Talk:Multiple network interfaces and ARP flux - Revision history

203.22.30.47 at 05:56, 24 February 2012

2012-02-24T05:56:19Z

82.90.40.138 at 15:04, 11 January 2010

2010-01-11T15:04:11Z

82.90.40.138 at 15:03, 11 January 2010

2010-01-11T15:03:44Z

82.90.40.138: New page: Goodmorning, I have a similar problem. I have following architecture: 2 PC (PC A and PC B). PC A has 2 Ethernet interfaces (A_eth0 and A_eth1). PC B has 2 Ethernet interfaces (B_eth0 an...

2010-01-11T15:02:55Z

New page: Goodmorning, I have a similar problem. I have following architecture: 2 PC (PC A and PC B). PC A has 2 Ethernet interfaces (A_eth0 and A_eth1). PC B has 2 Ethernet interfaces (B_eth0 an...

New page

Goodmorning,

I have a similar problem.

I have following architecture:
2 PC (PC A and PC B).
PC A has 2 Ethernet interfaces (A_eth0 and A_eth1).
PC B has 2 Ethernet interfaces (B_eth0 and B_eth1).

A_eth0 is connected through a wire with B_eth0 (in the middle there is a Switch: SWT_0)
A_eth1 is connected through a wire with B_eth1 (in the middle there is a Switch: SWT_1)

IP addresses used:
A_eth0: 192.168.30.1
A_eth1: 192.168.30.2
B_eth0: 192.168.30.3
B_eth1: 192.168.30.4

netmask: 255.255.255.0

SWT_0 and SWT_1 are 2 different switch (in order to realize a physical separation).

Operating system on both machine: LINUX UBUNTU 9.04

Aim of my test:
- realize communication between A_eth0 and B_eth0
- realize communication between A_eth1 and B_eth1
- A_eth0 and B_eth1 HAVEN'T TO communicate
- A_eth1 and B_eth0 HAVEN'T TO communicate
Problem I have:
- IF I remove wire connection between A_eth0 and B_eth0 THEN B_eth0 is achieved by PC A (passing through the wrong interface B_eth1)
In this case a non-desired communication between A_eth0 and B_eth1 is established.
- IF I remove wire connection between A_eth1 and B_eth1 THEN B_eth1 is achieved by PC A (passing through the wrong interface B_eth0)
In this case a non-desired communication between A_eth1 and B_eth0 is established.

I have realized following steps on both machines:
sysctl -w net.ipv4.conf.all.arp_filter=1
sysctl -w net.ipv4.conf.all.arp_announce=2
sysctl -w net.ipv4.conf.all.arp_ignore=1

/etc/init.d/networking restart

or
sysctl -w net.ipv4.conf.all.arp_filter=0
sysctl -w net.ipv4.conf.all.arp_announce=2
sysctl -w net.ipv4.conf.all.arp_ignore=1

/etc/init.d/networking restart

In any cases the problem is not solved.

Thanks for your attention.
Regards
Paolo

← Older revision		Revision as of 05:56, 24 February 2012
Line 53:		Line 53:
	Regards		Regards
	Paolo		Paolo
		+
		+	I've tried:
		+	net.ipv4.conf.all.arp_filter=0
		+	net.ipv4.conf.all.arp_ignore=1
		+	net.ipv4.conf.all.arp_announce=2
		+	net.ipv4.conf.default.rp_filter=2
		+	net.ipv4.conf.all.rp_filter=2
		+	and it seems to work for me. Daryl Radivojevic

← Older revision		Revision as of 15:04, 11 January 2010
Line 1:		Line 1:
−	~~Goodmorning,~~
−
−	~~I have a similar problem.~~
−
−	~~I have following architecture:~~
−	~~2 PC (PC A and PC B).~~
−	~~PC A has 2 Ethernet interfaces (A_eth0 and A_eth1).~~
−	~~PC B has 2 Ethernet interfaces (B_eth0 and B_eth1).~~
−
−	~~A_eth0 is connected through a wire with B_eth0 (in the middle there is a Switch: SWT_0)~~
−	~~A_eth1 is connected through a wire with B_eth1 (in the middle there is a Switch: SWT_1)~~
−
−	~~IP addresses used:~~
−	~~A_eth0: 192.168.30.1~~
−	~~A_eth1: 192.168.30.2~~
−	~~B_eth0: 192.168.30.3~~
−	~~B_eth1: 192.168.30.4~~
−
−	~~netmask: 255.255.255.0~~
−
−	~~SWT_0 and SWT_1 are 2 different switch (in order to realize a physical separation).~~
−
−	~~Operating system on both machine: LINUX UBUNTU 9.04~~
−
−	~~Aim of my test:~~
−	~~- realize communication between A_eth0 and B_eth0~~
−	~~- realize communication between A_eth1 and B_eth1~~
−	~~- A_eth0 and B_eth1 HAVEN'T TO communicate~~
−	~~- A_eth1 and B_eth0 HAVEN'T TO communicate~~
−	~~Problem I have:~~
−	~~- IF I remove wire connection between A_eth0 and B_eth0 THEN B_eth0 is achieved by PC A (passing through the wrong interface B_eth1)~~
−	~~In this case a non-desired communication between A_eth0 and B_eth1 is established.~~
−	~~- IF I remove wire connection between A_eth1 and B_eth1 THEN B_eth1 is achieved by PC A (passing through the wrong interface B_eth0)~~
−	~~In this case a non-desired communication between A_eth1 and B_eth0 is established.~~
−
−	~~I have realized following steps on both machines:~~
−	~~sysctl -w net.ipv4.conf.all.arp_filter=1~~
−	~~sysctl -w net.ipv4.conf.all.arp_announce=2~~
−	~~sysctl -w net.ipv4.conf.all.arp_ignore=1~~
−
−	~~/etc/init.d/networking restart~~
−
−	or
−	~~sysctl -w net.ipv4.conf.all.arp_filter=0~~
−	~~sysctl -w net.ipv4.conf.all.arp_announce=2~~
−	~~sysctl -w net.ipv4.conf.all.arp_ignore=1~~
−
−	~~/etc/init.d/networking restart~~
−
−	~~In any cases the problem is not solved.~~
−
−	~~Thanks for your attention.~~
−	~~Regards~~
−	~~Paolo~~
−
	Goodmorning,		Goodmorning,

← Older revision		Revision as of 15:03, 11 January 2010
Line 1:		Line 1:
		+	Goodmorning,
		+
		+	I have a similar problem.
		+
		+	I have following architecture:
		+	2 PC (PC A and PC B).
		+	PC A has 2 Ethernet interfaces (A_eth0 and A_eth1).
		+	PC B has 2 Ethernet interfaces (B_eth0 and B_eth1).
		+
		+	A_eth0 is connected through a wire with B_eth0 (in the middle there is a Switch: SWT_0)
		+	A_eth1 is connected through a wire with B_eth1 (in the middle there is a Switch: SWT_1)
		+
		+	IP addresses used:
		+	A_eth0: 192.168.30.1
		+	A_eth1: 192.168.30.2
		+	B_eth0: 192.168.30.3
		+	B_eth1: 192.168.30.4
		+
		+	netmask: 255.255.255.0
		+
		+	SWT_0 and SWT_1 are 2 different switch (in order to realize a physical separation).
		+
		+	Operating system on both machine: LINUX UBUNTU 9.04
		+
		+	Aim of my test:
		+	- realize communication between A_eth0 and B_eth0
		+	- realize communication between A_eth1 and B_eth1
		+	- A_eth0 and B_eth1 HAVEN'T TO communicate
		+	- A_eth1 and B_eth0 HAVEN'T TO communicate
		+	Problem I have:
		+	- IF I remove wire connection between A_eth0 and B_eth0 THEN B_eth0 is achieved by PC A (passing through the wrong interface B_eth1)
		+	In this case a non-desired communication between A_eth0 and B_eth1 is established.
		+	- IF I remove wire connection between A_eth1 and B_eth1 THEN B_eth1 is achieved by PC A (passing through the wrong interface B_eth0)
		+	In this case a non-desired communication between A_eth1 and B_eth0 is established.
		+
		+	I have realized following steps on both machines:
		+	sysctl -w net.ipv4.conf.all.arp_filter=1
		+	sysctl -w net.ipv4.conf.all.arp_announce=2
		+	sysctl -w net.ipv4.conf.all.arp_ignore=1
		+
		+	/etc/init.d/networking restart
		+
		+	or
		+	sysctl -w net.ipv4.conf.all.arp_filter=0
		+	sysctl -w net.ipv4.conf.all.arp_announce=2
		+	sysctl -w net.ipv4.conf.all.arp_ignore=1
		+
		+	/etc/init.d/networking restart
		+
		+	In any cases the problem is not solved.
		+
		+	Thanks for your attention.
		+	Regards
		+	Paolo
		+
	Goodmorning,		Goodmorning,