[c-nsp] Nexus 2k - host ports

[Martin Clifton]

Hi Simon,

We came across a similar problem where we had no choice but retain some
Cat3750s in between the servers and our N2Ks.
On the connecting ports on the 3750:  spanning-tree bpdufilter enable
Not a great workaround, but is only short-term.

I'm not familiar with ILO but assume it is some sort of server management
port. Where I am they are Dell servers and DRAC ports (I think).
Whatever, they also are 100Mbps only.  Driven by the absence of 100Mbps
ports on our N2Ks, it motivated us to set up a separate "out-of-band"
management network based on spare Cat2960s and Cat3750s.

Regards, Martin







On 24/06/11 3:29 PM, "Thomason, Simon" <Simon.Thomason at racq.com.au> wrote:

>Hey All,
>
>Just doing a little research at the moment for some design work and I
>found out that you can not plug a switch into a nexus2k as all ports are
>host ports.
>
>I am certain a least a few people on here have had a look into this and
>was just wondering if there is some kind of work around?
>
>I have also been trying to find out if on the road map for the nexus
>platform there is something in the works to support this at a later date.
>
>Reason for plugging a switch into the Nexus2k's would be to allow the ilo
>ports which only operate at 100M to be plugged into a cheaper switch
>rather than burning up a 10/100/1000 extender per rack with a 10gig
>extender.
>
>---reference---
>Host interfaces are for host or server connectivity only; host interfaces
>cannot connect to another network. These interfaces are always enabled as
>edge ports; as they come up, these ports immediately transition to the
>forwarding state. Host interfaces are always enabled with BPDU Guard. If
>a BPDU is received, the port is immediately placed in an error-disabled
>state which keeps the link down.
>
>http://www.cisco.com/en/US/docs/switches/datacenter/nexus2000/sw/configura
>tion/guide/rel_4_0_1a/FEX-features.html
>
>Host interfaces are for host or server connectivity only; host interfaces
>cannot connect to another network. These interfaces are always enabled as
>edge ports; as they come up, these ports immediately transition to the
>forwarding state. Host interfaces are always enabled with BPDU Guard. If
>a BPDU is received, the port is immediately placed in an error-disabled
>state which keeps the link down.
>---reference---
>
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