Hi, I'm trying to implement the following very basic topology: box A: box B: _______ eth0 eth0 _______ | |_ _ _trunk _ _ _| | |______| |_______| Both ethernetcards are 'PWLA8391GT (intel pro/1000 gt desktop adapter)'. The 'e1000' driver is used on both computers. The trunk is a crossover-cable connecting the two nics directly. Box A is runing debian etch(2.6.16-2-amd64-k8-smp) and has been configured with the following configuration: ip link set up dev eth0 modprobe 8021q vconfig set_name_type VLAN_PLUS_VID_NO_PAD vconfig add eth0 2 ip addr add dev vlan2 10.10.2.2/24 broadcast 10.10.2.255 ip link set dev vlan2 up vconfig add eth0 3 ip addr add dev vlan3 10.10.3.2/24 broadcast 10.10.3.255 ip link set dev vlan3 up vconfig add eth0 4 ip addr add dev vlan4 10.10.4.2/24 broadcast 10.10.4.255 ip link set dev vlan4 up ip route add default via 10.10.2.1 Box B is running debian sarge(2.6.15-1-686) and has been configured with the following configuration: ip link set up dev eth0 modprobe 8021q vconfig set_name_type VLAN_PLUS_VID_NO_PAD vconfig add eth0 2 ip addr add dev vlan2 10.10.2.1/24 broadcast 10.10.2.255 ip link set dev vlan2 up vconfig add eth0 3 ip addr add dev vlan3 10.10.3.1/24 broadcast 10.10.3.255 ip link set dev vlan3 up vconfig add eth0 4 ip addr add dev vlan4 10.10.4.1/24 broadcast 10.10.4.255 ip link set dev vlan4 up If I test the nics without vlan they work perfectly. If I use them with the above mentioned conf then eth0 on box a won't recive anything while eth0 on box b is able to both transmitt and recive. I did the following test: on box a: PING 10.10.2.1 (10.10.2.1) 56(84) bytes of data. From 10.10.2.2 icmp_seq=1 Destination Host Unreachable From 10.10.2.2 icmp_seq=2 Destination Host Unreachable From 10.10.2.2 icmp_seq=3 Destination Host Unreachable tcpdump: WARNING: eth0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 22:47:43.081271 arp who-has 10.10.2.1 tell 10.10.2.2 22:47:44.080780 arp who-has 10.10.2.1 tell 10.10.2.2 22:47:46.079810 arp who-has 10.10.2.1 tell 10.10.2.2 22:47:47.079327 arp who-has 10.10.2.1 tell 10.10.2.2 22:47:48.078966 arp who-has 10.10.2.1 tell 10.10.2.2 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vlan2, link-type EN10MB (Ethernet), capture size 96 bytes 22:48:34.087678 arp who-has 10.10.2.1 tell 10.10.2.2 22:48:35.087691 arp who-has 10.10.2.1 tell 10.10.2.2 22:48:36.087707 arp who-has 10.10.2.1 tell 10.10.2.2 22:48:38.087740 arp who-has 10.10.2.1 tell 10.10.2.2 on box b: tcpdump: WARNING: eth0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 23:50:40.507796 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6 23:50:41.507648 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6 23:50:43.507542 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6 23:50:44.507419 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vlan2, link-type EN10MB (Ethernet), capture size 96 bytes 22:52:11.076059 arp who-has 10.10.2.1 tell 10.10.2.2 22:52:12.076072 arp who-has 10.10.2.1 tell 10.10.2.2 22:52:14.076104 arp who-has 10.10.2.1 tell 10.10.2.2 If I do a 'cat /proc/net/dev' on box b I can see that data is being recived and transmitted on eth0 and vlan2 . If I do a ' cat /proc/net/dev' on box a I can only see data being transmitted on eth0 and eth2. There is no reciveing and no dropping of packages on the same interfaces. I have tested with another crossover-cable: same result. I have tried also to assign static macaddr in the arp table on both computers but eth0 on box a still wont recive anything. Anybody got any ideas on what I am doing wrong? Best Regards Andreas
