Which of the following statements regarding the last two octets of the LDP identifier is true?
Which of the following statements regarding the last two octets of the LDP identifier is true?
For LDP identifiers, the last two octets are used to identify a specific label space within the Label Switch Router (LSR). When a router employs a per-platform label space, this value is always zero. This is because in a per-platform label space setup, labels are not differentiated based on interfaces but are instead managed centrally by the platform, necessitating a zero value for these octets.
The last 2 bytes identify a specific label space within the LSR. If the router uses a per-platform label space, this value is zero. The 7750 SR uses a per-platform label space.
LDP Identifier—A 6-byte field that uniquely identifies the label space of the sending LSR (label switch router). The first 4 bytes identify the LSR and must be a globally unique value, such as a 32-bit router ID. The last 2 bytes identify a specific label space within the LSR (Figure 12.3). If the router uses a per-platform label space, this value is zero. The 7750 SR uses a per-platform label space.