SRP vs PKI for authentication

[VAHUJA@aol.com]

iSCSI draft 08 requires use of SRP for authentication, while for Fabric switch authentication, there are proposals in T11 that use PKI. The iSNS also allows PKI for authentication. I have also seen some IP concerns raised recently about SRP...

So my question is - for iSCSI login-time authentication, are there compelling reasons for using SRP instead of PKI?