LSR hashing when an Entropy Label is present in the packet's label stack

The LSR hashing procedures are modified as follows:

• If the lbl-only hashing option is enabled, or if one of the other LSR hashing options are enabled but an IPv4 or IPv6 header is not detected below the bottom of the label stack, the LSR hashes on the Entropy Label (EL) only.

• If the lbl-ip option is enabled, the LSR hashes on the EL and the IP headers.

• If the ip-only or eth-encap-ip is enabled, the LSR hashes on the IP headers only.