I'm using the BVI for irb as below:
Router
* Giga Fast*
*stp forwarding* | | *stp blocking*
| |
Giga Fast
Switch1-------Switch2
Since stp is blocking on the link to the right, no funnel network will be
created since that link is only used as a backup.
So the forwarding interface is Giga on both ends. But the problem is that
Switch1 is negotiating to 100 with the BVI in this case.
Thanks,
- Mohammad
On Tue, Jul 27, 2010 at 1:20 AM, Tyson Scott <[email protected]> wrote:
> As you are bridging two interfaces the interface speeds need to match.
> It wouldn't be a good thing if the router created a network like a funnel.
> If you want it to operate at gig speeds then you need to gig interfaces.
>
>
>
> Regards,
>
>
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP
>
> Managing Partner / Sr. Instructor - IPexpert, Inc.
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> *From:* [email protected] [mailto:
> [email protected]] *On Behalf Of *Mohammad Itani
> *Sent:* Monday, July 26, 2010 6:06 PM
> *To:* Matt Hill
> *Cc:* [email protected]
> *Subject:* Re: [OSL | CCIE_RS] [CCIE - R&S] BVI - different Physical
> Interface Speeds!
>
>
>
> Hi Matt,
>
>
>
> The plugged device (switch) Gigabit interface is auto negotiating to 100.
>
> I'm talking about the speed not the bandwidth.
>
>
>
> Thanks,
>
> - Mohammad
>
> On Tue, Jul 27, 2010 at 12:27 AM, Matt Hill <[email protected]> wrote:
>
> HI Mohammad,
>
> Are you sure the interface is at 100/F? Is the interface just showing
> "bandwidth 100" under show interfaces?
>
> What speed is the device plugged into the Gigabit port of the BVI
> negotiating at?
>
> I have a feeling that the BVI is reporting 100 for the "bandwidth"
> statement for your routing, qos etc under show interfaces but the L2
> interface is still working at 1000.
>
> Cheers,
> Matt
>
> CCIE #22386
> CCSI #31207
>
>
> On 27 July 2010 04:14, Mohammad Itani <[email protected]> wrote:
> > My friend asked me a question about a BVI used to combine
> > one GigabitEthernet interface and one FastEthernetinterface.
> >
> > The BVI is always working at the speed of 100 Mbps although stp is
> blocking
> > the path through the FastEthernet (used as a backup path only).
> >
> > When he unplugs the fastethernet cable the bvi works at the gigabit speed
> > but when he plugs it again it falls to the lowest speed.
> >
> > Can we force BVI someway to perform at the speed of the Gigabit interface
> > and only fall back when the other path is not blocking?
> >
> > I know this doesn't seem to be logical but just maybe in case there's a
> way
> > to help my friend :)
> >
> > Thanks,
> >
> > - Mohammad
> >
>
> > _______________________________________________
> > For more information regarding industry leading CCIE Lab training, please
> > visit www.ipexpert.com
> >
> >
>
>
>
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