Messages in this thread | | | Date | Tue, 25 Mar 2014 13:08:30 +0800 | From | zhuyj <> | Subject | on kernel 2.6.34.15, vlan and raw packets can not be received with gfar-enet nic |
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Hi, Sandeep Gopalpet
I am a developer. Now I confronted an interesting phenomena. When I used linux kernel 2.6.34.15 on freescale-p2020, I can not receive raw and vlan packets on gfar-enet nic. But with e1000e nic, we can make vlan and raw packets work well. I looked into the source code and find that maybe it is related with hardware insert and remove vlan head. But I have no the specifications of gfar-enet nic. Would you like to give some document or some guides?
Thanks a lot. Zhu Yanjun
The steps are as below.
1. I boot two freescale-p2020 boards with linux kernel 2.6.34.15, then I connected 2 gfar-enet nic cards with a direct network line;
2. On board 1, I checked the driver of eth0
ethtool -i eth0
driver: gfar-enet version: 1.3 firmware-version: N/A bus-info: N/A
On board 2, I checked the driver of eth1
ethtool -i eth1
driver: gfar-enet version: 1.3 firmware-version: N/A bus-info: N/A
3. Then I configure the ip address on the above 2 nic cards.
On board 1,
ifconfig eth0 192.168.1.13/24 up
On board 2,
ifconfig eth1 192.168.1.196/24 up
4. We can access the other board on one board. For example, on board 1, we can ping board 2.
root@p2020rdb:/root> ping 192.168.1.196 PING 192.168.1.196 (192.168.1.196) 56(84) bytes of data. 64 bytes from 192.168.1.196: icmp_req=1 ttl=64 time=2.92 ms 64 bytes from 192.168.1.196: icmp_req=2 ttl=64 time=0.096 ms
5. We configure vlan on these 2 boards. On board 1,
modprobe 8021q vconfig add eth0 4091 ifconfig eth0.4091 10.1.1.13/24 up
On board 2,
modprobe 8021q vconfig add eth1 4091 ifconfig eth1.4091 10.1.1.196/24 up
6. We can access the other board on one board through vlan. For example, on board 1, we can ping board 2 through vlan nic.
root@p2020rdb:/root> ping 10.1.1.196 PING 10.1.1.196 (10.1.1.196) 56(84) bytes of data. 64 bytes from 10.1.1.196: icmp_req=1 ttl=64 time=2.92 ms 64 bytes from 10.1.1.196: icmp_req=2 ttl=64 time=0.096 ms
But we can not access the other board on one board through raw nic. For example, on board, we can not ping board 2.
root@p2020rdb:/root> ping 192.168.1.196 From 192.168.1.196 icmp_seq=1 Destination Host Unreachable From 192.168.1.196 icmp_seq=2 Destination Host Unreachable From 192.168.1.196 icmp_seq=3 Destination Host Unreachable
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