Interconnecting MDS 9148 with 2 different Fiber Providers
I would like discuss the following issue :
We have 2 HP SAN EVA 8400 ( one at the production site and one at our Disaster Recovery site ) replicating using a fiber channel service from ( 2* FC dark fiber from PROVIDER A )
They are linked together with 4 Cisco MDS 9148 Multilayer Fabric Switch (2 fabric ).
We have recently purchased a new fiber service ( 2* 1Gb FC managed service from PROVIDER B) in order to create a port channel with the 2 running ones and we have some problem.
We disconnected the PROVIDER A FC ( running for 10 years now ) and left the SAN replication during a couple of days running with the new PROVIDER B 1 Gb FC to make sure the link was stable and we had no issue.
Then we tried to connect the 2 FC together from the 2 providers and tried to create a Port channel.
However we discovered that to create a PortChannel, interfaces must have the same configurations ( speed, mode, rate )
In our case , the interface FC 1/1 using PROVIDER A link is running at 4 Gb and the interface FC 1/2 using PROVIDER B is running at 1 Gb
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