bridge alias with ifconfig

peter:/ # brctl addbr br99
peter:/ # ifconfig br99
br99      Link encap:Ethernet  HWaddr 46:E5:37:2D:A4:55
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

peter:/ # ifconfig br99 192.168.5.10 netmask 255.255.255.0 up
peter:/ # ifconfig br99
br99      Link encap:Ethernet  HWaddr 46:E5:37:2D:A4:55
          inet addr:192.168.5.10  Bcast:192.168.5.255  Mask:255.255.255.0
          inet6 addr: fe80::44e5:37ff:fe2d:a455/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:238 (238.0 b)

peter:/ # ifconfig br99:1 192.168.5.11 netmask 255.255.255.0 up
peter:/ # ifconfig br99
br99      Link encap:Ethernet  HWaddr 46:E5:37:2D:A4:55
          inet addr:192.168.5.10  Bcast:192.168.5.255  Mask:255.255.255.0
          inet6 addr: fe80::44e5:37ff:fe2d:a455/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:468 (468.0 b)

peter:/ # ifconfig br99:1
br99:1    Link encap:Ethernet  HWaddr 46:E5:37:2D:A4:55
          inet addr:192.168.5.11  Bcast:192.168.5.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1