Hi Paul, All virtual interfaces have "bandwidth" that has nothing to do with real number of bytes per second that can flow through the link, For example:
- all VSI interfaces have by default bandwidth of: "MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,", even tough the real interfaces "behind" are 10/half.... One way to explain this is that 10 years ago, in the time of hybrid Catalysts, the switching part of Catalyst (SP) was autonomous and consisted of real interfaces, and the routing MSFC part (RP) consisted of only SVIs. - all tunnel interface have default "bandwidth" of 8000kb, which is tricky way of saying to the routing protocol to not to prefer the route over the tunnel and use it only as last resort Also, all serial interface have default bandwidth of 1024kb, eventough they might be fractional T1's or anything else. -pavel skovajsa On Tue, Feb 23, 2010 at 2:30 AM, Paul Stewart <[email protected]> wrote: > Thanks Tim.... whew! ;) > > Actually, I was misreading the bandwidth statement itself - missed a zero > earlier so thought you could only set it to 1 Gig, now I realized you can > set it up to 10GE. Updated it to 2Gig and everything good now.. > > Much appreciated, > > Paul > > > -----Original Message----- > From: Tim Stevenson [mailto:[email protected]] > Sent: February-22-10 8:12 PM > To: Paul Stewart; [email protected] > Subject: Re: [c-nsp] 6500 SVI Question > > Hi Paul, > > The bandwidth does not affect the throughput etc and doesn't take > into account the underlying L2 interfaces bandwidth. It strictly for > use by the routing protocols to determine metrics (and can be > modified using the "bandwidth" interface command). Also you can > change the reference b/w using "ospf auto-cost reference-bandwidth" > under the "router ospf" process. > > Hope that helps, > Tim > > > At 04:56 PM 2/22/2010, Paul Stewart mumbled: > >>Hi there... >> >> >> >>Typically when we require higher bandwidth, we upgrade the interface to >>something larger ... recently though we were faced with having to do 2XGE > on >>a LAG until our new 10GE ports arrive. The SVI interface shows a bandwidth >>of 1 Gig even though there are two physical GigE interfaces "connected" to >>it.... will there be any issues doing more than a Gig on this SVI > interface? >>This is the first time amazingly that I've run across this ;) >> >> >> >>The card where the two GigE's come into is a 6148A-GE-TX and the ports are >>at opposite ends of the physical card... >> >> >> >>Thanks, appreciate it as always... >> >> >> >>Paul >> >> >> >> >> >> >> >>_______________________________________________ >>cisco-nsp mailing list [email protected] >><https://puck.nether.net/mailman/listinfo/cisco-nsp>https://puck.nether.net > /mailman/listinfo/cisco-nsp >>archive at >><http://puck.nether.net/pipermail/cisco-nsp/>http://puck.nether.net/piperma > il/cisco-nsp/ > > > > > Tim Stevenson, [email protected] > Routing & Switching CCIE #5561 > Technical Marketing Engineer, Cisco Nexus 7000 > Cisco - http://www.cisco.com > IP Phone: 408-526-6759 > ******************************************************** > The contents of this message may be *Cisco Confidential* > and are intended for the specified recipients only. > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
