Date: Wed, 17 Dec 2003 19:06:49 +0100 From: "Schlothauer, Martin" <Martin.Schlothauer@LVERMAFF.brandenburg.de> To: <freebsd-net@freebsd.org> Subject: change the MAC on an vlan interface Message-ID: <C10E3B6457F0D411BA3600D0B7A74F73025AC2E7@sv3.lvaff.kvv-bb.de>
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Hello, I tried to use freevrrpd on an vlan interface and had trouble.=20 When i change the MAC on the vlan interface i lost packets. After restoring the MAC it works again.=20 A simple test whith ifconfig and 3 ping-packets shows the problem. After the first packet i have done=20 # ifconfig vlan0 ether 0:0:5e:0:1:b0 and after the second back with # ifconfig vlan0 ether 00:01:02:69:91:7c The tcpdump on the parent interface is what i expect, but on the vlan0 i missing one echo reply. Whats wrong ?=20 # tcpdump -eni xl0 tcpdump: WARNING: xl0: no IPv4 address assigned tcpdump: listening on xl0 16:42:24.907298 0:1:2:69:91:7c 8:0:2b:e7:51:62 8100 102: 802.1Q vlan#306 = P0 10.133.2.22 > 10.133.2.28: icmp: echo request 16:42:24.907777 8:0:2b:e7:51:62 0:1:2:69:91:7c 8100 102: 802.1Q vlan#306 = P0 10.133.2.28 > 10.133.2.22: icmp: echo reply 16:42:29.340845 0:0:5e:0:1:b0 ff:ff:ff:ff:ff:ff 8100 46: 802.1Q vlan#306 = P0 arp who-has 10.133.2.22 tell 10.133.2.22 16:42:34.917443 0:0:5e:0:1:b0 8:0:2b:e7:51:62 8100 102: 802.1Q vlan#306 = P0 10.133.2.22 > 10.133.2.28: icmp: echo request 16:42:34.917908 8:0:2b:e7:51:62 0:0:5e:0:1:b0 8100 102: 802.1Q vlan#306 = P0 10.133.2.28 > 10.133.2.22: icmp: echo reply 16:42:38.122184 0:1:2:69:91:7c ff:ff:ff:ff:ff:ff 8100 46: 802.1Q = vlan#306 P0 arp who-has 10.133.2.22 tell 10.133.2.22 16:42:44.927599 0:1:2:69:91:7c 8:0:2b:e7:51:62 8100 102: 802.1Q vlan#306 = P0 10.133.2.22 > 10.133.2.28: icmp: echo request 16:42:44.928132 8:0:2b:e7:51:62 0:1:2:69:91:7c 8100 102: 802.1Q vlan#306 = P0 10.133.2.28 > 10.133.2.22: icmp: echo reply ^C 8 packets received by filter 0 packets dropped by kernel # # tcpdump -eni vlan0 tcpdump: listening on vlan0 16:42:24.907289 0:1:2:69:91:7c 8:0:2b:e7:51:62 0800 98: 10.133.2.22 > = 10.133.2.28: icmp: echo request 16:42:24.907780 8:0:2b:e7:51:62 0:1:2:69:91:7c 0800 98: 10.133.2.28 > = 10.133.2.22: icmp: echo reply 16:42:29.340838 0:0:5e:0:1:b0 ff:ff:ff:ff:ff:ff 0806 42: arp who-has = 10.133.2.22 tell 10.133.2.22 16:42:34.917435 0:0:5e:0:1:b0 8:0:2b:e7:51:62 0800 98: 10.133.2.22 > = 10.133.2.28: icmp: echo request 16:42:38.122176 0:1:2:69:91:7c ff:ff:ff:ff:ff:ff 0806 42: arp who-has = 10.133.2.22 tell 10.133.2.22 16:42:44.927591 0:1:2:69:91:7c 8:0:2b:e7:51:62 0800 98: 10.133.2.22 > = 10.133.2.28: icmp: echo request 16:42:44.928135 8:0:2b:e7:51:62 0:1:2:69:91:7c 0800 98: 10.133.2.28 > = 10.133.2.22: icmp: echo reply ^C 7 packets received by filter 0 packets dropped by kernel # Best regards, Martin Schlothauer
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