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05-11-2009 05:16 AM
05-11-2009 05:16 AM
Strange Network issues with new install
a 170.154.182.7x range and I could get to them fine from my machine.
Then the were located to racks - 2 of them have ip addresses in the
170.154.223.X range and they work fine and I can get to them
2 of them were put into another rack and there addresses are 170.154.224.X and I cannot ssh to them from my machine - I can ssh between the 2 machines if I am on the console -
My question is this:
If I put my laptop or a linux box on the 224.X network - I can ssh to them - but not the HP-UX boxes...
Has anyone come across this issue....
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05-11-2009 05:22 AM
05-11-2009 05:22 AM
Re: Strange Network issues with new install
what about the default GW ??? and dns ( name resolving )
mikap
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05-11-2009 05:29 AM
05-11-2009 05:29 AM
Re: Strange Network issues with new install
for the 224 network -
INTERFACE_NAME[0]="lan0"
IP_ADDRESS[0]="170.154.224.46"
SUBNET_MASK[0]="255.255.255.192"
BROADCAST_ADDRESS[0]=""
INTERFACE_STATE[0]=up
DHCP_ENABLE[0]=0
INTERFACE_MODULES[0]=""
ROUTE_DESTINATION[0]="default"
ROUTE_MASK[0]=""
ROUTE_GATEWAY[0]="170.154.224.1"
ROUTE_COUNT[0]="1"
ROUTE_ARGS[0]=""
for the 223.x boxes...
INTERFACE_NAME[0]="lan2"
IP_ADDRESS[0]="170.154.223.54"
SUBNET_MASK[0]="255.255.255.192"
BROADCAST_ADDRESS[0]=""
INTERFACE_STATE[0]=up
DHCP_ENABLE[0]=0
INTERFACE_MODULES[0]=""
ROUTE_DESTINATION[0]="default"
ROUTE_MASK[0]=""
ROUTE_GATEWAY[0]="170.154.223.1"
ROUTE_COUNT[0]="1"
ROUTE_ARGS[0]=""
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05-11-2009 05:30 AM
05-11-2009 05:30 AM
Re: Strange Network issues with new install
the nsswitch.conf file has files for all entries....
If a do an nslookup - it resolves through the hosts file
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05-11-2009 05:31 AM
05-11-2009 05:31 AM
Re: Strange Network issues with new install
-bash-4.0# netstat -rn
Routing tables
Destination Gateway Flags Refs Interface Pmtu
127.0.0.1 127.0.0.1 UH 0 lo0 4136
170.154.223.54 170.154.223.54 UH 0 lan2 4136
170.154.223.0 170.154.223.54 U 2 lan2 1500
127.0.0.0 127.0.0.1 U 0 lo0 0
default 170.154.223.1 UG 0 lan2 0
224. is same except all the 223's are 224
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05-11-2009 05:40 AM
05-11-2009 05:40 AM
Re: Strange Network issues with new install
the configuration is correct,
maybe there is a miss configuration oon the network level ( Switch - gw ), try to ping the other GW, for example from 224/26 == the IP adress of the GW from 223.
mikap
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05-11-2009 05:45 AM
05-11-2009 05:45 AM
Re: Strange Network issues with new install
The strange thing is, if I hook the 224's to the 223 switch they work fine - (provided I add 223 addresses and gateway)
Also remember, a linux box works fine on the 224 and even my windows box
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05-11-2009 05:50 AM
05-11-2009 05:50 AM
Re: Strange Network issues with new install
what's about changing
SUBNET_MASK[0]="255.255.255.192"
to
SUBNET_MASK[0]="255.255.0.0"?
because you want to change to another subnet with a different third number ...
Volkmar
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05-11-2009 05:51 AM
05-11-2009 05:51 AM
Re: Strange Network issues with new install
strange, but did you try to switch the HP-UX box to your functional LINUX LAN from 224 network ??? maybe there is something wrong on the first 64 IP form 224.
mikap
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05-11-2009 05:55 AM
05-11-2009 05:55 AM
Re: Strange Network issues with new install
I can ssh to them from 223 and ping them - I cannot ping or ssh to the 224's
Its not the switch, since I tried another switch on the 224 network....
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05-11-2009 06:01 AM
05-11-2009 06:01 AM
Re: Strange Network issues with new install
ask the network administrator if there is some rules between Vlan224 and Vlan 223, maybe there are some restriction.
mikap
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05-11-2009 06:04 AM
05-11-2009 06:04 AM
Re: Strange Network issues with new install
I guess that your subnet mask is definitely wrong. You are using the third octet for both network and host identification, while the netmask suggests that the entire third octet is still in network portion.
J.
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05-11-2009 06:08 AM
05-11-2009 06:08 AM
Re: Strange Network issues with new install
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05-11-2009 06:15 AM
05-11-2009 06:15 AM
Re: Strange Network issues with new install
/sbin/init.d/net start
I can get to it for about 2-3 minutes and then nothing...
I just ssh'd from 223 and about 1 minute later I could not...
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05-11-2009 06:16 AM
05-11-2009 06:16 AM
Re: Strange Network issues with new install
Routing tables
Destination Gateway Flags Refs Interface Pmtu
127.0.0.1 127.0.0.1 UH 0 lo0 4136
170.154.224.49 170.154.224.49 UH 0 lan3 4136
170.154.0.0 170.154.224.49 U 2 lan3 1500
127.0.0.0 127.0.0.1 U 0 lo0 0
default 170.154.224.1 UG 0 lan3 0
-bash-4.0# ifconfig lan3
lan3: flags=1843
inet 170.154.224.49 netmask ffff0000 broadcast 170.154.255.255
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05-11-2009 06:29 AM
05-11-2009 06:29 AM
Re: Strange Network issues with new install
usually means you have a gateway that doesn't respond to ICMP echo requests (pings)
try disabling dead gateway detection:
# ndd -set /dev/ip ip_ire_gw_probe 0
you can make the change permanent by adding an entry to /etc/rc.config.d/nddconf
HTH
Duncan
I am an HPE Employee

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05-11-2009 06:46 AM
05-11-2009 06:46 AM
Re: Strange Network issues with new install
It was not only a ping that would stop, but if I had ssh'd to the 224, the session would hang