|
| |
ICMP types for Ping
NOTE: If you need to ping from IP-A to IP-B then enter your sockets as follows:
Src IP Dest IP Port Protocol
IP-A IP-B Type 8 ICMP Echo Request
IP-B IP-A Type 0 ICMP Echo Reply
SNOOP on SUN
root@tpgend02 # snoop -d {inteface-name} host 10.205.13.177
HP-UX Servers dropping Network Connection
Senario:
Servers intermittently lose network connectivity. On closer investigation a number
of pings are attempted from the server, in particular to the default gateway.
If the default gateway is a firewall it will never get a response and so will
subsequently assume the network is down and drop connection. A parameter needs to be changed.
ip_ire_gw_probe:
Enable dead gateway probes. This option should only be disabled on
networks containing gateways which do not respond to ICMP echo
requests (ping).
[0-1] Default: 1 (probe for dead gateways)
From the Unix command line its:
ndd -set /dev/ip ip_ire_gw_probe 0
To ensure it doesn't default following a system reboot, there's a config file on HP-UX
/etc/rc.config.d/nddconf
The parameter is set in here and gets called as part of the system start up.
|
