[c-nsp] ASR 1001 throughput question

[Satish Patel]

ASR 1001 and in base price it comes with 2.5G throughput and we have
10G link coming from ISP and our legit traffic is 1G around majority
time we get DDoS attack around 4 to 5G so i want to use router ACL to
filter traffic so it will drop all packet interface level but real
question is does 2.5G throughput has any effect?  what is 2.5G
throughput here and how it won't fit in my requirement?