TCP/IPv6 Configuration and Management Manual (G06.24+)

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
8-154
STATS PROCESS Command for TCP6SAM
route to the destination or the route to the destination has gone down; a
nonexistent address has been specified; the process listening on the port has gone
down; the destination host has crashed; or fragmentation is needed but the “Don't
Fragment” flag is set.
In Echo
is the number of Echo (type 8) messages received. The Echo message is sent
from the source address to the destination address. An Echo Reply message
containing the same data is expected from the destination address.
In Echo Reply
is the number of Echo Reply (type 0) messages received. This ICMP message is
the reply to the Echo (type 8) message. Essentially, an Echo Reply message is just
the original Echo message with the type changed from 8 to 0 and the destination
and source addresses reversed; the data returned in the Echo Reply message is
the same as that sent in the Echo message. The receipt of an Echo Reply
message informs the local host that the remote host is still alive. The data returned
also gives the local host a means of testing the integrity of the link.
In Info Reply
is the number of Information Reply (type 16) messages received. A host or
gateway sends this message—with the source and destination addresses fully
specified—in reply to an Information Request message. Note that the Information
Request/Reply facility, although supported, is rarely used.
In Info Request
is the number of Information Request (type 15) messages received. A host or
gateway can send this message—with the network portion of the source address
and the destination address set to 0—to determine the number of the network on
which it is running. Any host on the network can respond to this request with an
Information Reply message.
In Parameter Problem
is the number of Parameter Problem (type 12) messages received. A host or
gateway sends this message to notify the NonStop TCP/IP subsystem (functioning
as a source host) that one of its datagrams has been discarded because the
header parameters are incorrect.
In Redirect
is the number of Redirect (type 5) messages received. A gateway sends this
message to the NonStop TCP/IP subsystem (functioning as a source host) to
indicate that there is a shorter path to the destination through another gateway.
When the NonStop TCP/IP subsystem receives a Redirect message, it corrects its
routing table to reflect the new route. If a host receives many Redirect messages in