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Link aggregation performance
Hello,
I'm a little bit disappointed with network performance of OpenBSD and I'm searching other point of view. background I need to put traffic load on a network lab. Naturally, I thought of my favorite distribution,OpenBSD. So I've installed two HP ML370G3 server with OpenBSD 5.2 i386. Each server is equipped with two Intel dual NIC gigabit (plus one embedded gigabit NIC), two Xeon 3.2GHz H.T. and 12GB RAM. I have installed two tools: iPerf and NetPerf. I did this following experiment with this two tools, but the results are similar. From network side, the topology is as follows: A core network with two big chassis and two high performance access stacks (switchs). Each access stack is connected with two 10Gbps fiber links in aggregation. experiment 1 Server A - NIC em0 - Subnet A - @.111 Server B - NIC em0 - Subnet B - @.222 One-way test (64KB window): ~ 870Mbps experiment 2 Server A - NIC trunk0 - Subnet A - @.111 Server A - NIC em0 - trunkport, loadbalance Server A - NIC em1 - trunkport, loadbalance Server B - NIC trunk0 - Subnet B - @.222 Server B - NIC em0 - trunkport, loadbalance Server B - NIC em0 - trunkport, loadbalance Switch side is well configured in aggregation with a hash algorithm based on src.mac+dst.mac+src.ip+dst.ip+src.port+dst.port One-way test (64KB window): ~ 870Mbps Two parallel one-way test (64KB window): total don't exceed ~ 850Mbps experiment 3 Server A - NIC trunk0 - Subnet A - @.111 and @.112 Server A - NIC em0 - trunkport, loadbalance Server A - NIC em1 - trunkport, loadbalance Server B - NIC trunk0 - Subnet B - @.222 and @.223 Server B - NIC em0 - trunkport, loadbalance Server B - NIC em0 - trunkport, loadbalance Switch side is well configured in aggregation with a hash algorithm based on src.mac+dst.mac+src.ip+dst.ip+src.port+dst.port One-way test (64KB window): ~ 870Mbps Two parallel one-way test (64KB window, on different IP @): total don't exceed ~ 850Mbps experiment 4 Server A - NIC trunk0 - Subnet A - @.111 and @.112 Server A - NIC em0 - trunkport, lacp Server A - NIC em1 - trunkport, lacp Server B - NIC trunk0 - Subnet B - @.222 and @.223 Server B - NIC em0 - trunkport, lacp Server B - NIC em0 - trunkport, lacp Switch side is well configured in aggregation with LACP standard. One-way test (64KB window): ~ 870Mbps Two parallel one-way test (64KB window, on different IP @): total don't exceed ~ 850Mbps experiment 5 Server A - NIC em0 - Subnet A - @.111 Server A - NIC em1 - Subnet B - @.111 Server B - NIC em0 - Subnet A - @.222 Server B - NIC em0 - Subnet B - @.222 Two parallel one-way test (64KB window, on different IP @): total don't exceed ~ 850Mbps question Why am I blocked at ~ 1Gbps limit ?
Thanks for your help. |
Tags |
aggregation, lacp, performance, poor, trunk |
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