#18045: vif not inherit override MAC address
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Reporter: rceccleston | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Barrier Breaker 14.07
Component: base system | Version: Barrier Breaker 14.07
Keywords: override MAC address |
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An 'override MAC address' bug appears to prevent multiple WDR4900 running
BB Final to act as wireless 'access points' and co-exist on the same
network.
'''**ERROR** - System logs''' - Multiple entries indicate packets received
with the same source and destination MAC address from bridge virtual
interface.
{{{
br-wifi: received packet on eth0.3 with own address as source address
}}}
'''**CAUSE** - Duplicate MAC Address''' - OpenWRT assigns
'''00:04:9F:EF:01:01''' to the first virtual interface, conflicting the
same MAC address across multiple devices.
00:04:9F = Freescale Semiconductor SOC
EF:01:01 = Unique 'virtual interface' identifier
'''**RESOLUTION** - Override MAC Addresses''' - Specify unique MAC address
in 'Interfaces\interface\Advanced Settings\Override MAC Address' For
example, ''''00:04:9F:EF:01:02''''.
Network configuration file
config interface 'wifi'
option _orig_ifname 'wlan1-1'
option _orig_bridge 'true'
option type 'bridge'
option proto 'static'
option ipaddr '###.###.###.###'
option netmask '255.255.255.0'
'''option macaddr '00:04:9F:EF:01:02''''
option ifname 'eth0.#'
'''**BUG** - Broken Bridge''' - The bridged Ethernet interface will not
inherited the new MAC address from the 'br-wifi' interface.
br-wifi Link encap:Ethernet HWaddr '''00:04:9F:EF:01:02'''
inet addr:192.168.3.2 Bcast:192.168.3.255 Mask:255.255.255.0
inet6 addr: fe80::204:9fff:feef:102/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:26 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3532 (3.4 KiB) TX bytes:1420 (1.3 KiB)
eth0.3 Link encap:Ethernet HWaddr '''00:04:9F:EF:01:01'''
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:42 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4734 (4.6 KiB) TX bytes:1650 (1.6 KiB)
'''**FIX** - Repair Bridge''' - Re-Align / correct the MAC address of the
'virtual interface with the following command.
ifconfig '''eth0.3''' hw ether '''00:04:9F:EF:01:02'''
br-wifi Link encap:Ethernet HWaddr '''00:04:9F:EF:01:02'''
inet addr:192.168.3.2 Bcast:192.168.3.255 Mask:255.255.255.0
inet6 addr: fe80::204:9fff:feef:102/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:26 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3532 (3.4 KiB) TX bytes:1420 (1.3 KiB)
eth0.3 Link encap:Ethernet HWaddr '''00:04:9F:EF:01:02'''
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:42 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4734 (4.6 KiB) TX bytes:1650 (1.6 KiB)
Unfortunately, the command should be issued after rebooting the router,
since this fix is lost upon reboot.
Once the above has been completed, the virtual interface will forward /
bridge traffic between the chosen SSID and VLAN, allowing multiple
WDR4900's to co-exist on the same LAN as wireless 'access points'.
--
Ticket URL: <https://dev.openwrt.org/ticket/18045>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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