At which points can traffic be marked or remarked on the Alcatel-Lucent 7750? (Choose two)

Question

Options

• ASAP-ingress only
• BSAP-egress only
• CSAP-ingress and SAP-egress
• DNetwork ingress
• ENetwork egress

• B
  6% (1)
• C
  83% (15)
• D
  11% (2)

Explanation

On the Alcatel-Lucent 7750 SR, traffic can be marked or remarked at SAP ingress, SAP egress (C), and network egress (E). SAP ingress policies classify incoming customer traffic and can set forwarding class/profile and rewrite DSCP or dot1p values; SAP egress policies can remark those bits again before delivering traffic back to the customer. Network egress supports remarking as well - this is where the router sets MPLS EXP (TC) bits or DSCP values on packets heading into the core network.

Why the distractors are wrong:

• A & B are wrong because marking applies to both SAP directions, not just one.
• D (Network ingress) is wrong because the 7750 uses network ingress policies for classification only - it reads and maps existing markings into internal forwarding classes but does not remark traffic at that point.

Memory tip: Think "SAP both ways, network out only." At the SAP (customer edge), you can mark in both directions. At the network (core) side, you only remark on the way out - incoming core traffic is trusted and classified, not rewritten.

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