Hello r/networking!
I'm working with a vendor trying to solve single-homed issue recently discovered within our DC.
Here's the issue (and if you need more information please let me know)
I've got two single arm concentrators connected to separate service edge switches. The active is connected to SE1 and the standby on SE2. They live on a vlan trunked on SE1..which is the huge problem.
So the logical idea would be to turn on HSRP and call it a day. Our CCIE vendor says that will create unequal cost multi path routing so layer 3 algorithms will decide on per flow basis which next hop it will use. This could create packet out of order issues per the vendor.
Their solution is to add a switch between our concentrators and the SE switches so OSPF will learn those macs, they can be port channeled and alls well in the event a SE goes down.
My boss hates this idea and suggested we can control traffic via tweaking of OSPF to force traffic out of a SE1 until it fails. The vendor is advising this isn't smart and could cause hard to troubleshoot issues.
Any suggestions or ideas appreciated.
SE switches in question are Nexus 3k's
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