Hi Everyone - Have a 4 port etherchan between ASR1006/4500X(In VSS) - Tried 
virtually all the load-balancing options on the 4500X, but port "1" in the 
portchan group always gets majority of traffic share.


Links are:


ASR1006      4500X (2)

0/0/3            1/1/4

1/0/0            1/1/16

1/0/3            2/1/4

2/0/0            2/1/16


src/dst ip - I get both ports on "primary" 4500X being primarily used (1/1/4 
getting the most)

src/dst mac - I get a bit of a better load spread, but 2/1/4 gets very little 
traffic, and again 1/1/4 gets the most

src/dst port - 1/1/4 gets the most, 2/1/16 gets a lot more (ingress), 2/1/4, 
very little


The portchan peak usage is 2 to 2.5Gb/sec, but would do more, as it is being 
limited by the load-balancing....i.e 1/1/4 will max out at 1G/sec    (We have a 
very bursty traffic.....SP - So mix of Inet/L3VPN/backup/replication etc)


If anyone has some suggestions on how to achieve a better(more even) traffic 
spread, it would be greatly appreciated....Migrating to 10Gb is what we plan to 
do, but am interested in anyones comments on why 1/1/4 is used so heavily 
regardless of the load-balancing algorithm used (Assuming it is because it is 
the "first" port....spanning tree  probably preferring this port?)....the 
ASR1006 only has 2 load-balancing options flow-based or vlan-manual......lol 
and I dont have any interest in setting up manual vlan load-balancing 😉)


Thanks


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