This code works in 2.4.0: (The important part is the dev_set_promiscuity() method.) int vlan_dev_set_mac_address(struct net_device *dev, void* addr_struct_p) { int i; struct sockaddr *addr = (struct sockaddr*)(addr_struct_p); if (netif_running(dev)) { return -EBUSY; } memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); printk("%s: Setting MAC address to ", dev->name); for (i = 0; i < 6; i++) { printk(" %2.2x", dev->dev_addr[i]); } printk(".\n"); if (memcmp(dev->vlan_dev->real_dev->dev_addr, dev->dev_addr, dev->addr_len) != 0) { if (dev->vlan_dev->real_dev->flags & IFF_PROMISC) { /* Already promiscious...leave it alone. */ printk("VLAN (%s): Good, underlying device (%s) is already promiscious.\n", dev->name, dev->vlan_dev->real_dev->name); } else { printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n", dev->name, dev->vlan_dev->real_dev->name); dev_set_promiscuity(dev->vlan_dev->real_dev, 1); } } else { printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n", dev->name, dev->vlan_dev->real_dev->name); } return 0; } But this code in the 2.2.18 kernel does not work. Specifically, the dev_set_promiscuity method fails to actually make the interface promiscious. Anyone know why? int vlan_dev_set_mac_address(struct device *dev, void* addr_struct_p) { int i; struct sockaddr *addr = (struct sockaddr*)(addr_struct_p); if (dev->start) { return -EBUSY; } memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); printk("%s: Setting MAC address to ", dev->name); for (i = 0; i < 6; i++) { printk(" %2.2x", dev->dev_addr[i]); } printk(".\n"); if (memcmp(dev->vlan_dev->real_dev->dev_addr, dev->dev_addr, dev->addr_len) != 0) { if (dev->vlan_dev->real_dev->flags & IFF_PROMISC) { /* Already promiscious...leave it alone. */ printk("VLAN (%s): Good, underlying device (%s) is already promiscious.\n", dev->name, dev->vlan_dev->real_dev->name); } else { printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n", dev->name, dev->vlan_dev->real_dev->name); dev_set_promiscuity(dev->vlan_dev->real_dev, 1); } } else { printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n", dev->name, dev->vlan_dev->real_dev->name); } return 0; } -- Ben Greear ([EMAIL PROTECTED]) http://www.candelatech.com Author of ScryMUD: scry.wanfear.com 4444 (Released under GPL) http://scry.wanfear.com http://scry.wanfear.com/~greear - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/