Changes Pending.....a tad confused!

Does your network use 3DES link encryption?  

You would more than likely know it if you did, because your NMII+s would have integrated Hifn 7902 chips.....which support Link Encryption. Also, your Protocol Processors must have a Hifn 7951 or 7751 compatible PCI card installed in them (to support link encryption).  You can verify the presence of such hardware by using the lspci command at the prompt on the PPs.  

Normally, the NET ENC portion of a NMII+ options file (that HAS link encryption enabled) looks like this:

[NET_ENC]
id = 35
is_encrypted = 1
enc_algorithm = 3DES
enc_static = 0
enc_key = "key at least 24 chars"
filter_non_ip = 1
enc_session_master = 0
enc_asym_key_bits = 2048
enc_key_rotate_ms = 7200000
enc_retry_ms = 4000


The above ENC is old school technology and iDirect has moved on to FIPS 140-2 (TRANSEC) these days.  

iDS 5_0_5?  Wow!  No offense my friend, but I dont know of anyone using iDS 5.X these days.  Time to upgrade!!!