On 8/4/12, Chuck Church <[email protected]> wrote: > Tunnel bandwidth command (or any interface bandwidth) is used for > statistics-computation only. It does factor into QOS too if you use > percentage type commands.
It's also used for eigrp route metrics. I suspect routing isn't the issue here tho > > I have some users experiencing slow file transfers over a GRE tunnel. The > > tunnel is riding over 10-gig links. To be able to use all the bandwidth, the tcp window size needs to be at least <bandwidth in bytes/sec> * <round trip time in seconds> So, for example, on a 10Gb link with a 2ms round trip time the tcp window needs to be 2.5MB. I remember WinXP defaulting to 16KB... Regards, Lee > I'm guessing there are two possible things to > look at. The CPU of the devices doing the tunnel endpoints is high because > of the encapsulation, or else the tunnel MTU is affecting the clients (if > TCP). > > Chuck > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of John Neiberger > Sent: Saturday, August 04, 2012 11:57 AM > To: [email protected] > Subject: [c-nsp] GRE tunnel bandwidth > > I have some users experiencing slow file transfers over a GRE tunnel. The > tunnel is riding over 10-gig links. I see that the default tunnel bandwidth > is 8 Mbps. Does that mean that the tunnel is rate limited to that value? If > so, is the simple solution raising the bandwidth with the "tunnel bandwidth > transmit" command? > > Thanks, > John > _______________________________________________ > 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/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
