Two Alcatel-Lucent 7750 SRs are established BGP peers with the following add-paths configuration: R1: configure router bgp add-paths ipv4 send 4 receive R2: configure router bgp add-paths ipv4 send…

Question

Options

• ANone
• B2
• C3
• D4

• A
  7% (2)
• B
  17% (5)
• C
  73% (22)
• D
  3% (1)

Explanation

Option C is correct because the number of routes R2 receives is governed by R1's send limit and R1's available paths, not R2's send limit. R1 is configured to send up to 4 paths (send 4) and holds 3 paths for prefix X - so it advertises all 3 to R2. R2's send 2 setting controls only how many paths R2 pushes outbound to R1, not how many it can accept inbound.

Why the distractors are wrong:

• D (4) is wrong because send 4 is R1's ceiling, not a guarantee - R1 only has 3 paths to advertise, so 4 paths can never arrive.
• B (2) is the classic trap: send 2 is R2's outbound quota to R1, not a cap on what R2 can receive.
• A (None) is wrong because the peers are established BGP neighbors and routes are being exchanged normally.

Memory tip: Think of send N as "my outbound mailbox limit." R2's mailbox can only send 2 letters to R1, but R2's inbox is determined by what R1 chooses to deliver - and R1 is configured to deliver up to 4, with 3 available.

No community discussion yet for this question.