/stats/slb/virt <virtual server ID>
Virtual Server SLB Statistics
Virtual server statistics include the following:

Current and total sessions for each real server associated with the virtual server.

Current and total sessions for all real servers associated with the virtual server.

The highest number of simultaneous sessions recorded for each real server.
Notes

Since a DNS Responder VIP behaves differently than a regular VIP, Alteon does not generate statistics for a DNS Responder VIP.

The virtual server IP address is shown on the last line, below the real server IP addresses.
Enter virtual server numberid (1-1024): 1 Virtual server 1 stats: Current Total Highest Real IP address Sessions Sessions Sessions Octets ---- ---------- -------- -------- -------- ---------------------- 1 OCSFRONTEND1 1 315 4 31543304 2 OCSFRONTEND2 1 240 7 34320779 ---- ------------ -------- -------- -------- ---------------------- 192.168.130.45 2 555 11 65864283 |
When cookie sessions are detected (inserted, rewrite, or passive cookie persistence), additional statistics are added. For example, with passive cookie persistence:
HTTP header loadbalance stats: 'Cookie' Hits: 1 'Cookie' Misses: 1 Cookie + URL Matches: 0 Cookie - URL : 0 Total 'Cookie' Sessions: 2 ------------------------------------------------------------------ Persistent Cookie SLB maintenance stats: Current Total Highest Sessions Sessions Sessions ------------------------- -------- ---------- -------- Unique Sessions 1 1 1 Cookie Sessions 1 2 1 Persistent Port Sessions 1 1 1 |

Cookie Hits — Increments when the existing cookie identifier name matches an entry in the session table.

Cookie Misses — Increments when the cookie identifier in the client request does not match the identifier configured on switch, or when the client request does not include a cookie.

Unique Sessions — The number of persistent entries in the session table.

Cookie Sessions — The number of connections using the persistent entries in the session table.

Persistent Port Sessions — The number of entries on the persistent SP.
Alteon can filter virtual server statistics by service. In addition, when a specific HTTP or HTTPS service is selected with defined content rules, Alteon can filter by rule ID.
For HTTP and HTTPS services, redirect, discard or goto actions are also available. For each action type there is a unique output.
For example, when an HTTP service is set to redirect traffic to virtual server group 3, the following output displays:
Note: When Alteon functions as a gateway between an IPv4 and an IPv6 network, the current sessions counter may remain low. This is because Alteon closes current sessions as soon as it receives a FIN packet from the server.
When Defense Messaging is enabled, the following output, for example, displays:
>> vADC 10 - Server Load Balancing Statistics# /stats/slb/virt 1 Enter virtual port (10-65534), application or all [all]: ------------------------------------------------------------------ Virtual server 1 stats: Virtual server 1 service 55
Service 55 summary statistics -------------------------------- Current Last Hour Avg.Peak Peak Timestamp ------- --------- --------- -------------- Bandwidth (Mbps): 256 542 552 09:28:36 Tue Mar 25, 2020 PPS: 523 478 552 09:28:36 Tue Mar 25, 2020 CPS: 5562 1554 5562 09:28:36 Tue Mar 25, 2020 CEC: 1452 4446 452 09:28:36 Tue Mar 25, 2020 Total Sessions: 0 Highest Sessions: 0 Total Octets: |
The following latency-related statistics are also displayed:

Client RTT — The client round-trip time is the length of time from the moment that Alteon sends a SYN-ACK message to the client, to the moment it receives an ACK from the client.
The client RTT parameter is the average of all client round-trips measured within the sampling period.

Server RTT — The server round-trip time is length of time from the moment that Alteon sends a SYN message to the server, to the moment it receives a SYN-ACK from the server.
The server RTT parameter is the average of all server round- trips measured within the sampling period.

Sideband Processing Time — The sideband processing time is the length of time for which Alteon sends request to the sideband endpoint until it get the response from it.
Note: Sideband processing time is relevant only to sideband TCP/TLS connection.

Application Response — The length of time from the moment the application receives the request until the moment it has the response ready to be sent.
The application response time is the average of all application response times to HTTP requests measured within the sampling period.

Response Transfer — The length of time from the moment that Alteon receives the first response byte from server, to the moment it sends the entire response to the client. The response transfer time is the average of all response transfer times to HTTP requests measured within the sampling period.

Total — The current end-to-end time, which is the sum of the Client RTT, Server RTT, Application Response time, and Response Transfer time parameters.
Note: When a client sends a DNS query to the site, and the site sends a DNS response with the IP address of the remote real server, the client binds to the remote real server directly. In such cases, the statistics at /stats/slb/virt do not include statistics for the remote real server because the site does not act as a proxy or redirect the session.
DNS and redirect statistics for the remote real server are displayed at /stats/slb/gslb/virt.