08-11-2012 08:28 AM - edited 03-07-2019 08:17 AM
This past networkers I was at the Cisco booth discussing how the 2248 can connect to the 5548 and have server connectivity. It was told to me that now, as of a fairly recent NX-OS release, you can have the 2248 going dual-homed to both 5548 via VPC and then have a server connected to both 2248 and be in active-active mode. Is this correct?
When we first deployed our 5548 and 2248 we had to put the 2248 in a straight pin mode, where it only had connections to one 5548 and then the server would dual connect to the 2248's and be in active-active mode. I was told that this changed with an NX-OS release however documentation still seems to be fragmented on what exactly is the case. Anyone have exerpeince or knowledge into the latest releases and capabilities?
Rob
08-11-2012 09:06 AM
Yes, you can uplink your 2248 to both 5548s. Have a look at this link for example and explanation:
you need NX-OS 5.1(3)N1(1) or later: You can also uplink your server to one or both FEXs.
http://nexusfu.blogspot.com/2012/01/enhanced-vpc.html
HTH
08-11-2012 05:51 PM
Duplicate post #1.
08-11-2012 05:58 PM
It was told to me that now, as of a fairly recent NX-OS release, you can have the 2248 going dual-homed to both 5548 via VPC and then have a server connected to both 2248 and be in active-active mode. Is this correct?
In THEORY, this is possible.
In PRACTICE, dual homing of a FEX to two 5000/5500 is best avoided. A mis-configuration can cause the Nexus 5K to have a split brain (worst case scenario).
In practice, it's best to single-home the FEX to a single Nexus 5K. It is also recommendable to vPC the links to-and-from the 5K and 2K.
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