Mysterious IP associated with Private Interconnect appears in ifconfig output

Grid Version: 11.2.0.4
Platform : Oracle Linux 6.4
We use bond1 for our Private Interconnect. The subnet for this is 10.5.51.xxxx
But another IP appears in ifconfig and oifcfg iflist output. This is shown under bond1 in ifconfig . I have shown it in red below.
This is seems to be configured by Clusterware. Anyone one knows what this is and the role it plays ?
# /u01/grid/product/11.2/bin/oifcfg iflist
bond0  10.5.19.0
bond1  10.5.51.0
bond1  169.254.0.0
bond2  10.5.12.0
bond3  10.5.34.0
# /u01/grid/product/11.2/bin/oifcfg getif
bond1  10.5.51.0  global  cluster_interconnect
bond2  10.5.12.0  global  public
# ifconfig -a
bond0     Link encap:Ethernet  HWaddr A0:36:9F:26:2A:28
          inet addr:10.5.19.46  Bcast:10.5.19.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:21093181 errors:0 dropped:4246520 overruns:0 frame:0
          TX packets:8781028 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:15996129115 (14.8 GiB)  TX bytes:10913945403 (10.1 GiB)
bond1     Link encap:Ethernet  HWaddr A0:36:9F:26:2A:29
          inet addr:10.5.51.25  Bcast:10.5.51.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:9000  Metric:1
          RX packets:16957228829 errors:0 dropped:91363134 overruns:91350881 frame:0
          TX packets:16507123680 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:22253066948104 (20.2 TiB)  TX bytes:18486193782633 (16.8 TiB)
bond1:1   Link encap:Ethernet  HWaddr A0:36:9F:26:2A:29
          inet addr:169.254.123.209  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:9000  Metric:1
<output snipped>

This is expected. From release 11.2.0.2 (if I remember correctly) your interconnect traffic goes over a 169.x.x.x network, configured by HAIP. You are meant to expose all the NICs to Oarcle and let HAIP handle load balancing and failure: do not use bonding.
I described the mechanism in a tutorial I recorded some time ago, I think it was this one:
http://skillbuilders.com/webinars/webinar.cfm?id=79&title=Oracle%2011g%20/%2012c%20Grid%20Infrastructure%20Free%20Tutorial
John Watson
Oracle Certified Master DBA

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