Hi, I am need to port an application that uses bridge-utils. I have cross compile the modules to the root filesystem and busybox 1.16 to the root filesystem. However when I want to setup the bridge, the following error occured: # brctl addbr br0 # brctl addif br0 eth0 device eth1 entered promiscuous mode device eth1 left promiscuous mode brctl: bridge br0: Invalid argument May I know what causes the problem and how can I resolve it? Below are the initialization log CPU: XScale-IXP43x Family [69054041] revision 1 (ARMv5TE), cr=000039fb CPU: VIVT data cache, VIVT instruction cache Machine: Intel KIXRP435 Reference Platform Memory policy: ECC disabled, Data cache buffered Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512 Kernel command line: console=ttyS0,115200 root=/dev/ram initrd=0x01800000,20M ramdisk=20480 mem=128M&0x00000000 PID hash table entries: 512 (order: -1, 2048 bytes) Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) Memory: 128MB = 128MB total Memory: 105348KB available (3528K code, 300K data, 124K init, 0K highmem) Hierarchical RCU implementation. NR_IRQS:64 Console: colour dummy device 80x30 Calibrating delay loop... 658.63 BogoMIPS (lpj=3293184) Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok NET: Registered protocol family 16 IXP4xx: Using 16MiB expansion bus window size PCI: IXP4xx is host PCI: IXP4xx Using direct access for memory space PCI: bus0: Fast back to back transfers enabled bio: create slab <bio-0> at 0 vgaarb: loaded SCSI subsystem initialized Switching to clocksource OSTS NET: Registered protocol family 2 IP route cache hash table entries: 1024 (order: 0, 4096 bytes) TCP established hash table entries: 4096 (order: 3, 32768 bytes) TCP bind hash table entries: 4096 (order: 2, 16384 bytes) TCP: Hash tables configured (established 4096 bind 4096) TCP reno registered NET: Registered protocol family 1 RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. Trying to unpack rootfs image as initramfs... rootfs image is not initramfs (no cpio magic); looks like an initrd Freeing initrd memory: 20480K IXP4xx Queue Manager initialized. NPE-B: reset: npe_debug_instr(): timeout Installing knfsd (copyright (C) 1996 okir@monad.swb.de). NTFS driver 2.1.29 [Flags: R/O]. JFFS2 version 2.2. (NAND) �© 2001-2006 Red Hat, Inc. msgmni has been set to 246 alg: No test for stdrng (krng) io scheduler noop registered (default) Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled serial8250.0: ttyS0 at MMIO 0xc8000000 (irq = 15) is a XScale console [ttyS0] enabled brd: module loaded IXP4xx MII Bus: probed eth%d: MII PHY 1 on NPE-C eth0: MII PHY 1 on NPE-C eth%d: MII PHY 5 on NPE-A eth1: MII PHY 5 on NPE-A mice: PS/2 mouse device common for all mice Netfilter messages via NETLINK v0.30. nf_conntrack version 0.5.0 (1968 buckets, 7872 max) CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or sysctl net.netfilter.nf_conntrack_acct=1 to enable it. TCP cubic registered NET: Registered protocol family 17 NET: Registered protocol family 15 Bridge firewalling registered Ebtables v2.0 registered XScale DSP coprocessor detected. registered taskstats version 1 RAMDISK: gzip image found at block 0 EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended VFS: Mounted root (ext2 filesystem) on device 1:0. Freeing init memory: 124K Executing /etc/init.d/rcS mounting file system mounting sysfs mount: mounting dev on /dev failed: Invalid argument HOT pluggin ixp4xx_eth: Unknown parameter `no_phy_scan' insmod: can't insert '/lib/modules/2.6.32.7/kernel/drivers/net/arm/ixp4xx_eth.ko': unknown symbol in module or invalid parameter tun: Universal TUN/TAP device driver, 1.6 tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com> MSG: Setting the loopback interface MSG: Setting up IP and default Gateway net eth0: firmware: requesting NPE-C NPE-C: firmware functionality 0x0, revision 0x2:1 route: netmask and route address conflict MSG: Configuring loopback interface net eth1: firmware: requesting NPE-A NPE-A: firmware functionality 0x8D, revision 0x2:1 Enabling IPv4 forwarding net.ipv4.ip_forward = 1 executing the command shell # eth0: link up, speed 100 Mb/s, full duplex