If your LPAR is at least AIX 7.1 TL3 SP7 or later, you can use the entstat  command to check for the poll_uplink  status and if it is enabled. Example 3-10 shows an excerpt of the entstat command output in an LPAR where poll_uplink  is not enabled (set to no ). 

# entstat -d ent0 -------------------------------------------------- ETHERNET STATISTICS (en0) : Device Type: Virtual I/O Ethernet Adapter (l-lan) ... General Statistics: ------------------- No mbuf Errors: 0 Adapter Reset Count: 0 Adapter Data Rate: 20000 Driver Flags: Up Broadcast Running Simplex 64BitSupport ChecksumOffload DataRateSet VIOENT ... LAN State: Operational ... # 

Compared to Example 3-10, Example 3-11 shows the entstat  command output on a system where poll_uplink  is enabled and where all physical links that are related to this virtual interface are up. The text in bold shows the additional displayed content: 

GLYPH<SM590000> VIRTUAL_PORT 

GLYPH<SM590000> PHYS_LINK_UP 

GLYPH<SM590000> Bridge Status: Up 

# entstat -d ent0 -------------------------------------------------- ETHERNET STATISTICS (en0) : Device Type: Virtual I/O Ethernet Adapter (l-lan) ... General Statistics: ------------------- No mbuf Errors: 0 Adapter Reset Count: 0 Adapter Data Rate: 20000 Driver Flags: Up Broadcast Running Simplex 64BitSupport ChecksumOffload DataRateSet VIOENT VIRTUAL_PORT PHYS_LINK_UP ... LAN State: Operational Bridge Status: Up ... # 

