We are planning to buy ASR920 can someone please help me to understand the Inline below and purpose of the licence.
Both Looks like a contract for Hardware support but not sure.
SP-AR3-ASR920SI means SP Base, Advanced Replacement (4 hours)
NOTE: "4 hours" means, for hardware replacement, Cisco will provide you with a hardware replacement within 4 hours, any day of the week, day or night.
Basically i want to know why below 2 licenses are required
SP-AR3-ASR920ZD : SP AR HW 24X7X4 Cisco ASR920 Series - 2GE and 4-10GE - D
SP-AR3-ASR920SI : SP AR HW 24X7X4 Cisco ASR920 Series