[c-nsp] (1|2)800 series hardware-based encryption

[Justin Shore]

The data sheets for the 1800 series all mention hardware-based 
encryption being built into the units.  The 1841 mentions AIM support as 
well for "two to three times the performance of embedded encryption 
capabilities."  No mention of AIM support for the 1861 but it too says 
hardware-based encryption.  Does anyone have any performance numbers for 
IPSec-encrypted GRE on the 1800 series or the 800 series?  I'm looking 
for an inexpensive platform for originating IPSec-encrypted GRE tunnels. 
  Throughput will be reasonably low.  OSPF and EIGRP support is 
required.  It looks like the most cost-effective solution is the 881 
with the Adv IP code which replaces the 871 (same price).  The 1811, 
1841 and 1861 all require DRAM and flash upgrades to support their 
respective image that has IPSec and IGP support (Adv IP for the 1811 and 
Adv Sec for the 1841 and 1861).  That seriously jacks up the price 
compared to the turnkey 881.  Any other recommendations?

Thanks
  Justin