Try hard coding the speed/duplex to 1000 on each respective interface? Ive bridged odd-sized interfaces over the years without too much drama (ie Ethernet to ISDN - dont ask why customer requirement)
Cheers, Matt CCIE #22386 CCSI #31207 On 27 July 2010 17:01, Mohammad Itani <[email protected]> wrote: > > 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. >> >> Mailto: [email protected] >> >> Telephone: +1.810.326.1444, ext. 208 >> >> Live Assistance, Please visit: www.ipexpert.com/chat >> >> eFax: +1.810.454.0130 >> >> >> >> IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, >> Audio Tools, Online Hardware Rental and Classroom Training for the Cisco >> CCIE (R&S, Voice, Security & Service Provider) certification(s) with >> training locations throughout the United States, Europe, South Asia and >> Australia. Be sure to visit our online communities at >> www.ipexpert.com/communities and our public website at www.ipexpert.com >> >> >> >> 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 >> > >> > >> >> > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
