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Forum Discussion
hpc-encs
Apr 12, 2024Aspirant
M4300-24x24F LAG-LACP configuration issues
Hi
I have 2 x M4300-24x24F stacked, and some servers connected directly to them via 10G Copper cables, 4 cables per server (2 cables per switch/unit).
My goal is to increase the bandwitdh using LAGs.
The servers NICs are configured in bonding: BONDING_OPTS="mode=802.3ad lacp_rate=fast xmit_hash_policy=layer2+3 miimon=100"
Ethtool detects: Speed: 40000Mb/s for the bonding interface (4 NICs)
On the switch side, I configured the LAG:
Admin mode:Enable
Link Trap:Enable
STP Mode:Enable
Static Mode: Disable
Hash Mode: Src/Dest MAC, VLAN Etype, incoming port
ports: 1/0/37,1/0/38, 2/0/37, 2/0/38
I tested the connection using iperf; and the result is always around 10Gbps.
Is something missing/bad in my configuration?
Thanks
Regards
Simply put: You need at least the same amount of sessions like you operate physical links. Each session will be run on a dedicated addresses. A common misunderstanding, no matter if people talk about IEEE standard LACP load balancing, or eg. Cisco proprietary implementations.
3 Replies
Hope you are aware even an LACP LAG does not magically create a single channel?
- hpc-encsAspirant
Hi
It'd be much appreciated if you develop more your answer.
Thanks
Simply put: You need at least the same amount of sessions like you operate physical links. Each session will be run on a dedicated addresses. A common misunderstanding, no matter if people talk about IEEE standard LACP load balancing, or eg. Cisco proprietary implementations.
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