Hello Charles,
1)
The SFP-GE-T module supports 10/100/1000 speeds. Does it mean all 1G SFP SPAs and ASR1002-F onbroad 1G SFPs support 10/100/1000 with SFP-GE-T?
yes, I don't see any advice against this. Also because only SFP slots are present:
Yes: 4 Gigabit Ethernet Small Form-Factor Pluggable (SFP) ports
2) a max data of 4,000 tunnels with the most poweful ESP is reported.
but no specific data for 1002 fixed configuration ASR.
No information about VPN client compatibility.
Hope to help
Giuseppe