kern/133178: lagg with wlan laggpport does not work

[Daniel Eischen]

>Number:         133178
>Category:       kern
>Synopsis:       lagg with wlan laggpport does not work
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Mar 29 10:50:03 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Eischen
>Release:        8-0-current
>Organization:
>Environment:
World and kernel built sometime in July, 2008,  i386, original system no longer available for uname.
>Description:
lagg with a non-master wlan laggport does not work.  The MAC address
used for the lagg interface is the MAC of the master port, and in fact
this MAC address does get applied to the wlan interface, but the MAC
change does not get propagated down to the underlying wireless interface
(ath0, for instance).

I'm using something like this in /etc/rc.conf:

  wlans_ath0=wlan0
  ifconfig_wlan0="ssid my_ssid \
                  wepkey 1:0xblah1 wepkey 2:0xblah2 \
                  wepkey 3:0xblah3 wepkey 4:0xblah4 \
                  weptxkey 1 authmode shared"
  ifconfig_bfe0="up"
  cloned_interfaces="lagg0"
  ifconfig_lagg0="laggproto failover laggport bfe0 laggport wlan0"
  ifconfig_lagg0_alias0="inet 10.0.0.7 netmask 0xffffff00"

  $ ifconfig -a
  ath0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290
          ether 00:11:f5:9d:54:f5
          media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
          status: associated
  bfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
          options=8<VLAN_MTU>
          ether 00:14:22:ae:bc:98
          media: Ethernet autoselect (100baseTX <full-duplex>)
          status: active
          lagg: laggdev lagg0
  lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
          inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
          inet6 ::1 prefixlen 128
          inet 127.0.0.1 netmask 0xff000000
  lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
          ether 00:14:22:ae:bc:98
          inet 10.0.0.7 netmask 0xffffff00 broadcast 10.0.0.255
          media: Ethernet autoselect
          status: active
          laggproto failover
          laggport: wlan0 flags=0<>
          laggport: bfe0 flags=5<MASTER,ACTIVE>
  wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
          ether 00:14:22:ae:bc:98
          media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
          status: no carrier
          ssid linksys_SES_45226 channel 6 (2437 Mhz 11g)
          regdomain 105 indoor ecm authmode SHARED privacy MIXED deftxkey 1
          wepkey 1:104-bit wepkey 2:104-bit wepkey 3:104-bit txpower 17.5
          bmiss 7 scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7
          roam:rate 5 protmode CTS wme burst
          lagg: laggdev lagg0

Note that the MAC address for ath0 is different from that of wlan0, so
when lagg failsover to wlan0, it does not work.

As a side note, the examples in lagg(4) still reference the underlying
wireless interface as opposed to wlan:

           # ifconfig em0 up
           # ifconfig ath0 nwid my_net up
           # ifconfig lagg0 laggproto failover laggport em0 laggport ath0 \
                   192.168.1.1 netmask 255.255.255.0

>How-To-Repeat:
Configure a wired and wireless interface with lagg as above.
>Fix:
Work around is to set the MAC address of the lagg interface to the
MAC address of the wireless interface.

  ifconfig lagg0 ether 00:11:f5:9d:54:f5
  ifconfig lagg0 down
  ifconfig lagg0 up

>Release-Note:
>Audit-Trail:
>Unformatted: