Forum Discussion
ashu2280
Mist
MistR5600 LAG question
Is is recommended to add ports into LAG from different pipelines? If we configure a LAG with port 3 from pipeline 1 and port 7 from pipeline 2. What will happen if port 3 from pipeline 1 goes down? W...
Daniel_Wolf
MVP
MVPHi ashu2280 ,
it is definitely recommended to put ports from 2 different pipelines in a LAG, not 2 from the same pipeline.
What will happen to your traffic if a link goes down? Short answer: traffic keeps flowing, just over fewer links.
You might see a short burst of packet loss or reordering during the transition. TCP will typically recover on its own (retransmit/reorder), but it's not instant or lossless.
Aggregate bandwidth drops proportionally. A 2-member LAG losing one interface goes from 2x to 1x link capacity — so if you were pushing close to full utilization across both, you'll see congestion.
Take a look here: rSeries Networking - Link Aggregation Groups
Cheers
Daniel
