Originally posted by: derekb

I heard its possible to change a MAC address on a NIC within AIX 5.3. I always assumed MAC addresses were hard-coded into the card itself, however after looking at lsattr for an ent, the first line alt_addr is true.
Is this possible and is the value, alt_addr the way to do it?

thank you
root@dunmpr01:/var/tmp> lsattr -El ent5
alt_addr 0x000000000000 Alternate Ethernet Address True
chksum_offload yes Checksum Offload Enable True
copy_buffs 32 Transmit Copy Buffers True
copy_bytes 65536 Transmit Copy Buffer Size True
max_buf_huge 64 Maximum Huge Buffers True
max_buf_large 64 Maximum Large Buffers True
max_buf_medium 256 Maximum Medium Buffers True
max_buf_small 2048 Maximum Small Buffers True
max_buf_tiny 2048 Maximum Tiny Buffers True
min_buf_huge 24 Minimum Huge Buffers True
min_buf_large 24 Minimum Large Buffers True
min_buf_medium 128 Minimum Medium Buffers True
min_buf_small 512 Minimum Small Buffers True
min_buf_tiny 512 Minimum Tiny Buffers True
trace_debug no Trace Debug Enable True
use_alt_addr no Enable Alternate Ethernet Address True
#AIX-Forum

Originally posted by: CRM

yes, set the alternate mac address there but check the last flag, use_alt_addr.

This can be used to turn the alternate MAC address on and off, you can see this in action with the historical adapter reconfiguration mode of HACMP (or PowerHA as I suppose I should call it now).

regards

Chris
#AIX-Forum