RE: [ASL] AODV-UIUC help

[Vikas K. <ka...@co...>]

I think I know your problem now.
You should enable ip forwarding in your kernel and also turn off icmp 
redirects.

The fastest way would be to copy the snippet provided below onto 
/etc/sysctl.conf and then run sysctl -p

-vikas

#-------------------------------------
### /etc/sysctl.conf
# Enable packet forwarding
net.ipv4.ip_forward = 1

# Enables source route verification
net.ipv4.conf.default.rp_filter = 1

# Enable the magic-sysrq key
kernel.sysrq = 1

# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1

# disable all redirecting
# useful in forcing certain topologies
# escpecially when a weak link exists
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0

#-----------------------------------------


On Tue, 20 Jul 2004, Luo Yang wrote:

->Vikas:
-> Thank you for your quick reply.
->
->When I tried to move all machines together, i.e. every node can see the
->other two nodes directly, The PING test between any two nodes was
->successful, so it is with SSH. But both failed when it requires a
->multi-hop. 
->
->*	There's another thing I don't know whether it's helpful. When I
->compile the AODV-UIUC source code, I got one warning message:
->==================
->aodv.cc: In member function `void aodv::resendRREQ(void*)':
->aodv.cc:1033: warning: taking address of temporary
->==================
->
->*	I also checked the iptables with "iptables -L", the output is:
->		[root@localhost /]# iptables -L
->		Chain INPUT (policy ACCEPT)
->		target     prot opt source               destination
->		 
->
->		Chain FORWARD (policy ACCEPT)
->		target     prot opt source               destination
->
->		Chain OUTPUT (policy ACCEPT)
->		target     prot opt source               destination
->
->The table is empty. Should I add some entry to the Chain FORWARD?
->
->Thanks
->Luo Yang
->
->From: Vikas Kawadia [mailto:ka...@co...] 
->To: Luo Yang
->Cc: asl...@li...
->Subject: Re: [ASL] AODV-UIUC help
->
->
->
->There are too many things in a "system configuration: to just "kindly 
->tell". 
->
->As a first guess, I would suspect you have turned on a firewall
->(iptables) 
->which is eating up all the ping packets.
->
->Can you ssh.
->
->-vikas
->
->
->On Tue, 20 Jul 2004, Luo Yang wrote:
->
->->Dear all:
->->	During last few weeks I was trying to setup AODV-UIUC on 2
->notebooks 
->->and 1 desktop. So far:
->->*	The ASL-a-0.5, AODV-UIUC-0.5 are successfully compiled/installed
->->*	each node able to find neighbours using HELLO and KRT updated
->->*	When I tried to PING a unknown node(10.1.1.3) from node
->->10.1.1.4, the AODV program worked well, adding route to the node in 
->->the KRT.I type the KRT of 10.1.1.4 below:
->->DEST			Gateway		Genmask			Flags
->->Metric Ref		Use		Iface
->->10.1.1.3		10.1.1.2		255.255.255.255	UGH
->->0		0		0		eth1
->->10.1.1.2		10.1.1.4		255.255.255.255	UGH
->->0		0		0		eth1
->->127.0.0.0		*				255.0.0.0
->->U		0		0		0		lo
->->default		*				0.0.0.0
->->U		0		0		0		tun
->->
->->	The network topology is shown below:
->->		10.1.1.4 <----------->10.1.1.2 <---------------->
->->10.1.1.3
->->
->->	Well, my problem is although the AODV works fine, but my data is
->not 
->->transmitted as it should be. When I PING 10.1.1.3 from 10.1.1.4. I can
->
->->saw the KRT updated but there wasn't any reply received at 10.1.1.4. I
->
->->doubt it's due to the system configuration since routing table is 
->->correct.
->->
->->	I'm using RedHat 8.0 (kernel 2.4.18-14). Can u kindly tell me
->what 
->->system configuration I should use to overcome the problem?
->->
->->	Thank you for your kind help
->->
->
->

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