configuration of two lan card of differnet subnets

[sarfraz Khan_2]

hi,

is it possible to use two differnet subnets on hp ux server.
i configured two different subnets with following configuation.

lan 0 : 192.168.5.5
subnet mask : 255.255.255.0
gateway : 192.168.5.100

lan3 : 192.168.8.5
subnetmask : 255.255.255.0
gategway : 192.168.8.1

problem is when one ip is communicating in network other is not replying.
any configuration mistake is there.
below is the /etc/rc.config.d/netconf configuation.

INTERFACE_NAME[0]="lan0"
IP_ADDRESS[0]="192.168.5.5"
SUBNET_MASK[0]="255.255.255.0"
BROADCAST_ADDRESS[0]="192.168.5.255"
INTERFACE_STATE[0]="up"
DHCP_ENABLE[0]="0"
INTERFACE_MODULES[0]=""

# ROUTE_DESTINATION[0]=default
# ROUTE_MASK[0]=""
# ROUTE_ARGS[0]=""
# ROUTE_SOURCE[0]=""


#ROUTE_MASK[0]=""
# ROUTE_GATEWAY[0]="192.168.5.100"
#ROUTE_COUNT[0]="1"


DEFAULT_INTERFACE_MODULES=""
INTERFACE_NAME[3]="lan3"
IP_ADDRESS[3]="192.168.8.5"
SUBNET_MASK[3]="255.255.255.0"
BROADCAST_ADDRESS[3]="192.168.8.255"
INTERFACE_STATE[3]="up"
DHCP_ENABLE[0]="0"
INTERFACE_MODULES[3]=""

ROUTE_DESTINATION[3]=default
ROUTE_MASK[3]=""
ROUTE_GATEWAY[3]="192.168.8.1"
ROUTE_COUNT[3]="1"



please help.

[Larry Klasmier]

What do mean when one is commuicating the other is not replying?

I also believe that only want to configure a single default gateway

[Mikko Niskanen_1]

If the destination IP is reachable via both source IP addresses, you may well have hit an asymmetric routing issue.

I'd suggest following through following docu and determine via p. 12 approach if you're dealing with asymmetric routing

http://mayoxide.com/presentations/Understanding_hpux_routing.pdf

[Manix]

Looks like a routing issue as there are two mentioned gateways.

There can be multiple subnets under a single gateway ,not sure if it`s a requirement to
have multiple gateways.

Thanks
Manix