[c-nsp] Cisco trunk port startup delay

Shanawaz Batcha ismath.shaan at gmail.com
Tue Jul 23 22:39:51 EDT 2013

Fiber is not an option for the customer at the moment. So they will have to
live with about 5 seconds of loss.

@alan - carrier-delay msec 0 did not seem to make any difference, I still
lost 5 pings. I simply turned it on the single interface I am testing with
and assumed it will kick in.

On Wed, Jul 17, 2013 at 8:40 PM, <A.L.M.Buxey at lboro.ac.uk> wrote:

> Hi,
> > > * I am definitely not disabling spanning-tree. I have enabled 'portfast
> > > trunk' on the port which reduced the port uptime significantly.
> > > * Disabling a lot of negotiation protocols improves port initialization
> > > time as well
> spanning-tree portfast trunk
> switchport nonegotiate
> (that stops negotiation of type of port eg access/trunk/etherchannel etc)
> then tweak speed and duplex to your requirements (speed/duplex negotiation
> causes
> delay
> carrier-delay msec 0
> (that will mean none of the usual things occur and port can go live - use
> with care)
> alan

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