Free Juniper JN0-683 Actual Exam Questions - Question 9 Discussion
Which two statements are correct when load balancing is enabled in this scenario? (Choose two.)
A/C for me. The inner packet fields usually aren’t part of the hash calculation because VXLAN load balancing typically relies on outer headers, especially the source UDP port which changes per flow. The destination port is fixed (usually 4789), so B is definitely out. D could be true in some cases, but without explicit mention of special config or software version, it’s safer to go with A and C.
Makes sense that destination port won’t help since it’s fixed, so B is out. The source port (C) is likely used for hashing, and inner packet fields aren’t included, so A fits as well. A and C.
B imo, destination port is fixed so it won't help with load balancing.
Guessing A and C since the source port usually changes and helps spread load.
Maybe A and C. The destination port is always 4789 for VXLAN, so it won’t affect hashing. The source port changes per packet, which helps distribute traffic, and the inner packet fields usually aren’t included in the hash.
It’s C and A for me. Since the destination UDP port for VXLAN is always 4789, it doesn’t help with hashing because it’s constant. The source port varies and gets used in the hash calculation to spread traffic across ECMP paths. Also, the inner packet fields usually aren’t part of the load balancing hash since that would be too complex and could cause reordering issues. So A and C make the most sense here.
Option A and B seem more plausible here. Since VXLAN encapsulates the original packet, the load balancing usually relies on outer headers, not the inner packet fields, so A fits. Also, the destination UDP port is fixed for VXLAN (usually 4789), which might be used in hashing, making B likely. Option C is less likely because the source port can vary but isn't typically used for load balancing in VXLAN ECMP. Option D seems off since inner packet fields generally aren't part of the load balancing hash in VXLAN scenarios.
This one’s tricky because VXLAN uses UDP, but I’m not sure if the source or destination port is hashed for ECMP load balancing. Anyone know if it’s C or B? Also, the question doesn’t say which VXLAN version or device, which might affect whether inner packet fields are included in the hash. Could that be why both A and D are options? Would like some clarification on what exactly “load balancing enabled” means here—just hashing on outer headers or including inner?