Avaya VTCPD Features (Software Release 2.1 on MPS 2.1) Manual de usuario descargar pdf (Pagina 38)

VTCPD Features User Manual

Page 38 P0602483 Ver: 03.41

VTCPD Features User Manual

Monitoring Host Connections

In case a host process fails, the kernel on the host machine notifies Avaya VTCPD,

which sends a hostdown condition to applications. However, Avaya VTCPD is not

notified if the entire host machine crashes or if the LAN connection is broken. To

detect this situation, Avaya VTCPD must query the host periodically with a ping

command. If a reply is not received within a specified amount of time, Avaya VTCPD

determines that the host is down.

Backup LAN

To ensure continued host connectivity, Avaya VTCPD supports the use of a backup

LAN between the node(s) and host machines. Avaya VTCPD switches to the backup

LAN if host connections through the primary LAN are lost. For multiple hosts and

port numbers, repeat the option for each host/port number.

Monitoring Host Connections

vtcpd -T <timeout>[:<ping-len>] -h len:<str>

Args: -T <timeout>

[:<ping-len>]

Specifies that a ping message is to be sent to the

host every ping-len seconds. (The default is 3.)

If a reply is not received within timeout number

of seconds, the host is deemed to be down.

-h len:<str> Specifies the format of the ping message. For

message formats using delimiters or length

headers (see Message Format on page 46) the

length of the ping message can be equal to zero

(in which case, only the header or delimiter is sent

to the host. The str option is ignored). For fixed-

length format, the length of the ping message

cannot be zero, but can be smaller than the length

of the message specified by the -f option. If str

is not specified, the ping message is filled with

ASCII '0' (e.g., -h4, -h4:0 and

-h4:0000 are equivalent). To specify an

unprintable character, the hexadecimal

representation (0xXX) should be used.

Examples: vtcpd -T 30:10 -h 4:0x00

Generates a ping message every 10 seconds with a total timeout of 30

seconds. The message consists of four binary zeroes.

vtcpd -T 20:5 -h 4:A0x410x42B

Generates a ping message every 5 seconds with a total timeout of 20

seconds. The message is the string "AABB".

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Avaya VTCPD Features (Software Release 2.1 on MPS 2.1) Manual de usuario Pagina 38

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