Show Workload Manager information
   idshash - Show IDS server selected by hash or minmisses metric
   bind - Show real server selected by hash, phash, or minmisses metric
   bind6 - Show IPv6 real server selected by hash, phash, or minmisses metric
   synatk - Show SYN attack detection information
   dump - Show all layer 4 information
   ssl     - Show SSL information
 
Layer 4 Information Menu Options (/info/slb) 
Command Syntax and Usage
sess
 
Displays the Session Table Information menu. To view this menu, see /info/slb/sess Session Table Information.
gslb
 
Displays the Global SLB Information menu. To view this menu, see /info/slb/gslb Global SLB Information Menu.
prximity
 
Displays LLB proximity information.
ddstore
 
Displays the Dynamic Data Store Information menu. To view this menu, see /info/slb/ddstore Dynamic Data Store Information Menu.
real <real server ID >
 
Displays the real server ID, real IP address, MAC address, VLAN, physical port, layer where the health check is performed, the health check ID and type, and the health check result and the reason for which the real server is considered Down. The failure reason displays when the runtime status of the server is Down or Overloaded, otherwise the failure reason is empty.
realtab
 
Displays real server information in tabular format.
fqdn
 
Displays FQDN server information.
group <real server group ID >
 
Displays the real server group information, the health check ID and type, and the health check result and the reason for which the real server associated with the group is considered Down. The failure reason displays when the runtime status of the server is Down or Overloaded, otherwise the failure reason is empty.
Note: When a primary real server does not respond to a health check, or is disabled, this command displays the primary server as failed. To view the status of the backup real server, use /info/slb/virt x, or /info/slb/filt x (if a filter is configured).
grptab
 
Displays real server group information in tabular format.
virt <virtual server ID >>
 
Displays the following:
*Virtual Server State — virtual server ID, IP address, virtual MAC address.
*Virtual Port State — Virtual service or port, server port mapping, real server group, group backup server and the reason for which the real server associated with the virtual service is considered Down. The failure reason displays when the runtime status of the server is Down or Overloaded, otherwise the failure reason is empty.
Note: The Alteon VA translates the VMware's MAC address assigned to virtual servers and interfaces to its own, internal MAC address for internal processing. It switches the Alteon VA MAC address back to the VMware MAC address when it sends the packet back to the VMware switch. Therefore, the internal Alteon VA MAC address is shown in some of the tables and dumps.
virttab
 
Displays virtual server information in tabular format.
filt <filter ID (1-2048)> |list|allow|deny|redir|nat
 
Displays the filter number, destination port, real server port, real server group, health check layer, group backup server, URL for health checks, and real server group, IP address, backup server, and status.
port <port number>
 
Displays the physical port number, proxy IP address, filter status, a list of applied filters, and client and/or server Layer 4 activity.
wlm <work_load_manager_number, 1 to 16>
 
Displays workload manager information.
idshash <IP address 1 IP address 2>
 
Displays the Intrusion Detection System server selected by the hash or minmisses metric.
bind <IP address mask group number>
 
Displays the real server selected by the hash, phash, or minmisses metric.
bind6 <IPv6 address prefix length IPv6 group number>
 
Displays the IPv6 real server selected by the hash, phash, or minmisses metric.
synatk
 
Displays SYN attack detection information. To identify if the server is under a SYN attack, the number of new half open sessions is examined within a set period (for example, every two seconds). This feature requires dbind to be enabled.
Note: The delayed bind enable mode is supported for backward compatibility only. Virtual services and filters that were configured with delayed bind enable, and SYN protection in older versions, will retain the capability after upgrade, but this feature is no longer available for new virtual services and filters.
dump
 
Displays all Layer 4 information. For a sample output, see /info/slb/dump Show All Layer 4 Information.
ssl
 
Displays the full cipher list per cipher suite. The SSL cipher list can be viewed per SSL policy or cipher suite string. To view this menu, see /info/slb/ssl SSL Menu.