Regarding the MPLS handling mode of TTL, the following description is correct?

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Bill Rustom Cruz · Accepted Answer

MPLS tags in the TTL, which mean the same as the TTL domain in the IP header. TTL prevents mpLS networks from creating routing loops

Bill Rustom Cruz · Answer

Pipe mode. When an IP message passes through an MPLS network, the IPTTL minus l at the entry point is mapped to the MPLS TTL field

Bill Rustom Cruz · Answer

In Unifor mode, when an IP message passes through an MPLS network, the inbound IPTTL is minus

Bill Rustom Cruz · Answer

The MPLSTTL field is a fixed value

Bill Rustom Cruz · Answer

In MMLSVPI, if you need to hide the structure of the MPLS backbone network, you can use the Uniform mode on Ingress for private network messages

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