I am trying to run  yum update for a SME 7.1.3 box.
 
Everything goes fine, the download of the patches completes and it asked
 
"is it ok?"
 
I enter the y (yes)
 
and get the following - have not seen this before, has anybody run into the problem.
 
"warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 217521f6
 
Public key for perl-Net-IPv4Addr-0.10-2.el4.noarch.rpm is not installed
================================================================
No new rpms were installed. No additional commands are required.
================================================================
[root@spamfilter ~]#"